Asus P7P55D User Manual
P7P55D  
 
Contents  
Contents...................................................................................................................... iii  
Notices ...................................................................................................................... vii  
Safety information.................................................................................................... viii  
About this guide......................................................................................................... ix  
P7P55D specifications summary.............................................................................. xi  
Chapter 1:  
Product introduction  
1.1  
1.2  
1.3  
Welcome! ....................................................................................................1-1  
Package contents.......................................................................................1-1  
Special features..........................................................................................1-2  
1.3.1  
1.3.2  
1.3.3  
1.3.4  
1.3.5  
Product highlights........................................................................1-2  
ASUS Xtreme Design—Hybrid Processor ..................................1-3  
ASUS Xtreme Design—Hybrid Phase ........................................1-3  
ASUS Xtreme Design—Hybrid OS .............................................1-3  
ASUS Exclusive Features...........................................................1-4  
Chapter 2:  
Hardware information  
2.1  
2.2  
Before you proceed ...................................................................................2-1  
Motherboard overview...............................................................................2-2  
2.2.1  
2.2.2  
2.2.3  
2.2.4  
Motherboard layout.....................................................................2-2  
Layout contents...........................................................................2-3  
Placement direction.....................................................................2-4  
Screw holes.................................................................................2-4  
2.3  
2.4  
Central Processing Unit (CPU) .................................................................2-5  
2.3.1  
2.3.2  
2.3.3  
Installing the CPU .......................................................................2-5  
Installing the CPU heatsink and fan............................................2-8  
Uninstalling the CPU heatsink and fan........................................2-9  
System memory .......................................................................................2-10  
2.4.1  
2.4.2  
2.4.3  
2.4.4  
Overview...................................................................................2-10  
Memory configurations.............................................................. 2-11  
Installing a DIMM ......................................................................2-19  
Removing a DIMM ....................................................................2-19  
2.5  
Expansion slots........................................................................................2-20  
2.5.1  
2.5.2  
2.5.3  
2.5.4  
2.5.5  
2.5.6  
Installing an expansion card......................................................2-20  
Configuring an expansion card .................................................2-20  
Interrupt assignments................................................................2-21  
PCI slots....................................................................................2-22  
PCI Express x1 slots.................................................................2-22  
PCI Express 2.0 x16 slots.........................................................2-22  
iii  
 
Contents  
2.6  
2.7  
2.8  
Onboard switch........................................................................................2-24  
Jumpers....................................................................................................2-25  
Connectors...............................................................................................2-27  
2.8.1  
2.8.2  
2.8.3  
2.8.4.  
Rear panel connectors..............................................................2-27  
Audio I/O connections...............................................................2-28  
Internal connectors....................................................................2-31  
ASUS Q-Connector (system panel)..........................................2-40  
2.9  
Onboard LEDs..........................................................................................2-41  
Starting up for the first time....................................................................2-42  
Turning off the computer.........................................................................2-42  
2.10  
2.11  
Chapter 3:  
BIOS setup  
3.1  
3.2  
Knowing BIOS............................................................................................3-1  
Updating BIOS............................................................................................3-1  
3.2.1  
3.2.2  
3.2.3  
ASUS Update utility.....................................................................3-1  
ASUS EZ Flash 2 utility...............................................................3-5  
ASUS CrashFree BIOS 3 utility...................................................3-6  
3.3  
BIOS setup program..................................................................................3-6  
Entering BIOS Setup at startup....................................................................3-6  
Entering BIOS Setup after POST.................................................................3-6  
3.3.1  
3.3.2  
3.3.3  
3.3.4  
3.3.5  
3.3.6  
3.3.7  
3.3.8  
3.3.9  
BIOS menu screen......................................................................3-7  
Menu bar.....................................................................................3-7  
Navigation keys...........................................................................3-8  
Menu items..................................................................................3-8  
Submenu items...........................................................................3-8  
Configuration fields .....................................................................3-8  
Pop-up window............................................................................3-8  
Scroll bar.....................................................................................3-8  
General help................................................................................3-8  
3.4  
3.5  
Main menu ..................................................................................................3-9  
3.4.1  
3.4.2  
3.4.3  
3.4.4  
SATA 1-6 .....................................................................................3-9  
Storage Configuration............................................................... 3-11  
AHCI Configuration................................................................... 3-11  
System Information...................................................................3-12  
Ai Tweaker menu......................................................................................3-13  
3.5.1  
3.5.2  
3.5.3  
3.5.4  
OC Tuner Utility.........................................................................3-13  
OC Tuner limit Value ................................................................3-13  
Ai Overclock Tuner ...................................................................3-14  
CPU Ratio Setting ....................................................................3-14  
iv  
Contents  
3.5.5  
Intel(R) SpeedStep(TM) Tech ..................................................3-15  
Intel(R) TurboMode Tech ..........................................................3-15  
Xtreme Phase Full Power Mode ..............................................3-15  
DRAM Frequency .....................................................................3-15  
DRAM Timing Control ..............................................................3-15  
CPU Differential Amplitude .......................................................3-17  
CPU Clock Skew ......................................................................3-17  
CPU Voltage Mode [Offset] ......................................................3-17  
IMC Voltage .............................................................................3-18  
DRAM Voltage .........................................................................3-18  
CPU PLL Voltage .....................................................................3-18  
PCH Voltage .............................................................................3-18  
DRAM DATA REF Voltage on CHA/B ......................................3-19  
DRAM CTRL REF Voltage on CHA/B ......................................3-19  
Load-Line Calibration ...............................................................3-19  
CPU Spread Spectrum .............................................................3-19  
PCIE Spread Spectrum ............................................................3-19  
3.5.6  
3.5.7  
3.5.8  
3.5.9.  
3.5.10  
3.5.11  
3.5.12  
3.5.13  
3.5.14  
3.5.15  
3.5.16  
3.5.17  
3.5.18  
3.5.19  
3.5.20  
3.5.21  
3.6  
Advanced menu .......................................................................................3-20  
3.6.1  
3.6.2  
3.6.3  
3.6.4  
3.6.5  
3.6.6  
3.6.7  
CPU Configuration....................................................................3-20  
North Bridge Configuration........................................................3-22  
Onboard Device Configuration..................................................3-23  
USB Configuration ....................................................................3-24  
PCIPnP .....................................................................................3-25  
Intel VT-d Configuration ...........................................................3-25  
T.Probe .....................................................................................3-25  
3.7  
Power menu..............................................................................................3-25  
3.7.1  
3.7.2  
3.7.3  
3.7.4  
3.7.5  
3.7.6  
3.7.7  
Suspend Mode .........................................................................3-26  
Repost Video on S3 Resume ...................................................3-26  
ACPI 2.0 Support .....................................................................3-26  
ACPI APIC Support ..................................................................3-26  
EuP Ready ...............................................................................3-26  
APM Configuration....................................................................3-27  
Hardware Monitor......................................................................3-28  
3.8  
3.9  
Boot menu ................................................................................................3-29  
3.8.1  
3.8.2  
3.8.3  
Boot Device Priority...................................................................3-29  
Boot Settings Configuration ......................................................3-30  
Security.....................................................................................3-31  
Tools menu ...............................................................................................3-33  
3.9.1 ASUS O.C. Profile.....................................................................3-33  
v
Contents  
3.9.2  
3.9.3  
3.9.4  
AI NET 2....................................................................................3-34  
ASUS EZ Flash 2......................................................................3-34  
Express Gate ...........................................................................3-35  
3.10  
Exit menu..................................................................................................3-36  
Chapter 4:  
Software support  
4.1  
4.2  
Installing an operating system .................................................................4-1  
Support DVD information..........................................................................4-1  
4.2.1  
4.2.2  
Running the support DVD...........................................................4-1  
Obtaining the software manuals..................................................4-2  
4.3  
Software information.................................................................................4-3  
4.3.1  
4.3.2  
4.3.3  
4.3.4  
4.3.5  
4.3.6  
ASUS PC Probe II.......................................................................4-3  
ASUS AI Suite.............................................................................4-4  
ASUS Fan Xpert..........................................................................4-5  
ASUS EPU-6 Engine...................................................................4-6  
ASUS Express Gate....................................................................4-7  
VIA® High Definition Audio utility .................................................4-8  
4.4  
ASUS Unique Overclocking Utility—TurboV EVO...................................4-9  
4.4.1  
4.4.2  
4.4.3  
Using ASUS TurboV....................................................................4-9  
Using ASUS TurboV Auto Tuning Mode....................................4-10  
Using ASUS Turbo Key............................................................. 4-11  
4.5  
RAID configurations ................................................................................4-12  
4.5.1  
4.5.2  
4.5.3  
4.5.4  
RAID definitions ........................................................................4-12  
Installing Serial ATA hard disks .................................................4-13  
Setting the RAID item in BIOS..................................................4-13  
Intel® Matrix Storage Manager option ROM utility.....................4-13  
4.6  
Creating a RAID driver disk.....................................................................4-17  
4.6.1  
4.6.2  
4.6.3  
4.6.4  
Creating a RAID driver disk without entering the OS................4-17  
Creating a RAID driver disk in Windows®..................................4-17  
Installing the RAID driver during Windows® OS installation......4-18  
Using a USB floppy disk drive...................................................4-18  
Chapter 5:  
5.1  
Multiple GPU technology support  
ATI® CrossFireX™ technology..................................................................5-1  
5.1.1  
5.1.2  
5.1.3  
5.1.4  
5.1.5  
Requirements..............................................................................5-1  
Before you begin.........................................................................5-1  
Installing two CrossFireX™ graphics cards ................................5-2  
Installing the device drivers.........................................................5-3  
Enabling the ATI® CrossFireX™ technology ...............................5-3  
vi  
Notices  
Federal Communications Commission Statement  
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two  
conditions:  
•
•
This device may not cause harmful interference, and  
This device must accept any interference received including interference that may cause  
undesired operation.  
This equipment has been tested and found to comply with the limits for a Class B digital  
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference in a residential installation. This  
equipment generates, uses and can radiate radio frequency energy and, if not installed  
and used in accordance with manufacturer’s instructions, may cause harmful interference  
to radio communications. However, there is no guarantee that interference will not occur  
in a particular installation. If this equipment does cause harmful interference to radio or  
television reception, which can be determined by turning the equipment off and on, the user  
is encouraged to try to correct the interference by one or more of the following measures:  
•
•
•
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment to an outlet on a circuit different from that to which the receiver is  
connected.  
•
Consult the dealer or an experienced radio/TV technician for help.  
The use of shielded cables for connection of the monitor to the graphics card is required  
to assure compliance with FCC regulations. Changes or modifications to this unit not  
expressly approved by the party responsible for compliance could void the user’s authority  
to operate this equipment.  
Canadian Department of Communications Statement  
This digital apparatus does not exceed the Class B limits for radio noise emissions from  
digital apparatus set out in the Radio Interference Regulations of the Canadian Department  
of Communications.  
This class B digital apparatus complies with Canadian ICES-003.  
REACH  
Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of  
Chemicals) regulatory framework, we published the chemical substances in our products at  
ASUS REACH website at http://green.asus.com/english/REACH.htm.  
DO NOT throw the motherboard in municipal waste. This product has been designed to  
enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin  
indicates that the product (electrical and electronic equipment) should not be placed in  
municipal waste. Check local regulations for disposal of electronic products.  
DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol  
of the crossed out wheeled bin indicates that the battery should not be placed in municipal  
waste.  
vii  
 
Safety information  
Electrical safety  
•
To prevent electrical shock hazard, disconnect the power cable from the electrical outlet  
before relocating the system.  
•
When adding or removing devices to or from the system, ensure that the power cables  
for the devices are unplugged before the signal cables are connected. If possible,  
disconnect all power cables from the existing system before you add a device.  
•
•
•
Before connecting or removing signal cables from the motherboard, ensure that all  
power cables are unplugged.  
Seek professional assistance before using an adapter or extension cord. These devices  
could interrupt the grounding circuit.  
Ensure that your power supply is set to the correct voltage in your area. If you are not  
sure about the voltage of the electrical outlet you are using, contact your local power  
company.  
•
If the power supply is broken, do not try to fix it by yourself. Contact a qualified service  
technician or your retailer.  
•
The optical S/PDIF is an optional component (may or may not be included in your  
motherboard) and is defined as a CLASS 1 LASER PRODUCT.  
INVISIBLE LASER RADIATION, AVOID EXPOSURE TO BEAM.  
•
•
•
Never dispose of the battery in fire. It could explode and release harmful substances into  
the environment.  
Never dispose of the battery with your regular household waste. Take it to a hazardous  
material collection point.  
Never replace the battery with an incorrect battery type.  
•
•
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.  
DISPOSE OF USED BATTERIES ACCORDING TO THE ABOVE BATTERY-  
RELATED INSTRUCTIONS.  
Operation safety  
•
•
•
•
Before installing the motherboard and adding devices on it, carefully read all the manuals  
that came with the package.  
Before using the product, ensure all cables are correctly connected and the power  
cables are not damaged. If you detect any damage, contact your dealer immediately.  
To avoid short circuits, keep paper clips, screws, and staples away from connectors,  
slots, sockets and circuitry.  
Avoid dust, humidity, and temperature extremes. Do not place the product in any area  
where it may become wet.  
This motherboard should only be used in environments with ambient temperatures between  
5°C (41°F) and 40°C (104°F).  
•
Place the product on a stable surface.  
•
If you encounter technical problems with the product, contact a qualified service  
technician or your retailer.  
viii  
 
About this guide  
This user guide contains the information you need when installing and configuring the motherboard.  
How this guide is organized  
This guide contains the following parts:  
•
Chapter 1: Product introduction  
This chapter describes the features of the motherboard and the new technology it  
supports.  
•
Chapter 2: Hardware information  
This chapter lists the hardware setup procedures that you have to perform when  
installing system components. It includes description of the switches, jumpers, and  
connectors on the motherboard.  
•
•
•
Chapter 3: BIOS setup  
This chapter tells how to change system settings through the BIOS Setup menus.  
Detailed descriptions of the BIOS parameters are also provided.  
Chapter 4: Software support  
This chapter describes the contents of the support DVD that comes with the  
motherboard package and the software.  
Chapter 5: Multiple GPU technology support  
This chapter describes how to install and configure multiple ATI® CrossFireX™  
graphics cards.  
Where to find more information  
Refer to the following sources for additional information and for product and software updates.  
1.  
ASUS websites  
The ASUS website provides updated information on ASUS hardware and software  
products. Refer to the ASUS contact information.  
2.  
Optional documentation  
Your product package may include optional documentation, such as warranty flyers,  
that may have been added by your dealer. These documents are not part of the  
standard package.  
ix  
 
Conventions used in this guide  
To ensure that you perform certain tasks properly, take note of the following symbols used  
throughout this manual.  
DANGER/WARNING: Information to prevent injury to yourself when trying to  
complete a task.  
CAUTION: Information to prevent damage to the components when trying to  
complete a task.  
IMPORTANT: Instructions that you MUST follow to complete a task.  
NOTE: Tips and additional information to help you complete a task.  
Typography  
Bold text  
Italics  
Indicates a menu or an item to select.  
Used to emphasize a word or a phrase.  
<Key>  
Keys enclosed in the less-than and greater-than sign means  
that you must press the enclosed key.  
Example: <Enter> means that you must press the Enter or  
Return key.  
<Key1> + <Key2> + <Key3> If you must press two or more keys simultaneously, the key  
names are linked with a plus sign (+).  
Example: <Ctrl> + <Alt> + <Del>  
x
P7P55D specifications summary  
LGA1156 socket for Intel® Core™ i7 Processors/  
CPU  
Core™ i5 processors  
Supports Intel® Turbo Boost Technology  
* Refer to www.asus.com for Intel CPU support list  
Chipset  
Memory  
Intel® P55 Express Chipset  
Dual channel memory architecture  
-
4 x 240-pin DIMM sockets support unbuffered non-ECC  
DDR3 2133(O.C.)* / 1600 / 1333 / 1066 MHz  
memeory modules  
-
Supports up to 16GB system memory  
Supports Intel® Extreme Memory Profile (XMP)  
*
Hyper DIMM support is subject to the physical characteristics  
of individual CPUs. Some hyper DIMMs only support one  
DIMM per channel.  
** Refer to www.asus.com or this user manual for the  
Memory QVL (Qualified Vendors Lists)  
2 x PCI Express 2.0 x 16 slots  
Expansion Slots  
-
-
One slot at x16 mode (single, blue)  
One slot at x4 mode, 2.5GT/s (black)  
2 x PCI Express 2.0 x1 slots (2.5GT/s)  
3 x PCI slots  
Supports ATI® Quad-GPU CrossFireX™ Technology  
Multi-GPU Support  
Storage  
Intel® P55 Express Chipset:  
-
-
6 x SATA 3.0 Gb/s ports  
Intel® Matrix Storage Technology supporting SATA RAID  
0,1, 5, and 10  
JMicron® JMB363 SATA & PATA controller  
-
-
-
1 x Ultra DMA 133/100/66 for up to 2 PATA devices  
1 x SATA 3.0 Gb/s port (black)  
1 x eSATA 3.0 Gb/s port (SATA on-the-go)  
Realtek® 8112L Gigabit LAN controller featuring AI NET2  
LAN  
14 x USB 2.0 ports (6 ports at mid-board, 8 ports at rear panel)  
USB  
VIA® VT6308P controller supports 2 x IEEE 1394a ports  
(one at mid-board, one at rear panel)  
IEEE 1394  
VIA® VT1828S 8-channel High Definition Audio CODEC  
Audio  
-
-
-
-
Absolute Pitch BD192/24  
DTS Surround Sensation UltraPC  
BD audio layer Content Protection  
Supports Jack-Detection, Multi-streaming,  
and Front Panel Jack-Retasking  
Optical S/PDIF out port at back I/O  
-
ASUS Q-Design  
ASUS Q-Design:  
-
-
-
ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED)  
ASUS Q-Slot  
ASUS Q-DIMM  
(continued on the next page)  
xi  
 
P7P55D specifications summary  
ASUS Unique Features  
ASUS Hybrid Processor – ASUS TurboV EVO  
Auto Tuning, TurboV, and Turbo Key  
-
ASUS Hybrid Phase  
-
-
T.Probe Technology for Active Cooling  
12+2 Phase Power Design  
ASUS Hybrid OS – Express Gate  
ASUS Xtreme Design  
ASUS Exclusive Features  
-
-
MemOK!  
ASUS EPU  
ASUS Quiet Thermal Solution:  
-
-
-
ASUS Fanless Design: Stylish Heat-sink solution  
ASUS Fanless Design: Stack Cool 3  
ASUS Fan Xpert  
ASUS Crystal Sound  
ASUS Noise Filter  
-
ASUS EZ DIY:  
-
-
-
-
-
-
-
ASUS Q-Shield  
ASUS Q-Connector  
ASUS O.C. Profile  
ASUS CrashFree BIOS 3  
ASUS EZ Flash 2  
ASUS My Logo 2  
Multi-language BIOS  
ASUS Exclusive  
Precision Tweaker 2:  
Overclocking Features  
-
-
-
-
-
vCore: Adjustable CPU voltage at 0.00625V increment  
vIMC: 49-step IMC voltage control  
vDRAM Bus: 81-step DRAM voltage control  
vPCH: 2-step chipset voltage control  
vCPU PLL: 4-step reference voltage control  
SFS (Stepless Frequency Selection):  
-
Internal Base Clock tuning from 80MHz up to 500 MHz at  
1MHz increment  
-
PCI Express frequency tuning from 100MHz up to 200MHz  
at 1MHz increment  
Overclocking Protection:  
ASUS C.P.R.(CPU Parameter Recall)  
-
Back Panel I/O Ports  
1 x PS/2 Keyboard port (Purple)  
1 x PS/2 Mouse port (Green)  
1 x Optical S/PDIF Out  
1 x IEEE1394a  
1 x eSATA 3.0 Gb/s port (SATA on-the-go)  
1 x RJ45 port  
8 x USB 2.0/1.1  
8-channel Audio I/O  
(continued on the next page)  
xii  
P7P55D specifications summary  
3 x USB connectors support additional 6 USB ports  
Internal I/O Connectors  
1 x IDE connector  
7 x SATA connectors  
1 x CPU Fan connector  
2 x Chassis Fan connectors (1 x 4-pin, 1 x 3-pin)  
1 x Power Fan connector  
1 x IEEE1394a connector  
1 x COM port connector  
Front panel audio connector  
1 x S/PDIF Out Header  
CD audio in  
24-pin ATX Power connector  
1 x 8-pin ATX 12V Power connectors  
System Panel (Q-Connector)  
1 x MemOK! button  
16 Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS  
2.5, ACPI 2.0a, Multi-language BIOS, ASUS EZ Flash 2, ASUS  
CrashFree BIOS 3  
BIOS Features  
Manageability  
WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE  
Support DVD Contents  
Drivers  
ASUS Utilities  
ASUS Update  
Anti-virus software (OEM version)  
Form Factor  
ATX Form Factor, 12”x 9.6” (30.5cm x 24.4cm)  
*Specifications are subject to change without notice.  
xiii  
xiv  
Chapter 1  
Chapter 1:  
Product introduction  
1.1  
Welcome!  
Thank you for buying an ASUS® P7P55D motherboard!  
The motherboard delivers a host of new features and latest technologies, making it another  
standout in the long line of ASUS quality motherboards!  
Before you start installing the motherboard, and hardware devices on it, check the items in  
your package with the list below.  
1.2  
Package contents  
Check your motherboard package for the following items.  
User Manual  
ASUS P7P55D motherboard  
User guide  
Support DVD  
1 x Ultra DMA 133/  
100/66 cable  
4 x Serial ATA 3.0Gb/s cables  
1 x ASUS Q-Shield  
1 x 2-in-1 ASUS Q-Connector kit  
•
If any of the above items is damaged or missing, contact your retailer.  
•
The illustrated items above are for your reference only. Actual product specifications  
may vary with different models.  
ASUS P7P55D  
1-1  
1.3  
Special features  
1.3.1  
Product highlights  
Green ASUS  
This motherboard and its packaging comply with the European Union’s Restriction on the  
use of Hazardous Substances (RoHS). This is in line with the ASUS vision of creating  
environment-friendly and recyclable products/packagings to safeguard consumers’ health  
while minimizing the impact on the environment.  
Intel® LGA1156 Lynnfield Processor Ready  
This motherboard supports the latest Intel® Lynnfield processors in LGA1156 package, which  
has memory and PCI Express controller integrated to support 2-channel (4 DIMMs) DDR3  
memory and 16 PCI Express 2.0 lanes, providing great graphics performance. Intel® Lynnfield  
processor is one of the most powerful and energy efficient CPU in the world. Refer to page  
2-5 for details.  
Intel® P55  
The Intel® P55 Express Chipset is the latest one-chipset design to support the latest 1156  
socket Intel® Core™ i7 / Core™ i5 processors. Intel P55 provides improved performance by  
utilizing serial point-to-point links, allowing increased bandwidth and stability.  
PCIe 2.0 support  
Double Speed; Double Bandwidth  
This motherboard supports the latest PCIe 2.0 devices for double speed and bandwidth that  
enhances system performance. Refer to page 2-22 for details.  
Quad-GPU CrossFireX™ support!  
Flexible Multi-GPU solution, Your Weapon of Choice!  
P7P55D brings you the multi-GPU choice of CrossFireX™. The motherboard features the  
most powerful Intel® P55 platform to optimize PCIe allocation in multiple GPU configurations.  
Expect a brand-new gaming style you’ve never experienced before! Refer to Chapter 5 for  
details.  
Dual-Channel DDR3 DDR3 2133 (O.C.)/1600/1333/1066 support  
The motherboard supports DDR3 memory that features data transfer rates of 2133(O.C.) /  
1600 / 1333 / 1066 MHz to meet the higher bandwidth requirements of the latest 3D graphics,  
multimedia, and Internet applications. The dual-channel DDR3 architecture enlarges the  
bandwidth of your system memory to boost system performance. Refer to page 2-10 for  
details.  
1-2  
Chapter 1: Product Introduction  
1.3.2  
ASUS Xtreme Design—Hybrid Processor  
TurboV EVO  
Ultimate O.C. Processor  
The ultimate O.C. processor satisfies every level of overclockers—from die-hard enthusiasts  
to beginners. Auto tuning intelligently pushes the system to the fastest clock speeds while  
maintaining stability. Turbo Key boosts performance with just one touch; while TurboV offers  
more options to advanced overclockers to achieve world O.C. record. Refer to page 4-9 for  
details.  
Auto Tuning  
Auto System Level Up  
Auto Tuning is an intelligent tool that automates overclocking to achieve a total system level  
up. This tool also provides stability testing. Even O.C. beginners can achieve extreme yet  
stable overclocking results with Auto Tuning! Refer to page 4-10 for details.  
1.3.3  
ASUS Xtreme Design—Hybrid Phase  
T.Probe  
Leading Active Cooling Technology  
The T.Probe microchip detects and balances power phase loading and temperature in real-  
time. This feature optimizes the power phase functions, allowing components to run at lower  
temperatures and extending their lifespan.  
ASUS 12+2 Phase Power Design  
Unprecedented Innovation with the Best Quality Component for Best Performance  
The groundbreaking 12+2 phase VRM design is brought to the ASUS motherboards. 12+2  
phase power design, 12-phase for vCore and extra 2-phase for Memory controller inside  
CPU can provide the highest power efficiency, and hence generates less heat to effectively  
enhance the overclocking capability. With the high quality power components such as low  
RDS (on) MOSFETs, Ferrite core chokes with lower hysteresis loss and 100% Japan-made  
high quality conductive polymer capacitors, ASUS 12+2 phase VRM design also ensure  
longer component life and minimum power loss.  
1.3.4  
ASUS Xtreme Design—Hybrid OS  
ASUS Express Gate  
Instant Online! Instant Fun!  
Express Gate is an ASUS exclusive OS that provides you with quick access to the Internet  
and key applications without entering the Windows® OS. Refer to page 3-36 and 4-7 for  
details.  
The actual boot time is subject to hardware configurations and product models.  
ASUS P7P55D  
1-3  
1.3.5  
ASUS Exclusive Features  
MemOK!  
Any Memory is A-OK!  
Memory compatibility is among the top concerns during computer upgrades. Worry no more.  
MemOK! is the fastest memory booting solution today. This remarkable memory rescue tool  
requires nothing but a push of a button to patch memory issues and get your system up and  
running in no time. The technology is able to determine failsafe settings that can dramatically  
improve your system booting success. Refer to page 2-24 for details.  
ASUS EPU  
System Level Energy Saving  
The new ASUS EPU—the world’s first power saving engine, has been upgraded to a new 6  
engine version, which provides total system power savings by detecting current PC loadings  
and intelligently moderating power in real-time. With auto phase switching for components  
(which includes the CPU, VGA card, memory, chipset, hard drives and CPU cooler / system  
fans), the EPU automatically provides the most appropriate power usage via intelligent  
acceleration and overclocking—helping save power and money. Refer to page 4-6 for details.  
ASUS Quiet Thermal Solutions  
ASUS Quiet Thermal solutions make the system more stable and enhances the overclocking  
capability.  
ASUS Fanless Design—Heat-sink solution  
The heat sink design effectively directs the chipsets’ generated heat to the heatsink  
near the back I/O ports, where the generated heat is carried away by the existing  
airflow from the CPU fan. This innovative and groundbreaking design effectively lowers  
the system temperature by 10˚C, prevents any problems that are typical to standard  
chipsets, and allows you to install a side-flow fan or passive cooler. The heat sink  
design provides you with the most reliable fanless thermal solution.  
Up to 20ºC (36ºF) Cooler—Stack Cool 3  
Effective Fanless Heat Dissipation at 0dB  
Stack Cool 3 is a fanless cooling solution offered exclusively by ASUS. It effectively  
and noiselessly transfers heat generated by the critical components to the other side  
of the specially designed PCB (printed circuit board) for effective heat dissipation—  
making temperatures cooler by up to 20˚C.  
Fan Xpert  
Active Quiet & Cool  
ASUS Fan Xpert intelligently allows users to adjust both the CPU and chassis fan  
speed according to different ambient temperature, which is caused by different climate  
conditions in different geographic regions and system loading. Built-in variety of useful  
profiles offer flexible controls of fan speed to achieve a quiet and cool environment.  
Refer to page 4-5 for details.  
1-4  
Chapter 1: Product Introduction  
ASUS Crystal Sound  
This feature can enhance speech-centric applications like Skype, online game, video  
conference and recording.  
ASUS Noise Filter  
Eliminate background noise while recording  
This feature detects repetitive and stationary noises like computer fans, air  
conditioners, and other background noises then eliminates it in the incoming audio  
stream while recording.  
ASUS EZ DIY  
ASUS EZ DIY feature collection provides you with easy ways to install computer components,  
update the BIOS or back up your favorite settings.  
ASUS Q-Design  
DIY quickly, DIY easily!  
ASUS Q-Design enhances your DIY experience. All of Q-LED, Q-Slot and Q-DIMM  
design speed up and simplify the DIY process!  
ASUS Q-Shield  
Easy and Comfortable Installations  
The specially designed ASUS Q-Shield does without the usual “fingers”—making  
it convenient and easy to install. With better electric conductivity, it ideally protects  
your motherboard against static electricity and shields it against Electronic Magnetic  
Interference (EMI).  
ASUS Q-Connector  
Make connection quick and accurate!  
The ASUS Q-Connector allows you to connect or disconnect chassis front panel cables  
in one easy step with one complete module. This unique module eliminates the trouble  
of plugging in one cable at a time, making connection quick and accurate. Refer to  
page 2-40 for details.  
ASUS EZ-Flash 2  
Simply update BIOS from a USB flash drive before entering the OS  
EZ Flash 2 is a user-friendly BIOS update utility. Simply launch this tool and update  
BIOS from a USB flash drive before entering the OS. You can update your BIOS only in  
a few clicks without preparing an additional floppy diskette or using an OS-based flash  
utility. Refer to page 3-5 for details.  
ASUS O.C. Profile  
Conveniently restore or load multiple BIOS settings  
Freely share and distribute favorite overclocking settings. The motherboard features  
the ASUS O.C. Profile that allows users to conveniently store or load multiple BIOS  
settings. The BIOS settings can be stored in the CMOS or a separate file, giving users  
freedom to share and distribute their favorite overclocking settings. Refer to page 3-34  
for details.  
ASUS P7P55D  
1-5  
ASUS MyLogo2™  
This feature allows you to convert your favorite photo into a 256-color boot logo for a more  
colorful and vivid image on your screen.  
ASUS Multi-language BIOS  
The multi-language BIOS allows you to select the language of your choice from the available  
options. The localized BIOS setup menu helps you configure your system easier and faster.  
1-6  
Chapter 1: Product Introduction  
Chapter 2  
Chapter 2:  
Hardware information  
2.1  
Before you proceed  
Take note of the following precautions before you install motherboard components or change  
any motherboard settings.  
•
•
Unplug the power cord from the wall socket before touching any component.  
Before handling components, use a grounded wrist strap or touch a safely grounded  
object or a metal object, such as the power supply case, to avoid damaging them due  
to static electricity.  
•
•
Hold components by the edges to avoid touching the ICs on them.  
Whenever you uninstall any component, place it on a grounded antistatic pad or in the  
bag that came with the component.  
•
Before you install or remove any component, ensure that the ATX power supply is  
switched off or the power cord is detached from the power supply. Failure to do so  
may cause severe damage to the motherboard, peripherals, or components.  
ASUS P7P55D  
2-1  
2.2  
Motherboard overview  
2.2.1  
Motherboard layout  
Refer to 2.8 Connectors for more information about rear panel connectors and internal  
connectors.  
2-2  
Chapter 2: Hardware information  
2.2.2  
Layout contents  
Connectors/Jumpers/Slots  
Page  
2-38  
2-5  
1.  
2.  
3.  
4.  
5.  
ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)  
LGA1156 CPU Socket  
DDR3 DIMM slots  
2-10  
2-26  
2-37  
DRAM overvoltage jumper (3-pin OV_DRAM)  
CPU, chassis, and power fan connectors (4-pin CPU_FAN,  
4-pin CHA_FAN1, 3-pin CHA_FAN2, 3-pin PWR_FAN)  
6.  
Serial port connector (9-pin COM1)  
2-36  
2-24  
2-32  
2-34  
2-33  
2-39  
2-25  
2-35  
2-41  
2-36  
2-35  
2-31  
2-31  
7.  
MemOK! switch  
8.  
IDE connector (40-1 pin PRI_EIDE)  
9.  
JMicron JMB363 Serial ATA connector (7-pin SATA_E1)  
P55 Serial ATA connectors (7-pin SATA1-6)  
System panel connector (20-8 pin PANEL)  
Clear RTC RAM (3-pin CLRTC)  
10.  
11.  
12.  
13.  
14.  
15.  
16.  
17.  
18.  
USB connectors (10-1 pin USB910, USB1112, USB1314)  
Standby power LED  
IEEE 1394a port connector (10-1 pin IE1394_2)  
Optical drive audio connector (4-pin CD)  
Front panel audio connector (10-1 pin AAFP)  
Digital audio connector (4-1 pin SPDIF_OUT)  
ASUS P7P55D  
2-3  
2.2.3  
Placement direction  
When installing the motherboard, ensure that you place it into the chassis in the correct  
orientation. The edge with external ports goes to the rear part of the chassis as indicated in  
the image below.  
2.2.4  
Screw holes  
Place nine screws into the holes indicated by circles to secure the motherboard to the  
chassis.  
DO NOT overtighten the screws! Doing so can damage the motherboard.  
Place this side towards  
the rear of the chassis  
2-4  
Chapter 2: Hardware information  
2.3  
Central Processing Unit (CPU)  
The motherboard comes with a surface mount LGA1156 socket designed for the Intel®  
Core™ i7 / Core™ i5 Processor.  
Ensure that all power cables are unplugged before installing the CPU.  
•
Upon purchase of the motherboard, ensure that the PnP cap is on the socket and  
the socket contacts are not bent. Contact your retailer immediately if the PnP cap  
is missing, or if you see any damage to the PnP cap/socket contacts/motherboard  
components. ASUS will shoulder the cost of repair only if the damage is shipment/  
transit-related.  
•
•
Keep the cap after installing the motherboard. ASUS will process Return Merchandise  
Authorization (RMA) requests only if the motherboard comes with the cap on the  
LGA1156 socket.  
The product warranty does not cover damage to the socket contacts resulting from  
incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP  
cap.  
2.3.1  
Installing the CPU  
To install a CPU:  
1. Locate the CPU socket on the motherboard.  
2.  
Press the load lever with your thumb (A),  
and then move it to the right (B) until it is  
released from the retention tab.  
Load lever  
A
B
To prevent damage to the socket pins,  
do not remove the PnP cap unless  
you are installing a CPU.  
Retention tab  
ASUS P7P55D  
2-5  
3.  
4.  
5.  
Lift the load lever in the direction of the  
arrow until the load plate is completely  
lifted.  
Load plate  
Remove the PnP cap from the CPU  
socket.  
PnP cap  
Position the CPU over the socket,  
ensuring that the gold triangle is on the  
bottom-left corner of the socket, and then  
fit the socket alignment keys into the CPU  
notches.  
CPU notches  
The CPU fits in only one correct  
orientation. DO NOT force the CPU  
into the socket to prevent bending  
the connectors on the socket and  
damaging the CPU!  
Gold  
triangle  
mark  
Alignment keys  
2-6  
Chapter 2: Hardware information  
6.  
Apply some Thermal Interface Material  
to the exposed area of the CPU that the  
heatsink will be in contact with, ensuring  
that it is spread in an even thin layer.  
Some heatsinks come with pre-  
applied thermal paste. If so, skip this  
step.  
The Thermal Interface Material is  
toxic and inedible. DO NOT eat it. If  
it gets into your eyes or touches your  
skin, wash it off immediately, and seek  
professional medical help.  
7.  
Close the load plate (A), and then push  
down the load lever (B), ensuring that  
the front edge of the load plate slides  
under the retention knob (C).  
B
A
C
8.  
Insert the load lever under the retention  
tab.  
ASUS P7P55D  
2-7  
2.3.2  
Installing the CPU heatsink and fan  
The Intel® LGA1156 processor requires a specially designed heatsink and fan assembly to  
ensure optimum thermal condition and performance.  
•
When you buy a boxed Intel® processor, the package includes the CPU fan and  
heatsink assembly. If you buy a CPU separately, ensure that you use only  
Intel®-certified multi-directional heatsink and fan.  
•
•
Your Intel® LGA1156 heatsink and fan assembly comes in a push-pin design and  
requires no tool to install.  
Use an LGA1156-compatible CPU heatsink and fan assembly only. The LGA1156  
socket is incompatible with the LGA775 and LGA1366 sockets in size and dimension.  
If you purchased a separate CPU heatsink and fan assembly, ensure that the Thermal  
Interface Material is properly applied to the CPU heatsink or CPU before you install the  
heatsink and fan assembly.  
Ensure that you have installed the motherboard to the chassis before you install the CPU  
fan and heatsink assembly.  
To install the CPU heatsink and fan:  
1.  
Place the heatsink on top of the installed  
CPU, making sure that the four fasteners  
match the holes on the motherboard.  
A
B
B
2.  
Push down two fasteners at a time in  
a diagonal sequence to secure the  
heatsink and fan assembly in place.  
A
A
B
B
A
1
1
Orient the heatsink and fan assembly such that the CPU fan cable is closest to the CPU fan  
connector.  
2-8  
Chapter 2: Hardware information  
3.  
Connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN.  
DO NOT forget to connect the CPU fan connector! Hardware monitoring errors can occur if  
you fail to plug this connector.  
2.3.3  
Uninstalling the CPU heatsink and fan  
To uninstall the CPU heatsink and fan:  
1.  
Disconnect the CPU fan cable from the  
connector on the motherboard.  
A
2.  
3.  
Rotate each fastener counterclockwise.  
B
B
Pull up two fasteners at a time in a  
diagonal sequence to disengage the  
heatsink and fan assembly from the  
motherboard.  
A
A
B
B
A
4.  
Carefully remove the heatsink and fan assembly from the motherboard.  
ASUS P7P55D  
2-9  
2.4  
System memory  
2.4.1  
Overview  
The motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Modules  
(DIMM) sockets.  
A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched  
differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for  
better performance with less power consumption.  
The figure illustrates the location of the DDR3 DIMM sockets:  
Recommended memory configurations  
One DIMM:  
Install one memory module in slot A1 or B1 first as a single-channel operation.  
Two DIMMs (dual-channel operation):  
Four DIMMs (dual-channel operation):  
2-10  
Chapter 2: Hardware information  
2.4.2  
Memory configurations  
You may install 1GB, 2GB and 4GB unbuffered and non-ECC DDR3 DIMMs into the DIMM  
sockets.  
•
You may install varying memory sizes in Channel A and Channel B. The system maps  
the total size of the lower-sized channel for the dual-channel configuration. Any excess  
memory from the higher-sized channel is then mapped for single-channel operation.  
•
•
•
Due to Intel spec definition, X.M.P. DIMMs are supported for one DIMM per channel  
only.  
According to Intel CPU spec, DIMM voltage below 1.65V is recommended to protect  
the CPU.  
According to Intel CPU spec, CPUs with a core frequency of 2.66G support the  
maximum DIMM frequency of up to DDR3-1333. To use DIMMs of a higher frequency  
with a 2.66G CPU, enable the DRAM O.C. Profile feature in BIOS. Refer to section  
3.5.3 Ai Overclock Tuner for details.  
•
•
Always install DIMMs with the same CAS latency. For optimum compatibility, we  
recommend that you obtain memory modules from the same vendor.  
Due to the memory address limitation on 32-bit Windows OS, when you install 4GB  
or more memory on the motherboard, the actual usable memory for the OS can be  
about 3GB or less. For effective use of memory, we recommend that you do any of the  
following:  
- Use a maximum of 3GB system memory if you are using a 32-bit Windows OS.  
- Install a 64-bit Windows OS when you want to install 4GB or more on the  
motherboard.  
For more details, refer to the Microsoft® support site at  
http://support.microsoft.com/kb/929605/en-us.  
•
•
This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less  
(Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1 Megabyte/MB).  
The default memory operation frequency is dependent on its Serial Presence Detect  
(SPD), which is the standard way of accessing information from a memory module.  
Under the default state, some memory modules for overclocking may operate at a  
lower frequency than the vendor-marked value. To operate at the vendor-marked  
or at a higher frequency, refer to section 3.5 Ai Tweaker menu for manual memory  
frequency adjustment.  
•
For system stability, use a more efficient memory cooling system to support a full  
memory load (4 DIMMs) or overclocking condition.  
ASUS P7P55D  
2-11  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1067MHz  
capability for CPU at 2.66, 2.8 and 2.93GHz  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Timing  
Lable(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
•
B*  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
C*  
•
CORSAIR CM3X1024-1066C7  
1024MB DS N/A  
Heat-Sink Package  
D9KPT  
7
1.1  
Crucial  
Crucial  
Crucial  
Crucial  
Crucial  
Crucial  
ELPIDA  
ELPIDA  
ELPIDA  
ELPIDA  
Hynix  
CT12864BA1067.8FF  
CT12864BA1067.8SFD  
CT12872BA1067.9FF  
CT25664BA1067.16FF  
1024MB SS MICRON  
1024MB SS MICRON  
1024MB SS MICRON  
2048MB DS MICRON  
7(1066-7-7-7-20)  
•
•
D9JNL  
7
•
•
D9KPT(ECC)  
7(1066-9-9-9-25)  
•
•
D9KPT  
7(1066-7-7-7-20)  
•
•
CT25664BA1067.16SFD 2048MB DS MICRON  
D9JNL  
7
•
•
CT25672BA1067.18FF  
EBJ10UE8BAW0-AE-E  
EBJ11RD8BAFA-AE-E  
EBJ11UD8BAFA-AG-E  
EBJ21UE8BAW0-AE-E  
2048MB DS MICRON  
1024MB SS ELPIDA  
1024MB DS ELPIDA  
1024MB DS ELPIDA  
2048MB DS ELPIDA  
D9KPT(ECC)  
7(1066-7-7-7-20)  
•
•
J1108BABG-DJ-E  
J5308BASE-AC-E(ECC)  
J5308BASE-AC-E  
J1108BABG-DJ-E  
H5TQ1G83AFPG7C  
HY5TQ1G831ZNFP-G7  
H5TQ1G83AFPG7C  
HY5TQ1G831ZNFP-G7  
J1108BABG-DJ-E  
J1108BABG-DJ-E  
7(1066-7-7-7-20)  
•
•
7
•
•
8
•
•
7(1066-7-7-7-20)  
•
•
HMT112U6AFP8C-G7N0 1024MB SS HYNIX  
HYMT112U64ZNF8-G7 1024MB SS HYNIX  
HMT125U6AFP8C-G7N0 2048MB DS HYNIX  
7
•
•
Hynix  
7
•
Hynix  
7
•
•
•
•
•
•
•
•
•
Hynix  
HYMT125U64ZNF8-G7  
2048MB DS HYNIX  
1024MB SS ELPIDA  
2048MB DS ELPIDA  
7
KINGSTON KVR1066D3N7/1G  
KINGSTON KVR1066D3N7/2G  
KINGSTON KVR1066D3N7/4G  
1066-7-7-7-20  
1066-7-7-7-20  
1066-7-7-7-20  
7
1.5  
1.5  
1.5  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
4096MB DS SAMSUNG K4B2G0846B-HCF8  
MT8JTF12864AY-1G1D1 1024MB SS MICRON 7VD22  
MICRON  
MICRON  
MICRON  
MICRON  
MICRON  
MICRON  
MICRON  
MICRON  
MT8JTF12864AZ-1G1F1 1024MB SS MICRON  
8ZF22 D9KPV  
7(1066-7-7-7-20)  
7(1066-7-7-7-20)  
7(1066-9-9-9-25)  
7
MT8JTF12864AZ-1G1F1 1024MB SS MICRON  
MT9JSF12872AZ-1G1F1 1024MB SS MICRON  
MT16JTF25664AY-1G1D1 2048MB DS MICRON  
MT16JTF25664AZ-1G1F1 2048MB DS MICRON  
MT16JTF25664AZ-1G1F1 2048MB DS MICRON  
MT18JSF25672AZ-1G1F1 2048MB DS MICRON  
D9KPT  
D9KPT(ECC)  
7VD22  
•
•
•
8ZF22 D9KPV  
D9KPT  
7(1066-7-7-7-20)  
7(1066-7-7-7-20)  
7(1066-7-7-7-20)  
8(7-7-7-20)  
7(1066-7-7-7-20)  
(7-7-7-20)  
(7-7-7-20)  
7
D9KPT(ECC)  
SAMSUNG M378B5273BH1-CF8  
Transcend TS256MLK64V1U  
4096MB DS SAMSUNG K4B2G0846B-HCF8  
1.5  
•
•
•
•
•
2048MB DS ELPIDA  
1024MB SS Asint  
2048MB DS Asint  
1024MB DS Qimonda  
J1108BABG-AE-E  
DDRIII1208-AE  
Asint  
SLY3128M8-EAE  
SLZ3128M8-EAE  
3DU3191A-10  
Asint  
DDRIII1208-AE  
WINTEC  
IDSH51-03A1F1C-10F  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1333MHz  
capability for CPU at 2.66, 2.8 and 2.93GHz  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
•
B*  
•
C*  
•
A-DATA  
A-DATA  
A-DATA  
Apacer  
Apacer  
Apacer  
Apacer  
Apacer  
Apacer  
AD133301GOU  
AD1333002GOU  
AD31333E002G0U  
78.01GC6.420  
78.01GC6.9L0  
78.01GC8.422  
78.A1GC6.421  
78.A1GC6.9L1  
78.A1GC8.423  
1024MB  
2048MB  
SS A-DATA  
DS A-DATA  
AD30908C8D-15IG  
AD30908C8D-15IG  
Heat-Sink Package  
J1108BABG-DJ-E  
1333-9-9-9-24  
1333-9-9-9-24  
•
•
•
6144MB(Kit of 3) DS N/A  
7-7-7-20(1333-9-9-9-24) 1.65-1.85  
(1333-9-9-9-24)  
•
•
•
1024MB  
1024MB  
1024MB  
2048MB  
2048MB  
2048MB  
SS ELPIDA  
•
•
•
SS Apacer  
SS ELPIDA  
DS ELPIDA  
DS Apacer  
DS ELPIDA  
AM5D5808AEWSBG 9(1333-9-9-9-24)  
J1108BABG-DJ-E(ECC) (1333-9-9-9-24)  
•
•
•
•
•
J1108BABG-DJ-E  
(1333-9-9-9-24)  
•
•
•
•
•
•
AM5D5808AEWSBG 9(1333-9-9-9-24)  
J1108BABG-DJ-E(ECC) (1333-9-9-9-24)  
•
•
•
•
CORSAIR TR3X3G1333C9 (Ver2.1)  
CORSAIR CM3X1024-1333C9DHX  
3072MB(Kit of 3) SS N/A  
1024MB DS N/A  
Heat-Sink Package  
Heat-Sink Package  
9-9-9-24(1333-9-9-9-24) 1.5  
(1333-9-9-9-24) 1.1  
•
•
•
•
BoxP/N:TWIN3X2048-1333C9  
CORSAIR  
2048MB(Kit of 2) DS N/A  
Heat-Sink Package  
9-9-9-24(1066-7-7-7-20) 1.70  
9-9-9-24(1066-7-7-7-20) 1.70  
•
•
•
•
•
(CM3X1024-1333C9)Ver1.1  
BoxP/N:TW3X4G1333C9DHX  
CORSAIR  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
Heat-Sink Package  
Heat-Sink Package  
(CM3X2048-1333C9DHX)Ver3.2  
CORSAIR TR3X6G1333C9 (Ver2.1)  
9-9-9-24(1333-9-9-9-24) 1.5  
9(1333-9-9-9-24)  
•
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•
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•
•
Crucial  
Crucial  
Crucial  
Crucial  
CT12864BA1339.8FF  
CT12864BA1339.8SFD  
CT12872BA1339.9FF  
CT25664BA1339.16FF  
1024MB  
1024MB  
1024MB  
2048MB  
SS MICRON D9KPT  
SS MICRON MT8JF12864AY-1G4D1 (1333-9-9-9-24)  
SS MICRON D9KPT(ECC)  
DS MICRON D9KPT  
9(1333-9-9-9-24)  
9(1333-9-9-9-24)  
2-12  
Chapter 2: Hardware information  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1333MHz  
capability for CPU at 2.66, 2.8 and 2.93GHz (continued)  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
B*  
C*  
Crucial  
Crucial  
ELPIDA  
ELPIDA  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
GEIL  
CT25672BA1339.18FF  
BL25664BA1336.16SFB1  
EBJ10UE8BAW0-DJ-E  
EBJ21UE8BAW0-DJ-E  
F3-10600CL7D-2GBPI  
F3-10600CL8D-2GBHK  
2048MB  
DS MICRON D9KPT(ECC)  
9(1333-9-9-9-24)  
•
•
•
4096MB(Kit of 2) DS NA  
Heat-Sink Package  
J1108BABG-DJ-E  
J1108BABG-DJ-E  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
H5TQ1G83BFR  
6-6-6-20(1333-9-9-9-24) 1.8  
9(1333-9-9-9-24)  
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1024MB  
2048MB  
SS ELPIDA  
DS ELPIDA  
9(1333-9-9-9-24)  
2048MB(Kit of 2) SS N/A  
2048MB(Kit of 2) SS N/A  
(1337-7-7-7-18)  
(1337-8-8-8-22)  
1.65  
1.65  
•
•
•
•
•
•
•
•
•
•
•
•
F3-10666CL7T-6GBPK(XMP) 2048MB  
DS N/A  
7-7-7-18(1333-7-7-7-18) 1.5-1.6  
8-8-8-21(1333-7-7-7-20) 1.5-1.6  
9-9-9-24(1333-9-9-9-24) 1.5  
7-7-7-24(1333-8-8-8-28) 1.5  
9(1333-9-9-9-24)  
F3-10666CL8D-4GBHK(XMP) 4096MB(Kit of 2) DS N/A  
F3-10666CL9T-6GBNQ  
GV34GB1333C7DC  
6144MB(Kit of 3) DS N/A  
4096MB(Kit of 2) DS N/A  
Hynix  
HMT112U6BFR8C-H9  
HMT125U6BFR8C-H9  
HMT125U6BFR8C-H9  
1024MB  
2048MB  
2048MB  
1024MB  
1024MB  
2048MB  
2048MB  
SS Hynix  
Hynix  
DS Hynix  
H5TQ1G83BFR  
9(1333-9-9-9-24)  
Hynix  
DS Hynix  
H5TQ1G83BFRH9C  
J1108BASE-DJ-E  
J1108BABG-DJ-E  
J1108BABG-DJ-E  
J1108BABG-DJ-E  
9(1333-9-9-9-24)  
KINGMAX FLFD45F-B8EE9  
KINGSTON KVR1333D3N9/1G  
KINGSTON KVR1333D3N9/2G  
KINGSTON KVR1333D3N9/2G  
SS ELPIDA  
SS ELPIDA  
DS ELPIDA  
DS ELPIDA  
(1333-9-9-9-24)  
9(1066-8-7-7-20)  
1333-9-9-9-24  
1.5  
1.5  
1.5  
9(1066-8-7-7-20)  
(1333-9-9-9-24)  
9(1066-8-8-8-20)  
9(1333-9-9-9-24)  
9(1333-9-9-9-24)  
9(1333-9-9-9-24)  
9(1066-8-8-8-20)  
9(1333-9-9-9-24)  
(1066-6-5-5-20)  
MICRON  
MICRON  
MICRON  
MICRON  
MICRON  
MICRON  
MICRON  
OCZ  
MT8JTF12864AY-1G4BYES 1024MB  
SS MICRON Z9HWR  
MT8JTF12864AZ-1G4F1  
MT8JTF12864AZ-1G4F1  
MT9JSF12872AZ-1G4F1  
MT16JF25664AZ-1G4F1  
MT16JTF25664AZ-1G4F1  
MT18JSF25672AZ-1G4F1  
OCZ3RPX1333EB2GK  
OCZ3G1333LV3GK  
1024MB  
1024MB  
1024MB  
2048MB  
2048MB  
2048MB  
1024MB  
SS MICRON 9FF22 D9KPT  
SS MICRON D9KPT  
•
•
•
•
•
•
SS MICRON D9KPT(ECC)  
DS MICRON D9KPT  
DS MICRON 9FF22 D9KPT  
DS MICRON D9KPT(ECC)  
SS N/A  
Heat-Sink Package  
OCZ  
3072MB(Kit of 3) SS N/A  
3072MB(Kit of 3) SS N/A  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
9-9-9(1066-7-7-7-20) 1.65  
7-7-7(1066-7-7-7-16) 1.65  
7-7-7-20(1333-9-9-9-24)  
OCZ  
OCZ3P1333LV3GK  
•
OCZ  
OCZ3P13332GK  
1024MB  
DS N/A  
OCZ  
OCZ3P13334GK  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS NA  
7(1333-7-7-7-20)  
1.8  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
OCZ  
OCZ3G1333LV6GK  
9-9-9(1066-7-7-7-20) 1.65  
7-7-7(1066-7-7-7-20) 1.65  
8-8-8(1066-7-7-7-16) 1.6  
9(1333-9-9-9-24)  
OCZ  
OCZ3P1333LV6GK  
OCZ  
OCZX1333LV6GK(XMP)  
SAMSUNG M378B2873DZ1-CH9  
SAMSUNG M378B2873EH1-CH9  
SAMSUNG M391B2873DZ1-CH9  
SAMSUNG M378B5673DZ1-CH9  
SAMSUNG M378B5673EH1-CH9  
SAMSUNG M391B5673DZ1-CH9  
SAMSUNG M378B5273BH1-CH9  
Super Talent W1333UX2GB(XMP)  
Transcend TS128MLK64V3U  
Transcend TS256MLK64V3U  
1024MB  
1024MB  
1024MB  
2048MB  
2048MB  
2048MB  
4096MB  
SS SAMSUNG K4B1G0846D  
SS SAMSUNG K4B1G0846E  
1066-8-7-7-20  
SS SAMSUNG K4B1G0846D(ECC)  
DS SAMSUNG K4B1G0846D  
9(1333-9-9-9-24)  
9(1333-9-9-9-24)  
DS SAMSUNG K4B1G0846E  
1066-8-7-7-20  
DS SAMSUNG K4B1G0846D(ECC)  
DS SAMSUNG K4B2G0846B-HCH9  
9(1333-9-9-9-24)  
9(1333-9-9-9-24)  
2048MB(Kit of 2) SS N/A  
Heat-Sink Package  
SS SAMSUNG K4B1G0846D  
DS SAMSUNG K4B1G0846D  
8(1333-8-8-8-24)  
9(1333-9-9-9-24)  
9(1333-9-9-9-24)  
(9-9-9-24)  
1.8  
1024MB  
2048MB  
1024MB  
1024MB  
2048MB  
2048MB  
1024MB  
1024MB  
Asint  
Asint  
Asint  
Asint  
ASUS  
SLY3128M8-EDJ  
SLY3128M8-EDJE  
SLZ3128M8-EDJ  
SLZ3128M8-EDJE  
N/A  
SS Asint  
SS ELPIDA  
DS Asint  
DS ELPIDA  
DS N/A  
DDRIII1208-DJ  
J1108BASE-DJ-E  
DDRIII1208-DJ  
1066-8-8-8-20  
(9-9-9-24)  
J1108BASE-DJ-E  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
1066-8-8-8-20  
(1333-9-9-9-24)  
(1066-7-7-7-20)  
7-7-7-20(1066-8-7-7-20)  
(1066-7-7-7-20)  
7(1337-7-7-7-20)  
BUFFALO FSX1333D3G-1G  
BUFFALO FSH1333D3G-T3G(XMP)  
BUFFALO FSX1333D3G-2G  
SS N/A  
3072MB(Kit of 3) SS N/A  
•
2048MB  
1024MB  
DS N/A  
Patriot  
Patriot  
Patriot  
Patriot  
Patriot  
PDC32G1333LLK  
PVT33G1333ELK  
PVS34G1333ELK  
PVS34G1333LLK  
PVT36G1333ELK  
SS PATRIOT Heat-Sink Package  
1.7  
•
•
•
3072MB(Kit of 3) SS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
9-9-9-24(1066-7-7-7-20) 1.65  
9-9-9-24(1066-7-7-7-20) 1.5  
7-7-7-20(1066-7-7-7-20) 1.7  
9-9-9-24(1066-7-7-7-20) 1.65  
•
•
•
•
•
•
Silicon  
Power  
SP001GBLTU133S02  
SP002GBLTU133S02  
1024MB  
2048MB  
SS S-POWER I0YT3E0  
DS S-POWER I0YT3E0  
9(1333-9-9-9-24)  
9(1333-9-9-9-24)  
•
•
•
•
Silicon  
Power  
•
ASUS P7P55D  
2-13  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1600MHz  
capability for CPU at 2.66GHz  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
•
B*  
•
C*  
•
A-DATA  
A-DATA  
AD31600E001GMU  
3072MB(Kit of 3) SS N/A  
6144MB(Kit of 3) DS N/A  
Heat-Sink Package 8-8-8-24(1333-9-9-9-24) 1.65-1.85  
Heat-Sink Package 7-7-7-20(1333-9-9-9-24) 1.75-1.85  
Heat-Sink Package 8-8-8-24(1601-8-8-8-24) 1.65  
Heat-Sink Package 8-8-8-24(1600-8-8-8-24) 1.65  
Heat-Sink Package 9-9-9-24(1601-9-9-9-24) 1.65  
AD31600F002GMU(XMP)  
•
•
•
CORSAIR TR3X3G1600C8D(XMP)Ver2.1 3072MB(Kit of 3) SS N/A  
CORSAIR TR3X3G1600C8D 3072MB(Kit of 3) SS N/A  
•
•
•
•
CORSAIR TR3X3G1600C9(XMP)Ver1.1 3072MB(Kit of 3) SS N/A  
BoxP/N:TW3X4G1600C9DHXNV  
•
•
CORSAIR  
4096MB(Kit of 2) DS N/A  
Heat-Sink Package (1333-9-9--9-24)  
1.80  
•
•
•
(CM3X2G1600C9DHXNV)Ver4.1  
CORSAIR TR3X6G1600C8D(XMP)Ver2.1 6144MB(Kit of 3) DS N/A  
CORSAIR TR3X6G1600C8D 6144MB(Kit of 3) DS N/A  
CORSAIR TR3X6G1600C9(XMP)Ver2.1 6144MB(Kit of 3) DS N/A  
Heat-Sink Package 8-8-8-24(1601-8-8-8-24) 1.65  
Heat-Sink Package 8-8-8-24(1600-8-8-8-24) 1.65  
Heat-Sink Package 9-9-9-24(1333-9-9-9-24) 1.65  
•
•
•
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•
•
•
•
Crucial  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
GEIL  
BL12864BA1608.8SFB(XMP) 1024MB  
F3-12800CL9D-2GBNQ 2048MB(Kit of 2) SS N/A  
F3-12800CL8T-6GBHK(XMP) 6144MB(Kit of 3) DS N/A  
SS N/A  
Heat-Sink Package (1601-8-8-8-24)  
Heat-Sink Package (1333-9-9-9-24)  
1.8  
1.6  
Heat-Sink Package 8-8-8-21(1333-8-8-8-21) 1.6-1.65  
Heat-Sink Package 8-8-8-21(1066-8-8-8-20) 1.6~1.65  
Heat-Sink Package 9-9-9-24(1601-9-9-9-24) 1.5-1.6  
Heat-Sink Package 8-8-8-28(1600-8-8-8-28) 1.6  
F3-12800CL8T-6GBPI(XMP)  
F3-12800CL9T-6GBNQ  
GV34GB1600C8DC  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
4096MB(Kit of 2) DS N/A  
1024MB  
KINGMAX FLGD45F-B8KG9-NAES  
KINGMAX FLGE85F-B8KG9-NEES  
SS KINGMAX KFB8FNGXF-ANX-12A 9(1600-9-8-9-28)  
1.5  
2048MB  
DS KINGMAX KFB8FNGXF-ANX-12A 9(1600-9-8-9-28)  
1.5  
KINGSTON KHX12800D3LLK3/3GX(XMP) 3072MB(Kit of 3) SS N/A  
KINGSTON KHX12800D3K2/4G 4096MB(Kit of 2) DS N/A  
KINGSTON KHX12800D3LLK3/6GX(XMP) 6144MB(Kit of 3) DS N/A  
Heat-Sink Package 1600-8-8-8-20  
Heat-Sink Package 9(1333-9-9-9-24)  
Heat-Sink Package (1066-8-8-8-20)  
Heat-Sink Package 7-6-6-24(1333-7-7-7-20)  
1.65  
1.9  
1.65  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ3P1600EB1G  
OCZ3G1600LV3GK  
OCZ3P1600LV3GK  
OCZ3P16004GK  
1024MB  
SS N/A  
3072MB(Kit of 3) SS N/A  
3072MB(Kit of 3) SS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
2048MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
3072MB(Kit of 3) SS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
Heat-Sink Package 8-8-8(1066-7-7-7-20) 1.65  
Heat-Sink Package 7-7-7(1066-7-7-7-20) 1.65  
Heat-Sink Package 7-7-7(1333-7-7-7-20) 1.9  
Heat-Sink Package 7-7-6(1333-7-7-7-20) 1.8  
Heat-Sink Package 8-8-8(1066-7-7-7-16) 1.65  
Heat-Sink Package 8-8-8(1066-7-7-7-16) 1.65  
Heat-Sink Package 7-7-7-14(1066-7-7-7-20) 1.7-1.9  
Heat-Sink Package 7-7-7-20  
•
•
OCZ3P1600EB4GK  
OCZ3G1600LV6GK  
OCZ3X1600LV6GK(XMP)  
•
•
•
•
•
•
Cell Shock CS322271  
Mushkin  
Mushkin  
Patriot  
Patriot  
Patriot  
Patriot  
Patriot  
Patriot  
PQI  
996657  
998659(XMP)  
Heat-Sink Package 9-9-9-24(1333-9-9-9-24) 1.5-1.6  
Heat-Sink Package 9-9-9-24(1066-7-7-7-20) 1.65  
Heat-Sink Package 9-9-9-24(1066-7-7-7-20) 1.8  
Heat-Sink Package 7-7-7-20(1066-7-7-7-20) 1.9  
Heat-Sink Package 7-7-7-20(1066-7-7-7-20) 2.0  
Heat-Sink Package 9-9-9-24(1066-7-7-7-20) 1.65  
Heat-Sink Package 9-9-9-24(1600-7-7-7-20) 1.65  
1066-8-8-8-20  
PVT33G1600ELK  
PVS34G1600ELK  
PVS34G1600LLK(XMP)  
PVS34G1600LLKN  
PVT36G1600ELK  
PVT36G1600ELK  
MFADR401PA0102(XMP)  
•
•
•
•
2048MB  
DS SAMSUNG K4B1G08460  
2-14  
Chapter 2: Hardware information  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1600MHz  
capability for CPU at 2.8 and 2.93GHz  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
•
B*  
•
C*  
•
A-DATA  
A-DATA  
AD31600E001GMU  
3072MB(Kit of 3) SS N/A  
6144MB(Kit of 3) DS N/A  
Heat-Sink Package 8-8-8-24(1333-9-9-9-24) 1.65-1.85  
Heat-Sink Package 7-7-7-20(1333-9-9-9-24) 1.75-1.85  
Heat-Sink Package 8-8-8-24(1601-8-8-8-24) 1.65  
Heat-Sink Package 8-8-8-24(1600-8-8-8-24) 1.65  
Heat-Sink Package 9-9-9-24(1601-9-9-9-24) 1.65  
AD31600F002GMU(XMP)  
•
•
•
CORSAIR TR3X3G1600C8D(XMP)Ver2.1 3072MB(Kit of 3) SS N/A  
•
•
CORSAIR TR3X3G1600C8D  
3072MB(Kit of 3) SS N/A  
3072MB(Kit of 3) SS N/A  
•
•
CORSAIR TR3X3G1600C9(XMP)Ver1.1  
•
•
CORSAIR BoxP/N:TW3X4G1600C9DHXNV 4096MB(Kit of 2) DS N/A  
(CM3X2G1600C9DHXNV)Ver4.1  
Heat-Sink Package (1333-9-9--9-24)  
1.80  
•
•
•
CORSAIR TR3X6G1600C8D(XMP)Ver2.1 6144MB(Kit of 3) DS N/A  
Heat-Sink Package 8-8-8-24(1601-8-8-8-24) 1.65  
Heat-Sink Package 8-8-8-24(1600-8-8-8-24) 1.65  
Heat-Sink Package 9-9-9-24(1333-9-9-9-24) 1.65  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
CORSAIR TR3X6G1600C8D  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
CORSAIR TR3X6G1600C9(XMP)Ver2.1  
Crucial  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
GEIL  
BL12864BA1608.8SFB(XMP)  
F3-12800CL9D-2GBNQ  
F3-12800CL8T-6GBHK(XMP)  
F3-12800CL8T-6GBPI(XMP)  
F3-12800CL9T-6GBNQ  
GV34GB1600C8DC  
1024MB  
SS N/A  
Heat-Sink Package (1601-8-8-8-24)  
Heat-Sink Package (1333-9-9-9-24)  
1.8  
1.6  
2048MB(Kit of 2) SS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
4096MB(Kit of 2) DS N/A  
Heat-Sink Package 8-8-8-21(1333-8-8-8-21) 1.6-1.65  
Heat-Sink Package 8-8-8-21(1066-8-8-8-20) 1.6~1.65  
Heat-Sink Package 9-9-9-24(1601-9-9-9-24) 1.5-1.6  
Heat-Sink Package 8-8-8-28(1600-8-8-8-28) 1.6  
SS KINGMAX KFB8FNGXF-ANX-12A 9(1600-9-8-9-28) 1.5  
KINGMAX FLGD45F-B8KG9-NAES  
KINGMAX FLGE85F-B8KG9-NEES  
1024MB  
2048MB  
DS KINGMAX KFB8FNGXF-ANX-12A 9(1600-9-8-9-28)  
1.5  
KINGSTON KHX12800D3LLK3/3GX(XMP) 3072MB(Kit of 3) SS N/A  
Heat-Sink Package 1600-8-8-8-20  
Heat-Sink Package 9(1066-9-9-9-24)  
Heat-Sink Package 9(1333-9-9-9-24)  
Heat-Sink Package (1066-8-8-8-20)  
Heat-Sink Package 7-6-6-24(1333-7-7-7-20)  
1.65  
KINGSTON KHX12800D3K3/12GX(XMP)  
KINGSTON KHX12800D3K2/4G  
12288MB(Kitof3) DS N/A  
4096MB(Kit of 2) DS N/A  
1.9  
KINGSTON KHX12800D3LLK3/6GX(XMP) 6144MB(Kit of 3) DS N/A  
1.65  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ3P1600EB1G  
1024MB  
SS N/A  
OCZ3G1600LV3GK  
OCZ3P1600LV3GK  
OCZ3P16004GK  
3072MB(Kit of 3) SS N/A  
3072MB(Kit of 3) SS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
2048MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
3072MB(Kit of 3) SS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
4096MB(Kit of 2) DS N/A  
6144MB(Kit of 3) DS N/A  
6144MB(Kit of 3) DS N/A  
Heat-Sink Package 8-8-8(1066-7-7-7-20) 1.65  
Heat-Sink Package 7-7-7(1066-7-7-7-20) 1.65  
Heat-Sink Package 7-7-7(1333-7-7-7-20) 1.9  
Heat-Sink Package 7-7-6(1333-7-7-7-20) 1.8  
•
•
OCZ3P1600EB4GK  
OCZ3X16004GK  
•
Heat-Sink Package 7-7-7-20  
1.9  
OCZ3G1600LV6GK  
OCZ3X1600LV6GK(XMP)  
OCZ3X1600LV6GK(XMP)  
Heat-Sink Package 8-8-8(1066-7-7-7-16) 1.65  
Heat-Sink Package 8-8-8(1600-8-8-8-24) 1.65  
Heat-Sink Package 8-8-8(1066-7-7-7-16) 1.65  
Heat-Sink Package 1333-8-8-8-24  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
SuperTalent WB160UX6GB(XMP)  
Cell Shock CS322271  
Heat-Sink Package 7-7-7-14(1066-7-7-7-20) 1.7-1.9  
Heat-Sink Package 7-7-7-20  
Mushkin  
Mushkin  
Patriot  
Patriot  
Patriot  
Patriot  
Patriot  
Patriot  
PQI  
996657  
998659(XMP)  
Heat-Sink Package 9-9-9-24(1333-9-9-9-24) 1.5-1.6  
Heat-Sink Package 9-9-9-24(1066-7-7-7-20) 1.65  
Heat-Sink Package 9-9-9-24(1066-7-7-7-20) 1.8  
Heat-Sink Package 7-7-7-20(1066-7-7-7-20) 1.9  
Heat-Sink Package 7-7-7-20(1066-7-7-7-20) 2.0  
Heat-Sink Package 9-9-9-24(1066-7-7-7-20) 1.65  
Heat-Sink Package 9-9-9-24(1600-7-7-7-20) 1.65  
1066-8-8-8-20  
PVT33G1600ELK  
PVS34G1600ELK  
PVS34G1600LLK(XMP)  
PVS34G1600LLKN  
PVT36G1600ELK  
PVT36G1600ELK  
MFADR401PA0102(XMP)  
•
•
•
•
2048MB  
DS SAMSUNG K4B1G08460  
ASUS P7P55D  
2-15  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1625MHz  
capability for CPU at 2.66GHz  
DIMM socket  
support (Optional)  
Chip  
Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
SS/DS  
Chip NO.  
Voltage  
A*  
•
B*  
•
C*  
•
KINGSTON  
KINGSTON  
KINGSTON  
KHX13000D3LLK2/2GN(EPP)  
2048MB(Kit of 2) SS  
N/A  
N/A  
N/A  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
1.9  
1.9  
1.9  
KHX13000D3LLK2/2GX(XMP) 2048MB(Kit of 2) SS  
KHX13000D3LLK2/2GXN 2048MB(Kit of 2) SS  
•
•
•
•
•
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1625MHz  
capability for CPU at 2.8 and 2.93GHz  
DIMM socket  
support (Optional)  
Chip  
Brand  
Timing  
Lable(Bios)  
Vendor  
Part No.  
Size  
SS/DS  
Chip NO.  
Voltage  
A*  
•
B*  
•
C*  
•
KINGSTON  
KINGSTON  
KINGSTON  
KHX13000D3LLK2/2GN(EPP) 2048MB(Kit of 2) SS  
KHX13000D3LLK2/2GX(XMP) 2048MB(Kit of 2) SS  
N/A  
N/A  
N/A  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
1.9  
1.9  
1.9  
•
•
•
KHX13000D3LLK2/2GXN  
2048MB(Kit of 2) SS  
•
•
•
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1800MHz  
capability for CPU at 2.66GHz  
DIMM socket  
support  
Voltage  
(Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
A*  
B*  
C*  
Apacer  
78.0AGCD-CDZ(XMP)  
2GB(Kit of 2) SS N/A  
4GB(Kit of 2) DS N/A  
Heat-Sink Package 8-8-8-24(1800-8-8-8-24) 1.8  
•
•
BoxP/N:TW3X4G1800C8DF  
(CM3X2G1800C8D)Ver4.1  
CORSAIR  
Heat-Sink Package 8-8-8-24  
1.80  
•
•
KINGSTON KHX14400D3/1G  
1GB  
SS N/A  
Heat-Sink Package  
1.9  
•
•
•
•
•
•
•
•
•
•
KINGSTON KHX14400D3K2/2GN(EPP) 2GB(Kit of 2) SS N/A  
KINGSTON KHX14400D3K3/3GX(XMP) 3GB(Kit of 3) SS N/A  
Heat-Sink Package  
1.9  
•
•
Heat-Sink Package 1800-9-9-9-27  
1.65  
OCZ  
OCZ3P18002GK  
2GB(Kit of 2) SS N/A  
4GB(Kit of 2) DS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
8
8
8
OCZ  
OCZ3P18004GK  
1.9  
•
•
•
Transcend  
Patriot  
TX1800KLU-2GK(XMP)  
PVS32G1800LLKN(EPP)  
Heat-Sink Package 8-8-8-20(1066-7-7-7-20) 1.9  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1800MHz  
capability for CPU at 2.8 and 2.93GHz  
DIMM socket  
support  
Voltage  
(Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
A*  
B* C*  
Apacer  
78.0AGCD-CDZ(XMP)  
2048MB(Kit of 2) SS N/A  
4096MB(Kit of 2) DS N/A  
Heat-Sink Package 8-8-8-24(1800-8-8-8-24) 1.8  
•
•
•
BoxP/N:TW3X4G1800C8DF  
(CM3X2G1800C8D)Ver4.1  
CORSAIR  
Heat-Sink Package 8-8-8-24  
1.80  
•
KINGSTON KHX14400D3/1G  
1024MB  
SS N/A  
Heat-Sink Package  
1.9  
•
•
•
•
•
•
•
•
•
•
•
•
•
KINGSTON KHX14400D3K2/2GN(EPP) 2048MB(Kit of 2) SS N/A  
Heat-Sink Package  
1.9  
KHX14400D3K3/3GX(XMP)  
OCZ3P18002GK  
KINGSTON  
OCZ  
3072MB(Kit of 3) SS N/A  
2048MB(Kit of 2) SS N/A  
4096MB(Kit of 2) DS N/A  
2048MB(Kit of 2) SS N/A  
2048MB(Kit of 2) SS N/A  
Heat-Sink Package 1800-9-9-9-27  
1.65  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
8
8
8
OCZ  
OCZ3P18004GK  
1.9  
Transcend  
Patriot  
TX1800KLU-2GK(XMP)  
PVS32G1800LLKN(EPP)  
Heat-Sink Package 8-8-8-20(1066-7-7-7-20) 1.9  
•
2-16  
Chapter 2: Hardware information  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1866MHz  
capability for CPU at 2.66GHz  
DIMM socket  
support  
(Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
•
B*  
C*  
Apacer  
Crucial  
78.0AGCQ.CBZ(XMP)  
3GB(Kit of 3) SS N/A  
SS N/A  
Heat-Sink Package 9-9-9-27(1066-8-8-8-20)  
Heat-Sink Package 9-9-9-28(1333-9-9-9-24)  
BL12864BE2009.8SFB3(EPP) 1GB  
2
•
•
•
•
•
•
•
•
G.SKILL  
G.SKILL  
F3-16000CL7T-6GBPS(XMP) 6GB(Kit of 3) DS N/A  
F3-16000CL9T-6GBPS(XMP) 6GB(Kit of 3) DS N/A  
Heat-Sink Package 7-8-7-20(1066-8-8-8-20) 1.65  
Heat-Sink Package 9-9-9-24(1066-8-8-8-20) 1.65  
•
•
KINGSTON KHX16000D3K2/2GN(EPP)  
KINGSTON KHX16000D3K3/3GX(XMP)  
2GB(Kit of 2) SS N/A  
3GB(Kit of 3) SS N/A  
6GB(Kit 0f 3) DS N/A  
Heat-Sink Package  
2.0  
•
•
•
Heat-Sink Package 9(1333-9-9-9-24)  
Heat-Sink Package 8(1066-8-8-8-20)  
1.65  
1.65  
•
•
KINGSTON KHX16000D3ULT1K3/  
6GX(XMP)  
KINGSTON KHX16000D3T1K3/6GX(XMP) 6GB(Kit of 3) DS N/A  
Heat-Sink Package 9(1066-8-8-8-20)  
1.65  
1.9  
1.9  
1.8  
•
•
•
•
•
•
•
•
•
•
•
OCZ  
OCZ  
OCZ  
Gingle  
OCZ3FXT20002GK  
OCZ3P20002GK(EPP)  
OCZ3P2000EB2GK  
9CAASS37AZZ01D1  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
Heat-Sink Package  
Heat-Sink Package  
8
9
Heat-Sink Package 9-8-8(1066-8-7-7-20)  
Heat-Sink Package 9-9-9-24  
2BG  
DS N/A  
•
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-1866MHz  
capability for CPU at 2.8 and 2.93GHz  
DIMM socket  
support (Optional)  
Voltage  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
A*  
•
B*  
•
C*  
CORSAIR  
CORSAIR  
TR3X3G1866C9D(XMP)  
TR3X6G1866C9D  
3GB(Kit of 3) SS N/A  
6GB(Kit of 3) DS N/A  
Heat-Sink Package 9-9-9-24(1866-9-9-9-24) 1.65  
Heat-Sink Package 9-9-9-24(1866-9-9-9-24) 1.65  
•
•
•
KINGSTON KHX14900D3K3/3GX(XMP) 3GB  
SS N/A  
Heat-Sink Package 9(1333-9-9-9-24)  
Heat-Sink Package 9-9-9(1066-7-7-7-20)  
Heat-Sink Package 9-9-9(1066-7-7-7-20)  
Heat-Sink Package 8-8-8-24(1333-9-9-9-24)  
1.65  
1.65  
1.65  
•
•
OCZ  
OCZ  
OCZ3RPR1866C9LV3GK  
OCZ3RPR1866C9LV6GK  
3GB(Kit of 3) SS N/A  
6GB(Kit of 3) DS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
•
•
•
•
•
Super Talent W1866UX2GB(XMP)  
•
•
•
•
Patriot  
Patriot  
PVS32G1866LLK(XMP)  
PVS32G1866LLK(XMP)  
Heat-Sink Package 8-8-8-24(1066-7-7-7-20) 1.9  
Heat-Sink Package 8-8-8-24(1866-8-8-8-24) 1.9  
•
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-2000MHz  
capability for CPU at 2.66GHz  
DIMM socket  
support (Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
•
B*  
C*  
Apacer  
Crucial  
78.0AGCQ.CBZ(XMP)  
3GB(Kit of 3) SS N/A  
1GB SS N/A  
Heat-Sink Package 9-9-9-27(1066-8-8-8-20)  
Heat-Sink Package 9-9-9-28(1333-9-9-9-24)  
BL12864BE2009.8SFB3(EPP)  
F3-16000CL7T-6GBPS(XMP)  
F3-16000CL9T-6GBPS(XMP)  
2
•
•
•
•
•
•
•
•
•
•
•
•
•
G.SKILL  
G.SKILL  
6GB(Kit of 3) DS N/A  
6GB(Kit of 3) DS N/A  
2GB(Kit of 2) SS N/A  
3GB(Kit of 3) SS N/A  
Heat-Sink Package 7-8-7-20(1066-8-8-8-20) 1.65  
Heat-Sink Package 9-9-9-24(1066-8-8-8-20) 1.65  
•
•
KINGSTON KHX16000D3K2/2GN(EPP)  
KINGSTON KHX16000D3K3/3GX(XMP)  
Heat-Sink Package  
2.0  
•
•
•
•
Heat-Sink Package 9(1333-9-9-9-24)  
Heat-Sink Package 8(1066-8-8-8-20)  
Heat-Sink Package 9(1066-8-8-8-20)  
1.65  
1.65  
1.65  
1.9  
•
•
•
•
•
•
•
KINGSTON KHX16000D3ULT1K3/6GX(XMP) 6GB(Kit 0f 3) DS N/A  
KINGSTON KHX16000D3T1K3/6GX(XMP)  
6GB(Kit of 3) DS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
OCZ  
OCZ  
OCZ  
Gingle  
OCZ3FXT20002GK  
OCZ3P20002GK(EPP)  
OCZ3P2000EB2GK  
9CAASS37AZZ01D1  
Heat-Sink Package  
Heat-Sink Package  
8
9
1.9  
Heat-Sink Package 9-8-8(1066-8-7-7-20)  
Heat-Sink Package 9-9-9-24  
1.8  
2GB  
DS N/A  
•
ASUS P7P55D  
2-17  
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-2000MHz  
capability for CPU at 2.8 and 2.93GHz  
DIMM socket  
support  
(Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A* B* C*  
Apacer  
Crucial  
78.0AGCQ.CBZ(XMP)  
3GB(Kit of 3) SS N/A  
1GB SS N/A  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
9-9-9-27(1066-8-8-8-20)  
9-9-9-28(1333-9-9-9-24)  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
BL12864BE2009.8SFB3(EPP)  
F3-16000CL7T-6GBPS(XMP)  
F3-16000CL9T-6GBPS(XMP)  
2
•
G.SKILL  
G.SKILL  
6GB(Kit of 3) DS N/A  
6GB(Kit of 3) DS N/A  
2GB(Kit of 2) SS N/A  
3GB(Kit of 3) SS N/A  
7-8-7-20(1066-8-8-8-20) 1.65  
9-9-9-24(1066-8-8-8-20) 1.65  
2.0  
KINGSTON KHX16000D3K2/2GN(EPP)  
KINGSTON KHX16000D3K3/3GX(XMP)  
•
•
•
•
9(1333-9-9-9-24)  
8(1066-8-8-8-20)  
9(1066-8-8-8-20)  
8
1.65  
1.65  
1.65  
1.9  
KINGSTON KHX16000D3ULT1K3/6GX(XMP) 6GB(Kit 0f 3) DS N/A  
KINGSTON KHX16000D3T1K3/6GX(XMP)  
6GB(Kit of 3) DS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
2GB(Kit of 2) SS N/A  
OCZ  
OCZ3FXT20002GK  
OCZ3P20002GK(EPP)  
OCZ3P2000EB2GK  
9CAASS37AZZ01D1  
PVS32G2000LLKN  
OCZ  
9
1.9  
OCZ  
9-8-8(1066-8-7-7-20)  
9-9-9-24  
1.8  
•
•
Gingle  
Patriot  
2GB  
DS N/A  
2GB(Kit of 2) SS N/A  
9-9-9-24(1066-7-7-7-20)  
2
P7P55D Motherboard Qualified Vendors Lists (QVL) DDR3-2133MHz  
capability for CPU at 2.8 and 2.93GHz  
DIMM socket support  
(Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor Part No.  
Size  
Chip NO.  
Voltage  
A*  
B*  
C*  
G.SKILL F3-17066CL9T-6GB-T 6GB(Kit of 3) DS N/A  
Heat-Sink Package 9-9-9-24(1066-8-7-7-20) 1.65  
•
•
Side(s): SS - Single-sided DS - Double-sided  
DIMM support:  
•
•
•
A*: Supports one (1) module inserted into slot A1 or B1 as Single-channel memory  
configuration.  
B*: Supports two (2) modules inserted into the blue slots (A1 and B1) as one pair of  
Dual-channel memory configuration.  
C*: Supports four (4) modules inserted into both the blue and the black slots as two  
pairs of Dual-channel memory configuration.  
•
•
•
ASUS exclusively provides hyper DIMM support function.  
Hyper DIMM support is subject to the physical characteristics of individual CPUs.  
According to Intel spec definition, DDR3-1600 is supported for one DIMM per channel  
only. ASUS exclusively provides two DDR3-1600 DIMM support for each memory  
channel.  
•
•
According to Intel CPU spec, CPUs with a core frequency of 2.66G support the  
maximum DIMM frequency of up to DDR3-1333. To use DIMMs of a higher frequency  
with a 2.66G CPU, enable the DRAM O.C. Profile feature in BIOS. Refer to section  
3.5.3 Ai Overclock Tuner for details.  
Visit the ASUS website for the latest QVL.  
2-18  
Chapter 2: Hardware information  
2.4.3  
Installing a DIMM  
Ensure to unplug the power supply before adding or removing DIMMs or other system  
components. Failure to do so may cause severe damage to both the motherboard and the  
components.  
2
To install a DIMM  
DIMM notch  
1.  
Press the retaining clip outward to  
unlock a DIMM socket.  
2.  
Align a DIMM on the socket such that  
the notch on the DIMM matches the  
break on the socket.  
1
Unlocked retaining clip  
A DIMM is keyed with a notch so that it fits in only one direction. DO NOT force a DIMM into  
a socket to avoid damaging the DIMM.  
3.  
Firmly insert the DIMM into the socket  
until the retaining clip snaps back in  
place and the DIMM is properly seated.  
3
Locked Retaining Clip  
2.4.4  
Removing a DIMM  
To remove a DIMM  
2
1.  
Press the retaining clip outward to  
unlock the DIMM.  
1
Support the DIMM lightly with your fingers when pressing the retaining clip. The DIMM  
might get damaged when it flips out with extra force.  
2.  
Remove the DIMM from the socket.  
ASUS P7P55D  
2-19  
2.5  
Expansion slots  
In the future, you may need to install expansion cards. The following subsections describe the  
slots and the expansion cards that they support.  
Ensure to unplug the power cord before adding or removing expansion cards. Failure to do  
so may cause you physical injury and damage motherboard components.  
2.5.1  
Installing an expansion card  
To install an expansion card  
1.  
Before installing the expansion card, read the documentation that came with it and  
make the necessary hardware settings for the card.  
2.  
3.  
Remove the system unit cover (if your motherboard is already installed in a chassis).  
Remove the bracket opposite the slot that you intend to use. Keep the screw for later  
use.  
4.  
Align the card connector with the slot and press firmly until the card is completely  
seated on the slot.  
5.  
6.  
Secure the card to the chassis with the screw you removed earlier.  
Replace the system cover.  
2.5.2  
Configuring an expansion card  
After installing the expansion card, configure it by adjusting the software settings.  
1.  
Turn on the system and change the necessary BIOS settings, if any. See Chapter 3 for  
information on BIOS setup.  
2.  
3.  
Assign an IRQ to the card. Refer to the tables on the next page.  
Install the software drivers for the expansion card.  
When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that  
the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI  
groups, making the system unstable and the card inoperable. Refer to the table on the next  
page for details.  
2-20  
Chapter 2: Hardware information  
2.5.3  
Interrupt assignments  
Standard interrupt assignments  
IRQ  
0
Priority Standard function  
1
2
System Timer  
1
Keyboard Controller  
2
–
Redirect to IRQ#9  
4
12  
13  
14  
3
Communications Port (COM1)*  
IRQ Holder for PCI Steering*  
Reserved  
5
7
8
System CMOS/Real Time Clock  
IRQ Holder for PCI Steering*  
IRQ Holder for PCI Steering*  
IRQ Holder for PCI Steering*  
Reserved  
9
4
10  
11  
12  
13  
14  
5
6
7
8
Numeric Data Processor  
Primary IDE Channel  
9
* These IRQs are usually available for PCI devices.  
IRQ assignments for this motherboard  
A
shared  
–
B
C
–
–
–
–
–
–
D
–
–
–
–
–
–
E
–
–
–
–
–
F
G
H
PCIE x16_1  
PCIE x16_2  
–
–
–
–
shared  
–
–
–
USB 2.0 controller 1 shared  
–
–
–
–
–
–
–
USB 2.0 controller 2  
HD audio  
–
–
–
–
–
–
shared  
–
shared  
–
–
Onboard SATA  
shared  
ASUS P7P55D  
2-21  
2.5.4  
PCI slots  
The PCI slots support cards such as a LAN card, SCSI card, USB card, and other cards that  
comply with PCI specifications. Refer to the figure below for the location of the slot.  
2.5.5  
PCI Express x1 slots  
This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that  
comply with the PCI Express specifications. Refer to the figure below for the location of the  
slots.  
2.5.6  
PCI Express 2.0 x16 slots  
This motherboard has two PCI Express 2.0 x16 slots that support PCI Express x16 2.0  
graphic cards complying with the PCI Express specifications. Refer to the figure below for the  
location of the slots.  
PCI slot 3  
PCI slot 2  
PCI slot 1  
PCIe 2.0 x16_2 slot (black, at x4 link)  
PCI Express x1_2 slot  
PCI Express x1_1 slot  
PCIe 2.0 x16_1 slot (blue, at x16 link)  
2-22  
Chapter 2: Hardware information  
PCI Express operating mode  
PCIe x16_1  
VGA configuration  
PCIe x16_2  
x4 (PCIe card)  
x4  
x16 (Recommend for  
single VGA)  
Single VGA/PCIe card  
Dual VGA/PCIe card  
x16  
•
•
•
In single VGA card mode, use the PCIe 2.0 x16_1 slot (blue) for a PCI Express x16  
graphics card to get better performance.  
We recommend that you provide sufficient power when running CrossFireX™ mode.  
See page 2-38 for details.  
Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2 when  
using multiple graphics cards for better thermal environment. See page 2-37 for  
details.  
ASUS P7P55D  
2-23  
2.6  
Onboard switch  
Onboard switch allows you to fine-tune performance when working on a bare or open-  
case system. This is ideal for overclockers and gamers who continually change settings to  
enhance system performance.  
MemOK! switch  
Installing DIMMs that are incompatible with the motherboard may cause system boot failure,  
and the DRAM_LED near the MemOK! switch lights continuously. Press and hold the  
MemOK! switch until the DRAM_LED starts blinking to begin automatic memory compatibility  
tuning for successful boot.  
•
•
Refer to section 2.9 Onboard LEDs for the exact location of the DRAM_LED.  
The DRAM_LED also lights when the DIMM is not properly installed. Turn off the  
system and reinstall the DIMM before using the MemOK! function.  
•
•
The MemOK! switch does not function under Windows™ OS environment.  
During the tuning process, the system loads and tests failsafe memory settings. It  
takes about 30 seconds for the system to test one set of failsafe settings. If the test  
fails, the system reboots and test the next set of failsafe settings. The blinking speed  
of the DRAM_LED increases, indicating different test processes.  
•
Due to memory tuning requirement, the system automatically reboots when each  
timing set is tested. If the installed DIMMs still fail to boot after the whole tuning  
process, the DRAM_LED lights continuously. Replace the DIMMs with ones  
recommended in the Memory QVL (Qualified Vendors Lists) in this user manual or on  
the ASUS website at www.asus.com.  
•
•
•
If you turn off the computer and replace DIMMs during the tuning process, the system  
continues memory tuning after turning on the computer. To stop memory tuning, turn  
off the computer and unplug the power cord for about 5–10 seconds.  
If your system fails to boot due to BIOS overclocking, press the MemOK! switch to  
boot and load BIOS default settings. A message will appear during POST reminding  
you that the BIOS has been restored to its default settings.  
We recommend that you download and update to the latest BIOS version from the  
ASUS website at www.asus.com after using the MemOK! function.  
2-24  
Chapter 2: Hardware information  
2.7  
Jumpers  
1.  
Clear RTC RAM (3-pin CLRTC)  
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can  
clear the CMOS memory of date, time, and system setup parameters by erasing  
the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in  
CMOS, which include system setup information such as system passwords.  
To erase the RTC RAM  
1.  
2.  
Turn OFF the computer and unplug the power cord.  
Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3  
for about 5–10 seconds, then move the cap back to pins 1-2.  
3.  
4.  
Plug the power cord and turn ON the computer.  
Hold down the <Del> key during the boot process and enter BIOS setup to re-enter  
data.  
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default  
position. Removing the cap will cause system boot failure!  
•
•
If the steps above do not help, remove the onboard battery and move the jumper again  
to clear the CMOS RTC RAM data. After the CMOS clearance, reinstall the battery.  
You do not need to clear the RTC when the system hangs due to overclocking. For  
system failure due to overclocking, use the C.P.R. (CPU Parameter Recall) feature.  
Shut down and reboot the system so the BIOS can automatically reset parameter  
settings to default values.  
•
Due to the chipset behavior, AC power off is required to enable C.P.R. function. You  
must turn off and on the power supply or unplug and plug the power cord before  
rebooting the system.  
ASUS P7P55D  
2-25  
2.  
DRAM overvoltage setting (3-pin OV_DRAM)  
This jumper allows you to enable or disable the DRAM overvoltage settings in BIOS.  
OV_DRAM  
Pins 1-2 (Enable OV)  
Pins 2-3 (Default)  
up to 2.5V  
up to 2.0V  
•
•
Before you change the jumper settings for extra-high overvoltage ability, use the BIOS  
items first to adjust the desired DRAM performance. Ensure your system functions  
well under the highest BIOS voltage settings before you change the setting of the  
jumper.  
The system may need a better cooling system, such as a water cooling system, to  
maintain stability under high voltage settings.  
2-26  
Chapter 2: Hardware information  
2.8  
Connectors  
2.8.1  
Rear panel connectors  
Rear panel connectors  
1. PS/2 mouse port (green)  
2. USB 2.0 ports 7 and 8  
3. USB 2.0 ports 5 and 6  
4. USB 2.0 ports 3 and 4  
5. LAN (RJ-45) port*  
7. Optical S/PDIF Out port  
8. External SATA port  
9. IEEE 1394a port  
10. USB 2.0 ports 1 and 2  
11. Audio I/O ports**  
6. PS/2 keyboard port (purple)  
* Refer to the LAN port table on the next page.  
** Refer to the audio port definitions table on the next page.  
ASUS P7P55D  
2-27  
*LAN port LED indications  
Activity Link LED  
ACT/LINK SPEED  
LED LED  
Speed LED  
Status  
Status  
Description  
No link  
Description  
OFF  
OFF  
10 Mbps connection  
100 Mbps connection  
1 Gbps connection  
ORANGE  
BLINKING  
Linked  
ORANGE  
GREEN  
LAN port  
Data activity  
** Audio 2, 4, 6, or 8-channel configuration  
Port  
Headset  
4-channel  
6-channel  
8-channel  
2-channel  
Light Blue Line In  
Line In  
Line In  
Line In  
Lime  
Line Out  
Front Speaker Out Front Speaker Out  
Front Speaker Out  
Mic In  
Pink  
Mic In  
Mic In  
Mic In  
Orange  
Black  
Gray  
–
–
–
–
Center/Subwoofer  
Rear Speaker Out  
–
Center/Subwoofer  
Rear Speaker Out  
Side Speaker Out  
Rear Speaker Out  
–
2.8.2  
Audio I/O connections  
Audio I/O ports  
Connect to Headphone and Mic  
2-28  
Chapter 2: Hardware information  
Connect to Stereo Speakers  
Connect to 2.1 channel Speakers  
Connect to 4.1 channel Speakers  
ASUS P7P55D  
2-29  
Connect to 5.1 channel Speakers  
Connect to 7.1 channel Speakers  
2-30  
Chapter 2: Hardware information  
2.8.3  
Internal connectors  
1.  
Digital audio connector (4-1 pin SPDIF_OUT)  
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port(s).  
Connect the S/PDIF Out module cable to this connector, then install the module to a  
slot opening at the back of the system chassis.  
The S/PDIF module is purchased separately.  
2.  
Front panel audio connector (10-1 pin AAFP)  
This connector is for a chassis-mounted front panel audio I/O module that supports  
either HD Audio or legacy AC`97 audio standard. Connect one end of the front panel  
audio I/O module cable to this connector.  
•
•
We recommend that you connect a high-definition front panel audio module to this  
connector to avail of the motherboard’s high-definition audio capability.  
If you want to connect a high-definition front panel audio module to this connector, set  
the Front Panel Type item in the BIOS setup to [HD Audio]; if you want to connect an  
AC'97 front panel audio module to this connector, set the item to [AC97]. By default,  
this connector is set to [HD Audio].  
ASUS P7P55D  
2-31  
3.  
IDE connector (40-1 pin PRI_EIDE)  
The onboard IDE connector is for the Ultra DMA 133/100/66 signal cable. There are  
three connectors on each Ultra DMA 133/100/66 signal cable: blue, black, and gray.  
Connect the blue connector to the motherboard’s IDE connector, then select one of the  
following modes to configure your device.  
Drive jumper setting  
Mode of  
Cable connector  
device(s)  
Single device  
Two devices  
Cable-Select or Master  
Cable-Select  
-
Black  
Master  
Slave  
Master  
Slave  
Black  
Gray  
Master  
Slave  
Black or gray  
•
•
Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA  
cable connector. This prevents incorrect insertion when you connect the IDE cable.  
Use the 80-conductor IDE cable for Ultra DMA 133/100/66 IDE devices.  
If any device jumper is set as “Cable-Select”, ensure that all other device jumpers have the  
same setting.  
2-32  
Chapter 2: Hardware information  
4.  
Intel® P55 Serial ATA connectors (7-pin SATA 1-6)  
These connectors are for the Serial ATA signal cables for Serial ATA hard disk drives  
and optical disc drives.  
If you installed Serial ATA hard disk drives, you can create a RAID 0, 1, 5, and 10  
configuration with the Intel® Matrix Storage Technology through the onboard Intel® P55  
chipset.  
•
These connectors are set to Standard IDE mode by default. In Standard IDE mode,  
you can connect Serial ATA boot/data hard disk drives to these connectors. If you  
intend to create a Serial ATA RAID set using these connectors, set the Configure  
SATA as item in the BIOS to [RAID]. See section 3.4.2 Storage Configuration for  
details.  
•
Before creating a RAID set, refer to section 4.5 RAID configurations or the RAID  
manual bundled in the motherboard support DVD.  
•
You must install Windows® XP Service Pack 2 or later version before using Serial ATA  
hard disk drives. The Serial ATA RAID feature (RAID 0, 1, 5, and 10) is available only if  
you are using Windows® XP SP2 or later version.  
•
When using hot-plug and NCQ, set the Configure SATA as item in the BIOS to  
[AHCI]. See section 3.4.2 Storage Configuration for details.  
ASUS P7P55D  
2-33  
5.  
JMicron® JMB363 Serial ATA connector (7-pin SATA_E1)  
This connector is for the Serial ATA signal cable for Serial ATA hard disk drives and  
optical disc drives.  
2-34  
Chapter 2: Hardware information  
6.  
USB connectors (10-1 pin USB910, USB1112, USB1314)  
These connectors are for USB 2.0 ports. Connect the USB module cable to any of  
these connectors, then install the module to a slot opening at the back of the system  
chassis. These USB connectors comply with USB 2.0 specification that supports up to  
480 Mbps connection speed.  
Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard!  
You can connect the front panel USB cable to the ASUS Q-Connector (USB, blue) first, and  
then install the Q-Connector (USB) to the USB connector onboard if your chassis supports  
front panel USB ports.  
7.  
Optical drive audio connector (4-pin CD)  
These connectors allow you to receive stereo audio input from sound sources such as  
a CD-ROM, TV tuner, or MPEG card.  
ASUS P7P55D  
2-35  
8.  
IEEE 1394a port connector (10-1 pin IE1394_2)  
This connector is for an IEEE 1394a port. Connect the IEEE 1394a module cable  
to this connector, then install the module to a slot opening at the back of the system  
chassis.  
Never connect a USB cable to the IEEE 1394a connector. Doing so will damage the  
motherboard!  
The IEEE 1394a module is purchased separately.  
9.  
Serial port connector (10-1 pin COM1)  
This connector is for a serial (COM) port. Connect the serial port module cable to this  
connector, then install the module to a slot opening at the back of the system chassis.  
The COM module is purchased separately.  
2-36  
Chapter 2: Hardware information  
10. CPU, chassis, and power fan connectors  
(4-pin CPU_FAN, 4-pin CHA_FAN1, 3-pin CHA_FAN2, 3-pin PWR_FAN)  
The fan connectors support cooling fans of 350 mA~1000 mA (12 W max.) or a total  
of 1 A~4 A (84 W max.) at +12V. Connect the fan cables to the fan connectors on the  
motherboard, ensuring that the black wire of each cable matches the ground pin of the  
connector.  
PWR_FAN  
CHA_FAN1  
GND  
CHA FAN PWR  
CHA FAN IN  
+5V  
®
P7P55D  
CPU_FAN  
CHA_FAN2  
GND  
CPU FAN PWR  
CPU FAN IN  
CPU FAN PWM  
P7P55D Fan connectors  
Do not forget to connect the fan cables to the fan connectors. Insufficient air flow inside the  
system may damage the motherboard components. These are not jumpers! Do not place  
jumper caps on the fan connectors!  
•
•
Only the CPU_FAN, CHA_FAN 1, and CHA_FAN 2 connectors support the FAN Xpert  
feature.  
If you install two VGA cards, we recommend that you plug the rear chassis fan cable  
to the motherboard connector labeled CHA_FAN1 or CHA_FAN2 for better thermal  
environment.  
ASUS P7P55D  
2-37  
11. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)  
These connectors are for ATX power supply plugs. The power supply plugs are  
designed to fit these connectors in only one orientation. Find the proper orientation and  
push down firmly until the connectors completely fit.  
•
For a fully configured system, we recommend that you use a power supply unit  
(PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a  
minimum power of 600 W.  
•
Do not forget to connect the 8-pin EATX12 V power plug. Otherwise, the system will  
not boot.  
•
We recommend that you use a PSU with higher power output when configuring a  
system with more power-consuming devices. The system may become unstable or  
may not boot up if the power is inadequate.  
•
•
If you are uncertain about the minimum power supply requirement for your system,  
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.  
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.  
If you want to use two high-end PCI Express x16 cards, use a PSU with 1000W power  
or above to ensure the system stability.  
2-38  
Chapter 2: Hardware information  
12. System panel connector (20-8 pin PANEL)  
This connector supports several chassis-mounted functions.  
•
•
System power LED (2-pin PLED)  
This 2-pin connector is for the system power LED. Connect the chassis power LED  
cable to this connector. The system power LED lights up when you turn on the system  
power, and blinks when the system is in sleep mode.  
Hard disk drive activity LED (2-pin IDE_LED)  
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable  
to this connector. The IDE LED lights up or flashes when data is read from or written to  
the HDD.  
•
•
System warning speaker (4-pin SPEAKER)  
This 4-pin connector is for the chassis-mounted system warning speaker. The speaker  
allows you to hear system beeps and warnings.  
ATX power button/soft-off button (2-pin PWRSW)  
This connector is for the system power button. Pressing the power button turns the  
system on or puts the system in sleep or soft-off mode depending on the BIOS settings.  
Pressing the power switch for more than four seconds while the system is ON turns the  
system OFF.  
•
Reset button (2-pin RESET)  
This 2-pin connector is for the chassis-mounted reset button for system reboot without  
turning off the system power.  
ASUS P7P55D  
2-39  
2.8.4.  
ASUS Q-Connector (system panel)  
Use the ASUS Q-Connector to connect/disconnect the chassis front panel cables.  
To install the ASUS Q-Connector  
1.  
Connect the front panel cables to the ASUS  
Q-Connector.  
Refer to the labels on the Q-Connector to  
know the detailed pin definitions, and then  
match them to their respective front panel  
cable labels.  
The labels on the front panel cables  
may vary depending on the chassis  
model.  
2.  
Install the ASUS Q-Connector to the system  
panel connector, making sure the orientation  
matches the labels on the motherboard.  
3.  
The front panel functions are now enabled.  
The figure shows the Q-Connector is properly  
installed on the motherboard.  
2-40  
Chapter 2: Hardware information  
2.9  
Onboard LEDs  
1.  
POST State LEDs  
POST State LEDs check key components (CPU, DRAM, VGA card, and HDD) in  
sequence during motherboard booting process. If an error is found , the LED next to  
the error device will continue lighting until the problem is solved. This user-friendly  
design provides an intuitive way to locate the root problem within seconds.  
You may disable the POST State LEDs in BIOS. Refer to section 3.8.2 Boot Setting  
Configuration for details.  
2.  
Standby power LED  
The motherboard comes with a standby power LED that lights up to indicate that the  
system is ON, in sleep mode, or in soft-off mode. This is a reminder that you should  
shut down the system and unplug the power cable before removing or plugging in any  
motherboard component. The illustration below shows the location of the onboard LED.  
ASUS P7P55D  
2-41  
2.10 Starting up for the first time  
1.  
2.  
3.  
4.  
5.  
After making all the connections, replace the system case cover.  
Ensure that all switches are off.  
Connect the power cord to the power connector at the back of the system chassis.  
Connect the power cord to a power outlet that is equipped with a surge protector.  
Turn on the devices in the following order:  
a. Monitor  
b. External SCSI devices (starting with the last device on the chain)  
c. System power  
6.  
After applying power, the system power LED on the system front panel case lights up.  
For systems with ATX power supplies, the system LED lights up when you press the  
ATX power button. If your monitor complies with the “green” standards or if it has a  
“power standby” feature, the monitor LED may light up or change from orange to green  
after the system LED turns on.  
The system then runs the power-on self tests or POST. While the tests are running, the  
BIOS beeps (see the BIOS beep codes table below) or additional messages appear on  
the screen. If you do not see anything within 30 seconds from the time you turned on  
the power, the system may have failed a power-on test. Check the jumper settings and  
connections or call your retailer for assistance.  
BIOS Beep  
Description  
One short beep  
VGA detected  
Quick boot set to disabled  
No keyboard detected  
No memory detected  
One continuous beep followed by two  
short beeps then a pause (repeated)  
One continuous beep followed by three  
short beeps  
No VGA detected  
One continuous beep followed by four  
short beeps  
Hardware component failure  
7.  
At power on, hold down the <Delete> key to enter the BIOS Setup. Follow the  
instructions in Chapter 3.  
2.11 Turning off the computer  
While the system is ON, pressing the power switch for less than four seconds puts the system  
on sleep mode or soft-off mode, depending on the BIOS setting. Pressing the power switch  
for more than four seconds lets the system enter the soft-off mode regardless of the BIOS  
setting. Refer to section 3.7 Power Menu in Chapter 3 for details.  
2-42  
Chapter 2: Hardware information  
Chapter 3  
Chapter 3:  
BIOS setup  
3.1  
Knowing BIOS  
BIOS (Basic Input and Output System) stores system hardware settings such as storage  
device configuration, overclocking settings, advanced power management, and boot device  
configuration that are needed for system startup in the motherboard CMOS. In normal  
circumstances, the default BIOS settings apply to most conditions to ensure optimum  
performance. We recommend that you not change the default BIOS settings except in  
the following circumstances:  
•
•
An error message appears on the screen during the system bootup and requests you to  
run the BIOS Setup.  
You have installed a new system component that requires further BIOS settings or  
update.  
Inappropriate settings of the BIOS may result to instability or failure to boot. We strongly  
recommend that you change the BIOS settings only with the help of a trained service  
personnel.  
3.2  
Updating BIOS  
The ASUS website publishes the latest BIOS versions to provide enhancements on system  
stability, compatibility, or performance. However, BIOS updating is potentially risky. If there  
is no problem using the current version of BIOS, DO NOT manually update the BIOS.  
Inappropriate BIOS updating may result in the system’s failure to boot. Carefully follow the  
instructions of this chapter to update your BIOS if necessary.  
Visit the ASUS website (www.asus.com) to download the latest BIOS file for this  
motherboard.  
The following utilities allow you to manage and update the motherboard BIOS setup program.  
1.  
2.  
3.  
ASUS Update: Updates the BIOS in Windows® environment.  
ASUS EZ Flash 2: Updates the BIOS using a USB flash disk.  
ASUS CrashFree BIOS 3 utility: Restores the BIOS using the motherboard support  
DVD or other removable devices when the BIOS file fails or gets corrupted.  
Refer to the corresponding sections for details on these utilities.  
Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to  
restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update  
utility.  
3.2.1  
ASUS Update utility  
The ASUS Update is a utility that allows you to manage, save, and update the motherboard  
BIOS in Windows® environment. The ASUS Update utility allows you to:  
•
•
•
•
•
Save the current BIOS file  
Download the latest BIOS file from the Internet  
Update the BIOS from an updated BIOS file  
Update the BIOS directly from the Internet  
View the BIOS version information  
This utility is available in the support DVD that comes with the motherboard package.  
ASUS Update requires an Internet connection either through a network or an Internet  
Service Provider (ISP).  
ASUS P7P55D  
3-1  
Installing ASUS Update  
To install ASUS Update:  
1.  
2.  
Place the support DVD in the optical drive.  
From the Main menu, click the Utilities tab, and then click Install ASUS Update VX.XX.  
XX.  
3.  
The ASUS Update utility is copied to your system.  
Quit all Windows® applications before you update the BIOS using this utility.  
Updating the BIOS  
To update the BIOS:  
1.  
From the Windows® desktop, click Start  
> Programs > ASUS > ASUSUpdate  
> ASUSUpdate to launch the ASUS  
Update utility.  
2.  
From the dropdown list, select any of the updating process.  
Updating from the Internet  
a. Select Update BIOS from the  
Internet, and then click Next.  
3-2  
Chapter 3: BIOS setup  
b. Select the ASUS FTP site  
nearest you to avoid network  
traffic, or click Auto Select.  
Click Next.  
c. From the FTP site, select the BIOS  
version that you wish to download,  
then click Next.  
Updating from a BIOS file  
a. Select Update BIOS from a file,  
then click Next.  
ASUS P7P55D  
3-3  
b. Locate the BIOS file from the Open  
window, then click Open.  
P7P55D.ROM  
P7P55D  
3.  
Follow the onscreen instructions to complete the update process.  
The ASUS Update utility is capable of updating itself through the Internet. Always update  
the utility to avail all its features.  
Ensure to load the BIOS default settings to ensure system compatibility and stability.  
Select the Load Setup Defaults item under the Exit menu. See section 3.10 Exit Menu for  
details.  
3-4  
Chapter 3: BIOS setup  
3.2.2  
ASUS EZ Flash 2 utility  
The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based  
utility.  
Before you start using this utility, download the latest BIOS from the ASUS website at www.  
asus.com.  
To update the BIOS using EZ Flash 2  
1.  
Insert the USB flash disk that contains the latest BIOS file to the USB port, and then  
launch EZ Flash 2 in any of these two ways:  
•
•
Press <Alt> + <F2> during POST.  
Enter the BIOS setup program. Go to the Tools menu to select EZ Flash 2 and  
press <Enter> to enable it.  
Press <Tab> to switch between drives until the correct BIOS file is found.  
ASUSTek EZ Flash 2 BIOS ROM Utility V4.00  
FLASH TYPE: MXIC 25L8005  
Current ROM  
BOARD: P7P55D  
VER: 0157  
Update ROM  
BOARD: Unknown  
VER: Unknown  
DATE: 06/19/2009  
DATE: Unknown  
PATH: A:\  
A:  
Note  
[Enter] Select or Load  
[Up/Down/Home/End] Move  
[Tab] Switch  
[B] Backup  
[V] Drive Info  
[Esc] Exit  
2.  
When the correct BIOS file is found, EZ Flash 2 performs the BIOS update process  
and automatically reboots the system when done.  
•
Only a USB flash disk with FAT 32/16 format and single partition can support the  
ASUS EZ Flash 2 utility.  
•
DO NOT shut down or reset the system while updating the BIOS to prevent system  
boot failure!  
Ensure to load the BIOS default settings to ensure system compatibility and stability. Select  
the Load Setup Defaults item under the Exit menu. Refer to section 3.10 Exit Menu for  
details.  
ASUS P7P55D  
3-5  
3.2.3  
ASUS CrashFree BIOS 3 utility  
The ASUS CrashFree BIOS 3 utility is an auto recovery tool that allows you to restore the  
BIOS file when it fails or gets corrupted during the updating process. You can restore a  
corrupted BIOS file using the motherboard support DVD or a USB flash drive that contains  
the BIOS file.  
The BIOS file in the motherboard support DVD may be older than the BIOS file published  
on the ASUS official website. If you want to use the newer BIOS file, download the file at  
support.asus.com and save it to a USB flash drive.  
Recovering the BIOS  
To recover the BIOS  
1.  
Turn on the system.  
2.  
Insert the motherboard support DVD to the optical drive, or the USB flash drive  
containing the BIOS file to the USB port.  
3.  
4.  
5.  
The utility automatically checks the devices for the BIOS file. When found, the utility  
reads the BIOS file and starts flashing the corrupted BIOS file.  
Turn off the system after the utility completes the updating process and power on  
again.  
The system requires you to enter BIOS Setup to recover BIOS setting. To ensure  
system compatibility and stability, we recommend that you press <F2> to load default  
BIOS values.  
DO NOT shut down or reset the system while recovering the BIOS! Doing so can cause  
system boot failure!  
3.3  
BIOS setup program  
Use the BIOS Setup program to update the BIOS or configure its parameters. The BIOS  
screens include navigation keys and brief online help to guide you in using the BIOS Setup  
program.  
Entering BIOS Setup at startup  
To enter BIOS Setup at startup:  
•
Press <Delete> during the Power-On Self-Test (POST). If you do not press <Delete>,  
POST continues with its routines.  
Entering BIOS Setup after POST  
To enter BIOS Setup after POST:  
•
•
•
Press <Ctrl>+<Alt>+<Del> simultaneously.  
Press the reset button on the system chassis.  
Press the power button to turn the system off then back on. Do this option only if you failed  
to enter BIOS Setup using the first two options.  
3-6  
Chapter 3: BIOS setup  
Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force reset from  
a running operating system can cause damage to your data or system. We recommend to  
always shut down the system properly from the operating system.  
•
The default BIOS settings for this motherboard apply for most conditions to ensure  
optimum performance. If the system becomes unstable after changing any BIOS  
settings, load the default settings to ensure system compatibility and stability. Select  
the Load Setup Defaults item under the Exit menu. See section 3.10 Exit Menu for  
details.  
•
•
The BIOS setup screens shown in this section are for reference purposes only, and  
may not exactly match what you see on your screen.  
If the system fails to boot after changing any BIOS setting, try to clear the CMOS and  
reset the motherboard to the default value. See section 2.6 Jumpers for details.  
3.3.1  
BIOS menu screen  
Menu items  
Menu bar  
Configuration fields  
General help  
BIOS SETUP UTILITY  
Advanced Power Boot  
Main  
Ai Tweaker  
Tools  
Exit  
Use [ENTER], [TAB]  
or [SHIFT-TAB] to  
select a field.  
System Time  
System Date  
Language  
[13:51:25]  
[Wed 07/07/2009]  
[English]  
Use [+] or [-] to  
configure system Date.  
SATA1  
SATA2  
SATA3  
SATA4  
SATA5  
SATA6  
[HDT722516DLA380]  
[Not Detected]  
[ATAPI DVD DH1]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
←→ Select Screen  
Storage Configuration  
System Information  
↑↓  
+-  
Select Item  
Change Field  
Tab Select Field  
F1  
General Help  
F10 Save and Exit  
ESC Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
Sub-menu items Navigation keys  
3.3.2  
Menu bar  
The menu bar on top of the screen has the following main items:  
For changing the basic system configuration  
For changing the overclocking settings  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
For changing the advanced system settings  
For changing the advanced power management (APM) configuration  
For changing the system boot configuration  
For configuring options for special functions  
Tools  
For selecting the exit options and loading default settings  
Exit  
ASUS P7P55D  
3-7  
3.3.3  
Navigation keys  
At the bottom right corner of a menu screen are the navigation keys for that particular menu.  
Use the navigation keys to select items in the menu and change the settings.  
The navigation keys may differ from one screen to another.  
3.3.4  
Menu items  
The highlighted item on the menu bar displays the specific items for that menu. For example,  
selecting Main shows the Main menu items.  
The other items (Advanced, Power, Boot, and Exit) on the menu bar have their respective  
menu items.  
3.3.5  
Submenu items  
A solid triangle before each item on any menu screen means that the item has a submenu. To  
display the submenu, select the item and press <Enter>.  
3.3.6  
Configuration fields  
These fields show the values for the menu items. If an item is user-configurable, you can  
change the value of the field opposite the item. You cannot select an item that is not user-  
configurable.  
A configurable field is enclosed in brackets, and is highlighted when selected. To change the  
value of a field, select it then press <Enter> to display a list of options. Refer to 3.3.7 Pop-up  
window.  
3.3.7  
Pop-up window  
BIOS SETUP UTILITY  
Boot Tools Exit  
Select a menu item then press <Enter> to  
display a pop-up window with the configuration  
options for that item.  
Main  
Advanced  
Power  
Use [ENTER], [TAB] or  
[SHIFT-TAB] to select  
a field.  
Suspend Mode  
ACPI Version Features  
ACPI APIC support  
[Auto]  
[Disabled]  
[
Disabled  
Enabled  
Use [+] or [-] to  
configure system Time.  
APM Configuration  
Hardware Monitor  
3.3.8  
Scroll bar  
←→  
↑↓  
Select Screen  
Select Item  
Change Field  
Select Field  
General Help  
Save and Exit  
Exit  
+-  
Tab  
F1  
A scroll bar appears on the right side of a  
menu screen when there are items that do not  
fit on the screen. Press the Up/Down arrow  
keys or <Page Up> / <Page Down> keys to  
display the other items on the screen.  
F10  
ESC  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
Scroll bar  
Pop-up window  
3.3.9  
General help  
At the top right corner of the menu screen is a brief description of the selected item.  
3-8  
Chapter 3: BIOS setup  
3.4  
Main menu  
When you enter the BIOS Setup program, the Main menu screen appears, giving you an  
overview of the basic system information. You can also set the system time and date and  
BIOS language in this menu.  
Refer to 3.3.1 BIOS menu screen for information on the menu screen items and how to  
navigate through them.  
BIOS SETUP UTILITY  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
Tools  
Exit  
Use [ENTER], [TAB]  
or [SHIFT-TAB] to  
select a field.  
System Time  
System Date  
Language  
[13:51:25]  
[Tue 07/07/2009]  
[English]  
Use [+] or [-] to  
configure system Date.  
SATA1  
SATA2  
SATA3  
SATA4  
SATA5  
SATA6  
[HDT722516DLA380]  
[Not Detected]  
[ATAPI DVD DH1]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
←→ Select Screen  
Storage Configuration  
System Information  
↑↓  
+-  
Select Item  
Change Field  
Tab Select Field  
F1  
General Help  
F10 Save and Exit  
ESC Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
3.4.1  
SATA 1-6  
While entering Setup, the BIOS automatically detects the presence of SATA devices. There  
is a separate submenu for each SATA device. Select a device item then press <Enter> to  
display the SATA device information.  
BIOS SETUP UTILITY  
Main  
SATA 1  
Select the type  
of device connected  
to the system.  
Device  
: Hard Disk  
: HDT722516DLA380  
: 164.7GB  
Vendor  
Size  
LBA Mode  
Block Mode  
PIO Mode  
Async DMA  
Ultra DMA  
: Supported  
: 16Sectors  
: 4  
: MultiWord DMA-2  
: Ultra DMA-5  
SMART Monitoring:Supported  
Type  
[Auto]  
[Auto]  
[Auto]  
[Auto]  
[Auto]  
[Auto]  
[Enabled]  
LBA/Large Mode  
Block(Multi-Sector Transfer)M  
PIO Mode  
←→ Select Screen  
↑↓  
+-  
F1  
Select Item  
Change Field  
General Help  
DMA Mode  
SMART Monitoring  
32Bit Data Transfer  
F10 Save and Exit  
ESC Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
The BIOS automatically detects the values opposite the dimmed items (Device, Vendor, Size,  
LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and SMART monitoring). These  
values are not user-configurable.  
ASUS P7P55D  
3-9  
Type [Auto]  
Allows you to select the type of SATA drive installed.  
[Not Installed]  
[Auto]  
Select this option if no SATA drive is installed.  
Allows automatic selection of the appropriate SATA device type.  
Select this option if you are specifically configuring a CD-ROM drive.  
[CDROM]  
[ARMD]  
Select [ARMD] (ATAPI Removable Media Device) if your device is a ZIP,  
LS-120, or MO drive.  
LBA/Large Mode [Auto]  
Enables or disables the LBA (Logical Block Addressing) mode.  
[Auto]  
Select [Auto] to enable the LBA mode (Logical Block Addressing mode)  
if the device supports this mode, and if the device was not previously  
formatted with LBA mode disabled.  
[Disabled]  
Disables this function.  
Block (Multi-Sector Transfer) M [Auto]  
Enables or disables data multi-sector transfers.  
[Auto]  
When set to [Auto], the data transfer from and to the device occurs in  
multiple sectors at a time if the device supports the multi-sector transfer  
feature.  
[Disabled]  
When set to [Disabled], the data transfer from and to the device occurs one  
sector at a time.  
PIO Mode [Auto]  
[Auto] Allows automatic selection of the PIO (Programmed input/output) modes,  
which correspond to different data transfer rates.  
[0] [1] [2] [3] [4] Set the PIO mode to Mode 0, 1, 2, 3, or 4.  
DMA Mode [Auto]  
DMA (Direct Memory Access) allows your computer to transfer data to and from the hardware  
devices installed with very little CPU overhead.  
The DMA mode consists of SDMA (single-word DMA), MDMA (multi-word DMA), and UDMA  
(Ultra DMA). Setting to [Auto] allows automatic selection of the DMA mode.  
SMART Monitoring [Auto]  
[Auto]  
Allows automatic selection of S.M.A.R.T (Smart Monitoring, Analysis, and  
Reporting Technology).  
[Enabled]  
[Disabled]  
Enables the S.M.A.R.T feature.  
Disables the S.M.A.R.T feature.  
32Bit Data Transfer [Enabled]  
[Enabled]  
Sets the IDE controller to combine two 16-bit reads from the hard disk  
into a single 32-bit double word transfer to the processor. This makes  
more efficient use of the PCI bus as fewer transactions are needed for the  
transfer of a particular amount of data.  
[Disabled]  
Disables this function.  
3-10  
Chapter 3: BIOS setup  
3.4.2  
Storage Configuration  
The Storage Configuration menu allows you to configure your storage devices. Select an item  
then press <Enter> to display the submenu.  
BIOS SETUP UTILITY  
Main  
Set [Compatible Mode]  
when Legacy OS (i.e.  
WIN ME, 98, NT4.0, MS  
DOS) is used.  
Storage Configuration  
SATA Configuraton  
Configure SATA as  
[Enhanced]  
[IDE]  
Hard Disk Write Protect  
IDE Detect Time Out (Sec)  
[Disabled]  
[35]  
Set [Enhanced Mode]  
when Native OS (i.e.  
WIN2000, Win XP, Vista  
is used.  
SATA Configuration [Enhanced]  
Configuration options: [Disabled] [Compatible] [Enhanced]  
Configure SATA as [IDE]  
Sets the configuration for the Serial ATA connectors supported by the PCH chip.  
Configuration options: [IDE] [RAID] [AHCI]  
•
•
If you want to use the Serial ATA hard disk drives as Parallel ATA physical storage  
devices, keep the default setting [IDE].  
If you want the Serial ATA hard disk drives to use the Advanced Host Controller  
Interface (AHCI), set this item to [AHCI]. The AHCI allows the onboard storage driver  
to enable advanced Serial ATA features that increases storage performance on  
random workloads by allowing the drive to internally optimize the order of commands.  
•
If you want to create a RAID 0, RAID 1, RAID 5, RAID 10, or the Intel® Matrix Storage  
Technology configuration from the Serial ATA hard disk drives, set this item to [RAID].  
Hard Disk Write Protect [Disabled]  
Disables or enables device write protection. This will be effective only if the device is  
accessed through BIOS. Configuration options: [Disabled] [Enabled]  
IDE Detect Time Out (Sec) [35]  
Selects the time out value for detecting ATA/ATAPI devices. Configuration options: [0] [5] [10]  
[15] [20] [25] [30] [35]  
3.4.3  
AHCI Configuration  
This menu is the section for AHCI configuration. It appears only when you set the item  
Configure SATA as from the sub-menu of SATA Configuration to [AHCI].  
BIOS SETUP UTILITY  
Main  
AHCI Settings  
Some SATA CD/DVD in  
AHCI mode need to  
wait ready longer.  
SATA Port1 [Not Detected]  
SATA Port2 [Not Detected]  
SATA Port3 [Not Detected]  
SATA Port4 [Not Detected]  
SATA Port5 [Not Detected]  
SATA Port6 [Not Detected]  
ASUS P7P55D  
3-11  
SATA Port1–6 [XXXX]  
Displays the status of auto-detection of SATA devices.  
BIOS SETUP UTILITY  
Main  
Select the type  
of devices connected  
to the system.  
SATA Port1  
Device  
:Not Detected  
SATA Port1  
SMART Monitoring  
[Auto]  
[Enabled]  
SATA Port1 [Auto]  
Allows you to select the type of device connected to the system.  
Configuration options: [Auto] [Not Installed]  
SMART Monitoring [Enabled]  
Allows you to set the Self-Monitoring, Analysis and Reporting Technology.  
Configration options: [Disabled] [Enabled]  
3.4.4  
System Information  
This menu gives you an overview of the general system specifications. The BIOS automatically  
detects the BIOS information, CPU specification, and system memory in this menu.  
BIOS SETUP UTILITY  
Main  
BIOS Information  
BIOS Version  
: 0153  
BIOS Build Date : 06/11/09  
EC BIOS Version : MBEC-0018  
Processor  
Type  
: Genuine Intel(R) CPU @ 2.40GHz  
: 2400MHz  
Speed  
System Memory  
Usable Size  
: 1016MB  
3-12  
Chapter 3: BIOS setup  
3.5  
Ai Tweaker menu  
The Ai Tweaker menu items allow you to configure overclocking-related items.  
Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect field  
values can cause the system to malfunction.  
The configuration options for this chapter vary depending on the CPU and DIMM model you  
installed on the motherboard.  
BIOS SETUP UTILITY  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
Tools  
Exit  
Configure System Performance Settings  
Press ENTER to run the  
utility to Tuner BCLK.  
OC Tuner Utility  
OC Tuner limit Value  
Ai Overclock Tuner  
CPU Ratio Setting  
[Good Performance]  
[Auto]  
[Auto]  
Intel(R) SpeedStep(TM) Tech  
Intel(R) TurboMode Tech  
Xtreme Phase Full Power Mode  
DRAM Frequency  
[Enabled]  
[Enabled]  
[Auto]  
[Auto]  
DRAM Timing Control  
CPU Differential Amplitude  
CPU Clock Skew  
[Auto]  
[Auto]  
←→  
↑↓  
Select Screen  
Select Item  
******* Please key in numbers directly! *******  
Enter Go to Sub Screen  
CPU Voltage Mode  
Offset Voltage  
Current CPU Core Voltage  
IMC Voltage  
[Offset]  
[Auto]  
[ 1.048V]  
[Auto]  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
Scroll down to display the following items:  
Current IMC Voltage  
DRAM Voltage  
[ 1.109V]  
[Auto]  
Current DRAM Voltage  
CPU PLL Voltage  
[ 1.500V]  
[Auto]  
Current CPU PLL Voltage  
PCH Voltage  
Current PCH Voltage  
[ 1.800V]  
[Auto]  
[ 1.040V]  
[Auto]  
DRAM DATA REF Voltage on CHA  
DRAM CTRL REF Voltage on CHA  
DRAM DATA REF Voltage on CHB  
DRAM CTRL REF Voltage on CHB  
[Auto]  
[Auto]  
[Auto]  
***********************************************  
Load-Line Calibration  
CPU Spread Spectrum  
PCIE Spread Spectrum  
[Auto]  
[Auto]  
[Auto]  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
3.5.1  
OC Tuner Utility  
Press the <ENTER> key to start automatic system overclocking. The OC Tuner Utility  
automatically adjust system parameters and reboots several times for the best overclocking  
result. DO NOT shut down the power before the auto-adjustment completes.  
3.5.2  
OC Tuner limit Value [Good Performance]  
Set an auto-adjustment limit value for OC Tuner Utility.  
Configuration options: [Good Performance] [Better Performance] [Best Performance]  
[Extreme Performance]  
ASUS P7P55D  
3-13  
3.5.3  
Ai Overclock Tuner [Auto]  
Allows selection of CPU overclocking options to achieve desired CPU internal frequency.  
Select either one of the preset overclocking configuration options:  
Allows you to individually set overclocking parameters.  
Loads the optimal settings for the system.  
Manual  
Auto  
Overclocks DRAM frequency by adjusting BCLK frequency.  
D.O.C.P  
X.M.P.  
If you install memory module(s) supporting the eXtreme  
Memory Profile (X.M.P.) Technology, choose this item to set the  
profile(s) supported by your memory module(s) for optimizing  
the system performance.  
The configuration options for the following sub-item vary depending on the DIMMs you  
install on the motherboard.  
DRAM O.C. Profile [DDR3-1600MHz]  
This item appears only when you set the Ai Overclock Tuner item to [D.O.C.P.] and  
allows you to select a DRAM O.C. profile, which applies different settings to DRAM  
frequency, DRAM timing and DRAM voltage.  
Configuration options: [DDR3-1600MHz] [DDR3-1800MHz] [DDR3-1866MHz] [DDR3-  
2000MHz] [DDR3-2133MHz]  
CPU Frequency (GHz)  
DRAM Frequency  
(MHz)  
2.66  
2.8  
2.93  
1333  
Auto  
Auto  
Auto  
1600  
D.O.C.P.  
D.O.C.P.  
Auto  
Auto  
Above 1600  
D.O.C.P.  
D.O.C.P.  
•
•
When using DIMMs with a frequncy higher than the Intel® CPU spec, use this ASUS  
exclusive DRAM O.C. Profile function to overclock the DRAM.  
Adjust BCLK frequency to obtain a better performance after applying the D.O.C.P  
function.  
eXtreme Memory Profile [High Performance]  
This item appears only when you set the Ai Overclock Tuner item to [X.M.P.] and  
allows you to select the X.M.P. mode supported by your memory module.  
Configuration options: [High Performance] [High Frequency]  
To obtain the best performance of the X.M.P. DIMM or 1600MHz DIMM, install only one  
DIMM on each memory channel.  
3.5.4  
CPU Ratio Setting [Auto]  
Allows you to adjust the ratio between CPU Core Clock and BCLK Frequency. Use the <+>  
and <-> keys to adjust the value. The valid value ranges differently according to your CPU  
model.  
3-14  
Chapter 3: BIOS setup  
3.5.5  
Intel(R) SpeedStep(TM) Tech [Enabled]  
When set to [Disabled], the CPU runs at its default speed. When set to [Enabled], the CPU  
speed is controlled by the operating system. Configuration options: [Disabled] [Enabled]  
3.5.6  
Intel(R) TurboMode Tech [Enabled]  
This item appears only if you set the CPU Ratio Setting item to [Auto]. Turbo mode allows  
processor cores to run faster than marked frequency in specific condition.  
Configuration options: [Disabled] [Enabled]  
3.5.7  
Xtreme Phase Full Power Mode [Auto]  
This item appears only if you set the CPU Ratio Setting item to [Auto].  
Configuration options: [Auto] [Disabled] [Enabled]  
The following two items appear only when you set the Ai Overclock Tuner item to  
[Manual], [D.O.C.P.] or [X.M.P.].  
BCLK Frequency [XXX]  
Allows you to adjust the Internal Base Clock (BCLK). Use the <+> and <-> keys to adjust the  
value. You can also type the desired value using the numeric keypad. The values range from  
80 to 500.  
PCIE Frequency [XXX]  
Allows you to set the PCI Express frequency. Use the <+> and <-> keys to adjust the PCIE  
frequency. The values range from 100 to 200.  
3.5.8  
DRAM Frequency [Auto]  
Allows you to set the DDR3 operating frequency.  
Configuration options: [Auto] [DDR3-800MHz] [DDR3-1066MHz] [DDR3-1333MHz]  
•
•
The DRAM Frequency configuration options vary with the BCLK Frequency item  
settings.  
According to Intel CPU spec, CPUs with a core frequency of 2.66G support the  
maximum DIMM frequency of up to DDR3 1333. To use DIMMs of a higher frequency  
with a 2.66G CPU, enable the DRAM O.C. Profile feature in BIOS. Refer to section  
3.5.3 Ai Overclock Tuner for details.  
Selecting a very high DRAM frequency may cause the system to become unstable! If this  
happens, revert to the default setting.  
3.5.9.  
DRAM Timing Control [Auto]  
The items in this menu allow you to set the DRAM timing control features.  
The configuration options for some of the following items vary depending on thee DIMMs  
you install on the motherboard.  
ASUS P7P55D  
3-15  
1st Information: 7-7-7-20-4-59-8-6-20  
The values vary depending on your settings of the following sub-items:  
DRAM CAS# Latency [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [10 DRAM Clock] [11  
DRAM Clock]  
DRAM RAS# to CAS# Delay [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [9 DRAM Clock] [10  
DRAM Clock]  
DRAM RAS# PRE Time [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [9 DRAM Clock] [10  
DRAM Clock]  
DRAM RAS# ACT Time [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [32 DRAM Clock] [31  
DRAM Clock]  
DRAM RAS# to RAS# Delay [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [7 DRAM Clock]  
DRAM REF Cycle Time [Auto]  
Configuration options: [Auto] [30 DRAM Clock] [36 DRAM Clock]  
[48 DRAM Clock] [60 DRAM Clock] [72 DRAM Clock] [82 DRAM Clock]  
[88 DRAM Clock] [90 DRAM Clock] [100 DRAM Clock] [110 DRAM Clock]  
DRAM WRITE Recovery Time [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]  
DRAM READ to PRE Time [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]  
DRAM FOUR ACT WIN Time [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [63 DRAM Clock]  
2nd Information: 1N-44-0  
The values vary depending on your settings of the following sub-items:  
DRAM Timing Mode [Auto]  
Configuration options: [Auto] [1N] [2N] [3N]  
DRAM Round Trip Latency on CHA/B [Auto]  
[Auto] [Advance 15 Clock] – [Advance 1 Clock] [Normal]  
[Delay 1 Clock] – [Delay 15 Clock]  
3rd Information: 6-6-14-9-9-9-7-6-4-7-7-4  
The values vary depending on your settings of the following sub-items:  
DRAM WRITE to READ Delay(DD) [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [8 DRAM Clock]  
3-16  
Chapter 3: BIOS setup  
DRAM WRITE to READ Delay(DR) [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [8 DRAM Clock]  
DRAM WRITE to READ Delay(SR) [Auto]  
Configuration options: [Auto] [10 DRAM Clock] – [22 DRAM Clock]  
DRAM READ to WRITE Delay(DD) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [14 DRAM Clock]  
DRAM READ to WRITE Delay(DR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [14 DRAM Clock]  
DRAM READ to WRITE Delay(SR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [14 DRAM Clock]  
DRAM READ to READ Delay(DD) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
DRAM READ to READ Delay(DR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
DRAM READ to READ Delay(SR) [Auto]  
Configuration options: [Auto] [4 DRAM Clock] [6 DRAM Clock]  
DRAM WRITE to WRITE Delay(DD) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
DRAM WRITE to WRITE Delay(DR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
DRAM WRITE to WRITE Delay(SR) [Auto]  
Configuration options: [Auto] [4 DRAM Clock] [6 DRAM Clock]  
3.5.10  
CPU Differential Amplitude [Auto]  
Different AMP might enhance BCLK overclocking ability.  
Configuration options: [Auto] [700mV] [800mV] [900mV] [1000mV]  
3.5.11  
CPU Clock Skew [Auto]  
Adjusting this item may help enhancing BCLK overclocking ability. You may need to adjust  
the NB Clock Skew item at the same time.  
Configuration options: [Auto] [Normal] [Delay 100ps]–[Delay 1500ps]  
The following ten (10) items are adjusted by typing the desired values using the numeric  
keypad and press the <Enter> key. You can also use the <+> and <-> keys to adjust the  
value. To restore the default setting, type [auto] using the keyboard and press the <Enter>  
key.  
3.5.12  
CPU Voltage Mode [Offset]  
Allows you to set the CPU Voltage Mode. Different sub-items appear according to the CPU  
Voltage Mode item setting. Configuration options: [Offset] [Manual]  
ASUS P7P55D  
3-17  
Offset Voltage [Auto]  
This item appears only when you set the CPU Voltage Mode item to [Offset] and allows you  
to set the Offset voltage. The values range from 0.00625V to 0.50000V with a 0.00625V  
interval.  
Offset Sign [-]  
This item appears only when you set the Offset Voltage item to a value other than [Auto].  
[+]  
[–]  
To offset the voltage by a positive value.  
To offset the voltage by a negative value.  
Fixed Voltage [Auto]  
This item appears only whne you set the CPU Voltage Mode item to [Manual] and allows you  
to set a fixed CPU voltage. The values range from 0.85V to 1.70V with a 0.00625V interval.  
Refer to the CPU documentation before setting the CPU Vcore voltage. Setting a high  
VCore voltage may damage the CPU permanently, and setting a low VCore voltage may  
make the system unstable.  
3.5.13  
IMC Voltage [Auto]  
Allows you to set the CPU Integrated Memory Controller voltage. The values range from 1.1V  
to 1.7 with a 0.0125V interval.  
3.5.14  
DRAM Voltage [Auto]  
Allows you to set the DRAM voltage. The values range from 1.5V to 2.5V* with a 0.0125V  
interval.  
•
•
The value [2.5V] of the DRAM Voltage item is supported only if the OV_DRAM switch  
is enabled. Otherwise the maximum voltage supported is [2.0V]. This item can be  
automatically optimized if you install a XMP DIMM. See 2. DRAM overvoltage setting  
on page 2-26 for details.  
According to Intel CPU spec, DIMMs with voltage requirement over 1.65V may  
damage the CPU permanently. We recommend you install the DIMMs with the voltage  
requirement below 1.65V.  
3.5.15  
CPU PLL Voltage [Auto]  
Allows you to set the CPU PLL voltage. The values range from 1.8V to 2.1V with a 0.1V  
interval.  
3.5.16  
PCH Voltage [Auto]  
Allows you to set the Platform Controller Hub voltage. The values range from 1.05V to 1.15V  
with a 0.10V interval.  
•
The values of the IMC Voltage, DRAM Voltage, and CPU PLL Voltage items are  
labeled in different color, indicating the risk levels of high voltage settings. Refer to the  
table below for details.  
•
The system may need better cooling system to work stably under high voltage  
settings.  
3-18  
Chapter 3: BIOS setup  
Blue  
Yellow  
Purple  
Red  
1.10000V–  
1.16875V  
1.17500V–  
1.22500V  
1.23125V–  
1.30000V  
1.30625V–  
1.70000V  
IMC Voltage  
1.5000V–  
1.5625V  
1.5750V–  
1.6250V  
1.6375V–  
1.6875V  
1.7000V–  
2.5000V  
DRAM Voltage  
CPU PLL Voltage  
1.80V–1.90V  
2.00V–2.10V  
N/A  
N/A  
3.5.17  
DRAM DATA REF Voltage on CHA/B [Auto]  
Allows you to set the DRAM DATA Reference Voltage on Channel A/B/C. The values  
range from 0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM  
overclocking ability.  
3.5.18  
DRAM CTRL REF Voltage on CHA/B [Auto]  
Allows you to set the DRAM Control Reference Voltage on Channel A/B/C. The values  
range from 0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM  
overclocking ability.  
3.5.19  
Load-Line Calibration [Auto]  
[Auto]  
Automatic configuration.  
[Disabled]  
[Enabled]  
Follow Intel specifications.  
Improve CPU VDroop directly.  
3.5.20  
CPU Spread Spectrum [Auto]  
[Auto]  
Automatic configuration.  
[Disabled]  
[Enabled]  
Enhances the BCLK overclocking ability.  
Sets to [Enabled] for EMI control.  
3.5.21  
PCIE Spread Spectrum [Auto]  
[Auto]  
Automatic configuration.  
[Disabled]  
[Enabled]  
Enhances the PCIE overclocking ability.  
Sets to [Enabled] for EMI control.  
ASUS P7P55D  
3-19  
3.6  
Advanced menu  
The Advanced menu items allow you to change the settings for the CPU and other system  
devices.  
Be cautious when changing the settings of the Advanced menu items. Incorrect field values  
can cause the system to malfunction.  
BIOS SETUP UTILITY  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
Tools  
Exit  
Configure CPU.  
CPU Configuration  
North Bridge Configuration  
Onboard Devices Configuration  
USB Configuration  
PCIPnP  
Intel VT-d Configuration  
T.Probe  
[Enabled]  
←→  
↑↓  
Select Screen  
Select Item  
Enter Go to Sub Screen  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
3.6.1  
CPU Configuration  
The items in this menu show the CPU-related information that the BIOS automatically  
detects.  
The items shown in this screen may be different due to the CPU you installed.  
BIOS SETUP UTILITY  
Advanced  
Configure advanced CPU settings  
Sets the ratio between  
CPU Core Clock and the  
FSB Frequency.  
NOTE: If an invalid  
ratio is set in CMOS  
then actual and  
setpoint values may  
differ.  
Module Version:01.04  
Manufacturer:Intel  
Brand String:Genuine Intel(R) CPU  
Frequency  
:2.66GHz  
BCLK Speed :133MHz  
Cache L1  
Cache L2  
Cache L3  
:128 KB  
:1024 KB  
:8192 KB  
NOTE: Please key in  
ratio numbers directly  
Ratio Status:Unlocked (Min:09, Max:20)  
Ratio Actual Value:20  
CPU Ratio Setting  
[Auto]  
←→  
↑↓  
F1  
F10  
ESC  
Select Screen  
Select Item  
General Help  
Save and Exit  
Exit  
C1E Support  
[Enabled]  
[Enabled]  
[Enabled]  
[Disabled]  
[Enabled]  
[Enabled]  
Hardware Prefetcher  
Adjacent Cache Line Prefetch  
Max CPUID Value Limit  
Intel(R) Virtualization Tech  
CPU TM function  
Scroll down to display the following items:  
Execute-Disable Bit  
Intel(R) HT Technology  
Active Processor Cores  
A20M  
Intel(R) SpeedStep(TM) Tech  
Intel(R) Turbo Mode tech  
Intel(R) C-STATE Tech  
[Enabled]  
[Enabled]  
[All]  
[Disabled]  
[Enabled]  
[Enabled]  
[Disabled]  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
3-20  
Chapter 3: BIOS setup  
CPU Ratio Setting [Auto]  
Allows you to adjust the ratio between CPU Core Clock and BCLK Frequency. Use the <+>  
and <-> keys to adjust the value. The valid value ranges differently according to your CPU  
model.  
C1E Support [Enabled]  
[Enabled]  
Enables the C1E support function. This item should be enabled in order to  
enable the Enhanced Halt Sate.  
[Disabled]  
Disables this function.  
Hardware Prefetcher [Enabled]  
[Enabled]  
Enables the Hardware Prefetcher function. This item should be enabled  
in order to enable the L2 cache (MLC) Streamer Prefetcher for tuning  
performance of the specific application.  
[Disabled]  
Disables this function.  
Adjacent Cache Line Prefetcher [Enabled]  
[Enabled]  
Enables the Adjacent Cache Line Prefetcher function. This item should be  
enabled in order to enable the L2 cache (MLC) Spatial Prefetcher for tuning  
performance of the specific application.  
[Disabled]  
Disables this function.  
Max CPUID Value Limit [Disabled]  
[Enabled]  
Allows legacy operating systems to boot even without support for CPUs  
with extended CPUID functions.  
[Disabled]  
Disables this function.  
Intel(R) Virtualization Tech [Enabled]  
[Enabled]  
Allows a hardware platform to run multiple operating systems separately  
and simultaneously, enabling one system to virtually function as several  
systems.  
[Disabled]  
Disables this function.  
CPU TM function [Enabled]  
[Enabled]  
[Disabled]  
Enables the overheated CPU to throttle its clock speed to cool down.  
Disables this function.  
Execute Disable Bit [Enabled]  
[Enabled]  
Enables the No-Execution Page Protection Technology.  
Forces the XD feature flag to always return to zero (0).  
[Disabled]  
Intel(R) HT Technology [Enabled]  
[Enabled]  
[Disabled]  
Enables the Intel Hyper-Threading Technology.  
Only one thread per activated CPU core is enabled.  
ASUS P7P55D  
3-21  
Active Processor Cores [All]  
[All]  
[1]  
Activate all CPU cores in the processor package.  
Activate only 1 CPU core in the processor package.  
Activate 2 CPU cores in the processor package.  
[2]  
A20M [Disabled]  
[Enabled]  
[Disabled]  
Legacy OSes and APs may need this function enabled.  
Disables this function.  
Intel(R) SpeedStep (TM) Tech [Enabled]  
[Enabled]  
[Disabled]  
The CPU speed is controlled by the operating system.  
The CPU runs at its default speed.  
Intel(R) TurboMode tech [Enabled]  
[Enabled]  
Allows processor cores to run faster than marked frequency in specific  
condition.  
[Disabled]  
Disables this function.  
Intel(R) C-STATE Tech [Disabled]  
[Enabled]  
Allows the CPU to save more power under idle mode. Enable this item only  
when you install a C-State Technology-supported CPU.  
[Disabled]  
Disables this function.  
C State package limit setting [Auto]  
This item appears only when you set the Intel(R) C-STATE Tech item to [Enabled]. We  
recommend that you set this item to [Auto] for BIOS to automatically detect the C-State mode  
supported by your CPU. Configuration options: [Auto] [C1] [C3] [C6] [C7]  
3.6.2  
North Bridge Configuration  
The North Bridge menu allows you to change the advanced chipset settings.  
BIOS SETUP UTILITY  
Advanced  
ENABLE: Allow  
North Bridge Chipset Configuration  
remapping of  
IMC Type : Havendale  
overlapped PCI memory  
above the total  
physical memory.  
Memory Remap Feature  
[Enabled]  
PCI MMIO Allocation: 4GB To 3072MB  
DISABLE: Do not allow  
remapping of memory.  
Memory Remap Feature [Enabled]  
[Disabled] Do not allow remapping of memory.  
[Enabled] Allows for the segment of system memory that was previously overwritten  
by PCI devices to be remapped above the total physical memory.  
3-22  
Chapter 3: BIOS setup  
3.6.3  
Onboard Device Configuration  
BIOS SETUP UTILITY  
Advanced  
Onboard Devices Configuration  
Options  
HDA Controller  
[Enabled]  
[HD Audio]  
[Enabled]  
[Disabled]  
[Enabled]  
Front Panel Type  
Realtek LAN  
Enabled  
Disabled  
LAN Boot ROM  
Onboard 1394 Controller  
J-Micron eSATA/PATA Controller [IDE Mode]  
Serial Port1 Address  
[3F8/IRQ4]  
HDA Controller [Enabled]  
[Enabled]  
Enables the High Definition Audio Controller.  
[Disabled]  
Disables the controller.  
Front Panel Type [HD Audio]  
[AC97] Set the front panel audio connector (AAFP) mode to legacy AC’97  
[HD Audio] Set the front panel audio connector (AAFP) mode to high-definition audio.  
Realtek LAN [Enabled]  
[Enabled]  
[Disabled]  
Enables Realtek LAN Controller.  
Disables Realtek LAN Controller.  
LAN Boot ROM [Disabled]  
This item appears only when you enable the previous item(s).  
[Disabled] Disables Realtek LAN Boot ROM.  
[Enabled] Enables Realtek LAN Boot ROM.  
Onboard 1394 Controller [Enabled]  
[Enabled]  
[Disabled]  
Enables the onboard 1394 Controller.  
Disables the controller.  
J-Micron eSATA/PATA Controller [IDE]  
[Disabled]  
Disables the J-Micron controller.  
[IDE Mode]  
Set to [IDE Mode] when you want to use the Serial ATA hard disk drives as  
Parallel ATA physical storage devices.  
[AHCI Mode]  
Set to [AHCI] when you want the SATA hard disk drives to use the AHCI  
(Advabced Host Controller Interface). The AHCI allows the onboard storage  
driver to enable advanced Serial ATA features that increases storage  
performance on random workloads by allowing the drive to internally  
optimize the order of commands.  
Serial Port1 Address [3F8/IRQ4]  
Allows you to select the Serial Port1 base address.  
Configuration options: [Disabled] [3F8/IRQ4] [2F8/IRQ3] [3E8/IRQ4] [2E8/IRQ3]  
ASUS P7P55D  
3-23  
3.6.4  
USB Configuration  
The items in this menu allows you to change the USB-related features. Select an item then  
press <Enter> to display the configuration options.  
BIOS SETUP UTILITY  
Advanced  
USB Configuration  
Options  
Module Version - 2.24.3-13.4  
Disabled  
Enabled  
USB Devices Enabled:  
2 Hubs  
USB Functions  
Legacy USB Support  
BIOS EHCI Hand-Off  
[Enabled]  
[Auto]  
[Enabled]  
The USB Devices Enabled item shows the auto-detected values. If no USB device is  
detected, the item shows None.  
USB Support [Enabled]  
[Enabled]  
[Disabled]  
Enables the USB Host Controllers.  
Disables the controllers.  
The following items appear only when you set USB Support to [Enabled].  
Legacy USB Support [Enabled]  
[Disabled]  
[Enabled]  
[Auto]  
Disables the function.  
Enables the support for USB devices on legacy operating systems (OS).  
Allows the system to detect the presence of USB devices at startup. If  
detected, the USB controller legacy mode is enabled. If no USB device is  
detected, the legacy USB support is disabled.  
BIOS EHCI Hand-off [Enabled]  
[Disabled]  
[Enabled]  
Disables the function.  
Enables the support for operating systems without an EHCI hand-off  
feature.  
3-24  
Chapter 3: BIOS setup  
3.6.5  
PCIPnP  
The PCIPnP menu items allow you to change the advanced settings for PCI/PnP devices.  
BIOS SETUP UTILITY  
Advanced  
Advanced PCI/PnP Settings  
NO: lets the BIOS  
configure all the  
devices in the  
system.  
WARNING: Setting wrong values in below sections  
may cause system to malfunction.  
Plug And Play O/S  
[No]  
Plug And Play O/S [No]  
[Yes]  
When set to [Yes] and if you install a Plug and Play operating system, the  
operating system configures the Plug and Play devices not required for  
boot.  
[No]  
When set to [No], BIOS configures all the devices in the system.  
3.6.6  
Intel VT-d Configuration [Disabled]  
[Disabled]  
[Enabled]  
Disables the Intel Virtualization Technology for Directed I/O.  
Enables the Intel Virtualization Technology for Directed I/O.  
3.6.7  
T.Probe [Enabled]  
[Disabled]  
Disables the T.Probe Functions.  
[Enabled]  
Enables the T.Probe Functions that detect and equalize the temperature of  
vCore power components.  
3.7  
Power menu  
The Power menu items allow you to change the settings for the Advanced Power  
Management (APM). Select an item then press <Enter> to display the configuration options.  
BIOS SETUP UTILITY  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
Tools  
Exit  
Select the ACPI state  
used for System  
Suspend.  
Suspend Mode  
[Auto]  
[No]  
[Disabled]  
[Enabled]  
[Disabled]  
Repost Video on S3 Resume  
ACPI 2.0 Support  
ACPI APIC Support  
EuP Ready  
APM Configuration  
Hardware Monitor  
←→  
↑↓  
+-  
F1  
F10  
ESC  
Select Screen  
Select Item  
Change Option  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
ASUS P7P55D  
3-25  
3.7.1  
Suspend Mode [Auto]  
Allows you to select the Advanced Configuration and Power Interface (ACPI) state to be used  
for system suspend.  
[S1 (POS) only] Sets the APCI suspend mode to S1/POS (Power On Suspend).  
[S3 only]  
Sets the APCI suspend mode to S3/STR (Suspend To RAM).  
[Auto]  
The system automatically configures the ACPI suspend mode.  
3.7.2  
Repost Video on S3 Resume [No]  
Determines whether to invoke VGA BIOS POST on S3/STR resume.  
[No]  
The system will not invoke VGA BIOS POST on S3/STR resume.  
The system invokes VGA BIOS POST on S3/STR resume.  
[Yes]  
3.7.3  
ACPI 2.0 Support [Disabled]  
[Disabled]  
When set to [Disabled], the system will not add additional tables as per  
ACPI 2.0 specifications.  
[Enabled]  
When set to [Enabled], the system adds additional tables as per ACPI 2.0  
specifications.  
3.7.4  
ACPI APIC Support [Enabled]  
[Disabled]  
When set to [Disabled], the system disable the Advanced Configuration and  
Power Interface (ACPI) support in the Advanced Programmable Interrupt  
Controller (APIC).  
[Enabled]  
When set to [Enabled], the ACPI APIC table pointer is included in the RSDT  
pointer list.  
3.7.5  
EuP Ready [Disabled]  
[Disabled]  
[Enabled]  
Disables the Energy Using Products (EuP) Ready function.  
Allows the BIOS to switch off power for WOL, WO_USB, audio, and  
onboard LEDs at S5 state to get the system ready for the EuP requirement.  
3-26  
Chapter 3: BIOS setup  
3.7.6  
APM Configuration  
BIOS SETUP UTILITY  
Power  
APM Configuration  
<Enter> to select  
whether or not to  
restart the system  
after AC power loss.  
Restore on AC Power Loss  
Power On By RTC Alarm  
Power On By External Modems  
Power On By PCI Devices  
Power On By PCIE Devices  
Power On By PS/2 Keyboard  
Power On By PS/2 Mouse  
[Power Off]  
[Disabled]  
[Disalbed]  
[Disabled]  
[Disabled]  
[Disabled]  
[Disabled]  
Restore On AC Power Loss [Power Off]  
[Power Off]  
[Power On]  
[Last State]  
The system goes into off state after an AC power loss.  
The system goes into on state after an AC power loss.  
The system goes into either off or on state, whatever the system state was  
before the AC power loss.  
Power On By RTC Alarm [Disabled]  
[Disabled]  
[Enabled]  
Disables RTC to generate a wake event.  
When set to [Enabled], the items RTC Alarm Date (Days) / System Time  
will become user-configurable with set values.  
Power On By External Modems [Disabled]  
[Disabled]  
Disables to power up the computer when the external modem receives a  
call while the computer is in Soft-off mode.  
[Enabled]  
The computer could be powered up when the external modem receives a  
call while the computer is in Soft-off mode.  
The computer cannot receive or transmit data until the computer and applications are fully  
running. Thus, connection cannot be made on the first try. Turning an external modem  
off and then back on while the computer is off causes an initialization string that turns the  
system power on.  
Power On By PCI Devices [Disabled]  
[Disabled]  
[Enabled]  
Disables the PME to wake up from S5 by PCI devices.  
Allows you to turn on the system through a PCI LAN or modem card. This  
feature requires an ATX power supply that provides at least 1A on the  
+5VSB lead.  
Power On By PCIE Devices [Disabled]  
Allows you to enable or disable the PCIE devices to generate a wake event.  
[Disabled]  
[Enabled]  
Disables the PCIE devices to generate a wake event.  
Enables the PCIE devices to generate a wake event.  
Power On By PS/2 Keyboard [Disabled]  
[Disabled]  
Disables the Power On by a PS/2 keyboard.  
[Enabled]  
Sets specific keys on the PS/2 keyboard to turn on the system. This feature  
requires an ATX power supply that provides at least 1A on the +5VSB lead.  
ASUS P7P55D  
3-27  
Power On By PS/2 Mouse [Disabled]  
[Disabled]  
[Enabled]  
Disables the Power On by a PS/2 mouse.  
Enables the Power On by a PS/2 mouse. This feature requires an ATX  
power supply that provides at least 1A on the +5VSB lead.  
3.7.7  
Hardware Monitor  
BIOS SETUP UTILITY  
Power  
Hardware Monitor  
CPU Temperature(PECI)  
CPU Temperature  
MB Temperature  
[35ºC/95ºF]  
[34ºC/93ºF]  
CPU Fan Speed  
CPU Q-Fan Control  
[3590RPM]  
[Disabled]  
Chassis Fan 1 Speed  
Chassis Fan 2 Speed  
Chassis Q-Fan Control  
[N/A]  
[N/A]  
[Disabled]  
Power Fan Speed  
[N/A]  
CPU  
Voltage  
[ 1.040V]  
[ 3.008V]  
[ 4.776V]  
[11.648V]  
3.3V Voltage  
5V  
12V  
Voltage  
Voltage  
CPU/MB Temperature [xxxºC/xxxºF]  
The onboard hardware monitor automatically detects and displays the CPU and motherboard  
temperatures. Select Ignored if you do not wish to display the detected temperatures.  
CPU Fan Speed [xxxxRPM] or [Ignored] / [N/A]  
Chassis Fan 1/2 Speed [xxxxRPM] or [Ignored] / [N/A]  
Power Fan Speed [xxxxRPM] or [Ignored] / [N/A]  
The onboard hardware monitor automatically detects and displays the CPU, chassis,  
and power fan speed in rotations per minute (RPM). If the fan is not connected to the  
motherboard, the field shows N/A. Select Ignored if you do not wish to display the detected  
speed.  
CPU Q-Fan Control [Disabled]  
[Disabled]  
[Enabled]  
Disables the CPU Q-Fan control feature.  
Enables the CPU Q-Fan control feature.  
CPU Fan Profile [Standard]  
This item appears only when you enable the CPU Q-Fan Control feature and allows  
you to set the appropriate performance level of the CPU fan.  
[Standard] Sets to [Standard] to make the CPU fan automatically adjust depending on  
the CPU temperature.  
[Silent]  
Sets to [Silent] to minimize the fan speed for quiet CPU fan operation.  
[Turbo]  
Set to [Turbo] to achieve maximum CPU fan speed.  
3-28  
Chapter 3: BIOS setup  
Chassis Q-Fan Control [Disabled]  
[Disabled]  
[Enabled]  
Disables the Chassis Q-Fan control feature.  
Enables the Chassis Q-Fan control feature.  
Chassis Fan Profile [Standard]  
This item appears only when you enable the Chassis Q-Fan Control feature and  
allows you to set the appropriate performance level of the chassis fan.  
[Standard] Sets to [Standard] to make the chassis fan automatically adjust depending  
on the chassis temperature.  
[Silent]  
Sets to [Silent] to minimize the fan speed for quiet chassis fan operation.  
[Turbo]  
Set to [Turbo] to achieve maximum chassis fan speed.  
CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage  
The onboard hardware monitor automatically detects the voltage output through the onboard  
voltage regulators. Select Ignored if you do not want to detect this item.  
3.8  
Boot menu  
The Boot menu items allow you to change the system boot options. Select an item then press  
<Enter> to display the submenu.  
BIOS SETUP UTILITY  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
Tools  
Exit  
Specifies the Boot  
Device Priority  
sequence.  
Boot Settings  
Boot Device Priority  
Boot Settings Configuration  
Security  
A virtual floppy disk  
drive (Floppy Drive B:  
) may appear when you  
set the CD-ROM drive  
as the first boot  
device.  
←→  
↑↓  
Select Screen  
Select Item  
Enter Go to Sub Screen  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
3.8.1  
Boot Device Priority  
BIOS SETUP UTILITY  
Boot  
Boot Device Priority  
Specifies the boot  
sequence from the  
available devices.  
1st Boot Device  
2nd Boot Device  
3rd Boot Device  
[Removable Dev.]  
[Hard Drive]  
[ATAPI DVD-ROM]  
1st ~ xxth Boot Device [Removable Dev.]  
These items specify the boot device priority sequence from the available devices. The  
number of device items that appears on the screen depends on the number of devices  
installed in the system.  
Configuration options: [Removable Dev.] [Hard Drive] [ATAPI CD-ROM] [Disabled]  
ASUS P7P55D  
3-29  
3.8.2  
Boot Settings Configuration  
BIOS SETUP UTILITY  
Boot  
Boot Settings Configuration  
Allows BIOS to skip  
certain tests while  
booting. This will  
decrease the time  
needed to boot the  
system.  
Quick Boot  
Full Screen Logo  
AddOn ROM Display Mode  
Bootup Num-Lock  
Wait For ‘F1’ If Error  
Hit ‘DEL’ Message Display  
POST State LEDs  
[Enabled]  
[Enabled]  
[Force BIOS]  
[On]  
[Enabled]  
[Enabled]  
[Enabled]  
Quick Boot [Enabled]  
[Disabled]  
[Enabled]  
When set to [Disabled], BIOS performs all the POST items.  
When set to [Enabled], BIOS skips some power on self tests (POST) while  
booting to decrease the time needed to boot the system.  
Full Screen Logo [Enabled]  
[Disabled]  
[Enabled]  
Disables the full screen logo display feature.  
Enables the full screen logo display feature.  
Set this item to [Enabled] to use the ASUS MyLogo 2™ feature.  
AddOn ROM Display Mode [Force BIOS]  
[Force BIOS] The third-party ROM messages will be forced to display during the boot  
sequence.  
[Keep Current] The third-party ROM messages will be displayed only if the third-party  
manufacturer had set the add-on device to do so.  
Bootup Num-Lock [On]  
[Off]  
[On]  
Sets the power-on state of the NumLock to [Off].  
Sets the power-on state of the NumLock to [On].  
Wait For ‘F1’ If Error [Enabled]  
[Disabled]  
[Enabled]  
Disables this function.  
The system waits for the <F1> key to be pressed when error occurs.  
Hit ‘DEL’ Message Display [Enabled]  
[Disabled]  
[Enabled]  
Disables this function.  
The system displays the message “Press DEL to run Setup” during POST.  
POST State LEDs [Enabled]  
[Enabled]  
[Disabled]  
Turn on onboard device LEDs in the order of the device POST sequence.  
Disables this function.  
3-30  
Chapter 3: BIOS setup  
3.8.3  
Security  
The Security menu items allow you to change the system security settings. Select an item  
then press <Enter> to display the configuration options.  
BIOS SETUP UTILITY  
Boot  
Security Settings  
<Enter> to change  
password.  
<Enter> again to  
disable password.  
Supervisor Password  
User Password  
: Not Installed  
: Not Installed  
Change Supervisor Password  
Change User Passward  
Change Supervisor Password  
Select this item to set or change the supervisor password. The Supervisor Password item  
on top of the screen shows the default Not Installed. After you set a password, this item  
shows Installed.  
To set a Supervisor Password:  
1.  
2.  
Select the Change Supervisor Password item and press <Enter>.  
In the password box, key in a password containing up to six letters or numbers, or both,  
then press <Enter>.  
3.  
Confirm the password when prompted.  
The message Password Installed appears after you successfully set your password.  
To change the supervisor password, follow the same steps as in setting a user password.  
To clear the supervisor password, select the Change Supervisor Password then press  
<Enter>. The message Password Uninstalled appears.  
If you forget your BIOS password, you can clear clear it by erasing the CMOS Real Time  
Clock (RTC) RAM. See section 2.6 Jumpers for information on how to erase the RTC  
RAM.  
After you have set a supervisor password, the other items appear to allow you to change  
other security settings.  
ASUS P7P55D  
3-31  
BIOS SETUP UTILITY  
Boot  
Security Settings  
<Enter> to change  
password.  
<Enter> again to  
disabled password.  
Supervisor Password  
User Password  
: Installed  
: Installed  
Change Supervisor Password  
User Access Level  
Change User Password  
Clear User Password  
Password Check  
[Full Access]  
[Setup]  
User Access Level [Full Access]  
This item allows you to select the access restriction to the Setup items.  
[No Access]  
[View Only]  
[Limited]  
Prevents user access to the Setup utility.  
Allows access but does not allow change to any field.  
Allows changes only to selected fields, such as Date and Time.  
Allows viewing and changing all the fields in the Setup utility.  
[Full Access]  
Change User Password  
Select this item to set or change the user password. The User Password item on top of the  
screen shows the default Not Installed. After you set a password, this item shows Installed.  
To set a User Password:  
1.  
2.  
Select the Change User Password item and press <Enter>.  
In the password box, key in a password containing up to six letters or numbers, or  
both, then press <Enter>.  
3.  
Confirm the password when prompted.  
The message Password Installed appears after you set your password successfully.  
To change the user password, follow the same steps as in setting a user password.  
Clear User Password  
Select this item to clear the user password.  
Password Check [Setup]  
[Setup]  
BIOS checks for user password when accessing the Setup utility.  
[Always]  
BIOS checks for user password both when accessing Setup and booting  
the system.  
3-32  
Chapter 3: BIOS setup  
3.9  
Tools menu  
The Tools menu items allow you to configure options for special functions. Select an item  
then press <Enter> to display the submenu.  
BIOS SETUP UTILITY  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
Tools  
Exit  
ASUS O.C. Profile  
AI NET 2  
ASUS EZ Flash 2  
Express Gate  
Enter OS Timer  
Reset User Data  
[Auto]  
[10 Seconds]  
[No]  
←→  
↑↓  
Select Screen  
Select Item  
Enter Go to Sub Screen  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
3.9.1  
ASUS O.C. Profile  
This item allows you to store or load multiple BIOS settings.  
BIOS SETUP UTILITY  
Tools  
O.C. PROFILE Configuration  
Typing your profile  
name, [0-9][a-z][A-Z]  
are acceptable.  
O.C. Profile 1 Status : Not Installed  
O.C. Profile 2 Status : Not Installed  
O.C. Profile 3 Status : Not Installed  
O.C. Profile 4 Status : Not Installed  
O.C. Profile 5 Status : Not Installed  
O.C. Profile 6 Status : Not Installed  
O.C. Profile 7 Status : Not Installed  
O.C. Profile 8 Status : Not Installed  
Status:  
Add Your CMOS Profile.  
←→  
↑↓  
F1  
F10  
ESC  
Select Screen  
Select Item  
General Help  
Save and Exit  
Exit  
Name:  
[Default-Profile]  
Save To:  
Load CMOS Profiles.  
Load From:  
[Uninstalled]  
[Blank]  
Start O.C. Profile  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
Add Your CMOS Profile  
Allows you to save the current BIOS file to the BIOS Flash. In the Name sub-item, type your  
profile name and press <Enter>, and then choose a profile number to save your CMOS  
settings in the Save to sub-item.  
Load CMOS Profiles  
Allows you to load the previous BIOS settings saved in the BIOS Flash. Press <Enter>, and  
choose a profile to load.  
Start O.C. Profile  
Allows you to run the utility to save and load CMOS. Press <Enter> to run the utility.  
ASUS P7P55D  
3-33  
ASUSTek O.C. Profile Utility V4.00a  
Current CMOS  
Restore CMOS  
BOARD: P7P55D  
BOARD: Unknown  
VER: Unknown  
DATE: Unknown  
VER: 0157  
DATE: 06/19/2009  
PATH: A:\  
A:  
Note  
[Enter] Select or Load  
[Up/Down/Home/End] Move  
[Tab] Switch  
[B] Backup  
[V] Drive Info  
[Esc] Exit  
•
•
•
•
This function can support devices such as a USB flash disk with FAT 32/16 format and  
single partition only.  
DO NOT shut down or reset the system while updating the BIOS to prevent the  
system boot failure!  
We recommend that you update the BIOS file only coming from the same memory/CPU  
configuration and BIOS version.  
Only the CMO file can be loaded.  
3.9.2  
AI NET 2  
BIOS SETUP UTILITY  
Tools  
AI NET 2  
Pair Status Length  
Check Realtek LAN  
cable during POST.  
It will take 3 to 10  
seconds to diagnose  
LAN cable.  
Check Realtek LAN cable  
[Disabled]  
Check Realtek LAN Cable [Disabled]  
[Disabled]  
BIOS will not check the Realtek LAN cable during the Power-On Self-Test  
(POST).  
[Enabled]  
BIOS checks the Realtek LAN cable during the Power-On Self-Test  
(POST).  
3.9.3  
ASUS EZ Flash 2  
Allows you to run ASUS EZ Flash 2. When you press <Enter>, a confirmation message  
appears. Use the left/right arrow key to select between [Yes] or [No], then press <Enter> to  
confirm your choice. Check section 3.2.2 ASUS EZ Flash 2 utility for details.  
3-34  
Chapter 3: BIOS setup  
3.9.4  
Express Gate [Auto]  
Allows you to enable or disable the ASUS Express Gate feature. The ASUS Express Gate  
feature is a unique instant-on environment that provides quick access to the Internet browser  
and Skype. Configuration options: [Enabled] [Disabled] [Auto]  
Enter OS Timer [10 Seconds]  
Sets countdown duration that the system waits at the Express Gate’s first screen  
before starting Windows or other installed OS. Choose [Prompt User] to stay at the first  
screen of Express Gate for user action.  
Configuration options: [Prompt User] [1 second] [3 seconds] [5 seconds] [10 seconds]  
[15 seconds] [20 seconds] [30 seconds]  
Reset User Data [No]  
Allows you to clear Express Gate’s user data.  
[Reset]  
When setting this item to [Reset], ensure that you save the setting to the  
BIOS so that the user data will be cleared the next time you enter the  
Express Gate. User data includes the Express Gate’s settings as well as  
any personal information stored by the web browser such as bookmarks,  
cookies, browsing history. This is useful in the rare case where corrupt  
settings prevent the Express Gate environment from launching properly.  
[No]  
Set to [No] to disable the Reset User Data function when entering the  
Express Gate.  
The first time wizard will run again when you enter the Express Gate environment after  
clearing its settings.  
ASUS P7P55D  
3-35  
3.10 Exit menu  
The Exit menu items allow you to load the optimal or failsafe default values for the BIOS  
items, and save or discard your changes to the BIOS items.  
BIOS SETUP UTILITY  
Main  
Ai Tweaker  
Advanced  
Power  
Boot  
Tools  
Exit  
Exit Options  
Exit system setup  
after saving the  
changes.  
Exit & Save Changes  
Exit & Discard Changes  
Discard Changes  
F10 key can be used  
for this operation.  
Load Setup Defaults  
←→  
↑↓  
Select Screen  
Select Item  
Enter Go to Sub Screen  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2009, American Megatrends, Inc.  
Pressing <Esc> does not immediately exit this menu. Select one of the options from this  
menu or <F10> from the legend bar to exit.  
Exit & Save Changes  
Once you are finished making your selections, choose this option from the Exit menu to  
ensure the values you selected are saved to the CMOS RAM. An onboard backup battery  
sustains the CMOS RAM so it stays on even when the PC is turned off. When you select this  
option, a confirmation window appears. Select Ok to save changes and exit.  
If you attempt to exit the Setup program without saving your changes, the program prompts  
you with a message asking if you want to save your changes before exiting. Press <Enter>  
to save the changes while exiting.  
Exit & Discard Changes  
Select this option only if you do not want to save the changes that you made to the  
Setup program. If you made changes to fields other than System Date, System Time, and  
Password, the BIOS asks for a confirmation before exiting.  
Discard Changes  
This option allows you to discard the selections you made and restore the previously saved  
values. After selecting this option, a confirmation appears. Select Ok to discard any changes  
and load the previously saved values.  
Load Setup Defaults  
This option allows you to load the default values for each of the parameters on the Setup  
menus. When you select this option or if you press <F5>, a confirmation window appears.  
Select Ok to load default values. Select Exit & Save Changes or make other changes before  
saving the values to the non-volatile RAM.  
3-36  
Chapter 3: BIOS setup  
Chapter 4  
Chapter 4:  
Software support  
4.1  
Installing an operating system  
This motherboard supports Windows® XP/ 64-bit XP/ Vista / 64-bit Vista / 7 / 64-bit 7  
operating systems (OS). Always install the latest OS version and corresponding updates to  
maximize the features of your hardware.  
•
Motherboard settings and hardware options vary. Use the setup procedures presented  
in this chapter for reference only. Refer to your OS documentation for detailed  
information.  
•
Ensure that you install the Windows® XP Service Pack 2 or later versions before  
installing the drivers for better compatibility and system stability.  
4.2  
Support DVD information  
The support DVD that comes with the motherboard package contains the drivers, software  
applications, and utilities that you can install to avail all motherboard features.  
The contents of the support DVD are subject to change at any time without notice. Visit the  
ASUS website at www.asus.com for updates.  
4.2.1  
Running the support DVD  
Place the support DVD into the optical drive. The DVD automatically displays the Drivers menu if  
Autorun is enabled in your computer. Click each menu tab and select the items you want to install.  
The Make disk menu  
contains items to  
create the RAID/AHCI  
driver disk.  
The Manual menu contains  
the list of supplementary user  
manuals. Click an item to open  
the folder of the user manual.  
The Drivers menu shows the available  
device drivers if the system detects  
installed devices. Install the necessary  
drivers to use the devices.  
The Utilities  
menu shows the  
applications and  
other software that  
the motherboard  
supports.  
Click the Contact  
tab to display the  
ASUS contact  
information.  
Click an icon  
to display DVD/  
motherboard  
information  
Click an item  
to install  
If Autorun is NOT enabled in your computer, browse the contents of the support DVD to  
locate the file ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run  
the DVD.  
ASUS P7P55D  
4-1  
4.2.2  
Obtaining the software manuals  
The software manuals are included in the support DVD. Follow the instructions below to get  
the necessary software manuals.  
The software manual files are in Portable Document Format (PDF). Install the Adobe®  
Acrobat® Reader from the Utilities menu before opening the files.  
1.  
Click the support DVD icon.  
2.  
The support DVD contents are  
displayed in graphical format.  
Double-click the Manual folder.  
3.  
Double-click the folder of your  
selected manual.  
The screenshots in this section are for reference only. The actual software manuals  
containing in the support DVD vary by models.  
4-2  
Chapter 4: Software support  
4.3  
Software information  
Most of the applications in the support DVD have wizards that will conveniently guide you  
through the installation. View the online help or readme file that came with the software  
application for more information.  
4.3.1  
ASUS PC Probe II  
PC Probe II is a utility that monitors the computer’s vital components, and detects and  
alerts you of any problem with these components. PC Probe II senses fan rotations, CPU  
temperature, and system voltages, among others. Because PC Probe II is software-based,  
you can start monitoring your computer the moment you turn it on. With this utility, you are  
assured that your computer is always at a healthy operating condition.  
Launching PC Probe II  
1.  
2.  
Install PC Probe II from the motherboard support DVD.  
Launch PC Probe II by clicking Start > All Programs > ASUS > PC Probe II > PC  
Probe II v1.xx.xx. The PC Probe II main window appears.  
3.  
The PC Probe II icon appears in the Windows® notification area. Click this icon to close  
or restore the application.  
PC Probe II main window  
Button  
Function  
Opens the Configuration window  
Opens the Report window  
Opens the Desktop Management Interface window  
Opens the Peripheral Component Interconnect window  
Opens the Windows Management Instrumentation window  
Opens the hard disk drive, memory, CPU usage window  
Shows/Hides the Preference section  
Minimizes the application  
Closes the application  
Refer to the software manual in the support DVD or visit the ASUS website at  
www.asus.com for detailed software configuration.  
ASUS P7P55D  
4-3  
4.3.2  
ASUS AI Suite  
ASUS AI Suite allows you to launch several ASUS utilities easily.  
Launching AI Suite  
1.  
2.  
Install AI Suite from the motherboard support DVD.  
Launch AI Suite by clicking Start > All Programs > ASUS > AI Suite > AI Suite v1.xx.  
xx. The AI Suite main window appears.  
3.  
The AI Suite icon  
application main window, click this icon to restore the window.  
appears in the Windows® notification area. If you minimize the  
Using AI Suite  
Click each utility button to launch the utility, or click the Normal button to restore system  
default settings.  
Click to open the monitor window that displays  
system information such as CPU temperature,  
CPU voltage, fan speed, and CPU/FSB frequency  
Click to restore  
default settings  
Click to launch  
each utility  
•
•
The screenshots in this section are for reference only. The actual utility buttons vary  
by models.  
Refer to the software manual in the support DVD or visit the ASUS website at  
www.asus.com for detailed software configuration.  
4-4  
Chapter 4: Software support  
4.3.3  
ASUS Fan Xpert  
Asus Fan Xpert allows you to adjust both the CPU and chassis fan speeds according to  
different ambient temperatures and your PC’s system loading. The various fan profiles offer  
flexible controls of fan speeds to achieve a quiet and cool system environment.  
Launching Fan Xpert  
After installing AI Suite from the motherboard support DVD, launch Fan Xpert by double-  
clicking the AI Suite tray icon and then clicking the Fan Xpert button  
on the AI Suite  
main window.  
Using Fan Xpert  
Click to open the  
Calibration window  
Click to select a fan  
Click to select a  
Click to display  
the current CPU  
temperature and the fan  
speed ratio  
fan profile  
Click to cancel  
the settings  
Click to apply  
the settings  
Fan profiles  
•
•
•
•
•
Disable: disables the Fan Xpert function.  
Standard: adjusts fan speed in a moderate pattern.  
Silent: minimizes fan speed for quiet fan operation.  
Turbo: maximizes the fan speed for the best cooling effect.  
Intelligent: automatically adjusts the CPU fan speed according to the ambient  
temperature.  
•
•
Stable: fixes the CPU fan speed to avoid noise caused by the unsteady fan rotation. The  
fan will speed up when the temperature exceeds 70ºC.  
User: Allows you to configure the CPU fan profile under certain limitations.  
ASUS P7P55D  
4-5  
4.3.4  
ASUS EPU-6 Engine  
ASUS EPU-6 Engine is an energy-efficient tool that satisfies different computing needs.  
This utility provides four modes that you can select to enhance system performance or save  
power:  
•
•
Turbo Mode  
•
•
Medium Power Saving Mode  
Max. Power Saving Mode  
High Performance Mode  
Selecting Auto Mode  
will have the system shift modes automatically according to  
current system status. You can also customize each mode by configuring settings like CPU  
frequency, vCore Voltage, and Fan Control.  
Launching 6 Engine  
After installing EPU-6 Engine from the motherboard  
support DVD, launch the program by double-clicking  
the 6 Engine tray icon.  
The first time you launch 6 Engine, the  
following message will appear, asking  
you to run Calibration first. Running  
calibration allows the system to detect  
CPU properties to optimize power  
management.  
Click Run Calibration and wait for a few seconds. Then, the 6 Engine main menu appears.  
6 Engine main menu  
4-6  
Chapter 4: Software support  
4.3.5  
ASUS Express Gate  
ASUS Express Gate is an instant-on environment that gives you quick access to the Internet,  
Skype, and viewing your pictures. Within a few seconds of powering on your computer, you  
will be at the Express Gate menu where you can start the web browser, Skype, or other  
Express Gate applications.  
Notices about ASUS Express Gate  
•
•
Ensure to install ASUS Express Gate from the motherboard support DVD before use.  
ASUS Express Gate supports SATA devices in IDE mode only. See chapter 3 for BIOS  
setup details.  
•
ASUS Express Gate supports SATA devices connected to motherboard chipset-  
controlled onboard SATA ports only. All onboard extended SATA ports and external  
SATA ports are NOT supported. See chapter 2 for the exact location of onboard SATA  
ports.  
•
ASUS Express Gate supports file uploading from ODD and USB drives and  
downloading to USB drives only.  
•
ASUS Express Gate supports installation on SATA HDDs, USB HDDs and Flash  
drives with at least 1.2GB of available disk space. When installed on USB HDDs and  
Flash drives, connect the drives to the motherboard USB port before turning on the  
computer.  
•
•
Your monitor must support the screen resolution of 1024 x 768, or ASUS Express  
Gate will be skipped during the booting process, and the existing OS will be launched  
directly.  
Installation of at least 1GB system memory is recommended for better performance.  
The First Screen  
Express Gate’s first screen appears within a few seconds after you power on the computer.  
Click any of the application  
icons to enter Express Gate  
environment and launch the  
selected application  
Turn off the computer  
Continue booting to existing OS when the timer above the Exit icon counts  
down to zero (0); click to immediately enter existing OS  
•
To enter the motherboard BIOS setup program, click Exit on the Express Gate First  
Screen, and then press the <Del> key during POST.  
•
•
See the software manual in the bundled motherboard support DVD or click  
Express Gate environment for detailed software instructions.  
in the  
Express Gate complies with the OpenGL standard. Refer to http://support.asus.com  
for Express Gate source codes.  
ASUS P7P55D  
4-7  
4.3.6  
VIA® High Definition Audio utility  
The VIA® High Definition Audio CODEC provides 8-channel audio capability to deliver the  
ultimate audio experience on your computer. The software provides Jack-Detection,  
Multi-Streaming, Front Panel Jack-Retasking and S/PDIF Out support.  
Follow the installation wizard to install the VIA® Audio Driver from the support CD/DVD that  
came with the motherboard package.  
If the VIA audio software is correctly installed, you will find the  
VIA HD Audio Deck icon on the Windows notification area. Click  
on the icon to display the VIA HD Audio Deck.  
VIA HD Audio Deck  
A.  
VIA HD Audio Deck for Windows® Vista™ / Windows® 7™  
Device volume control  
Minimize button  
Exit button  
Analog  
and digital  
connector  
status  
Default Device  
button  
Expert Mode  
Software  
information  
Advanced Options  
B.  
VIA HD Audio Deck for Windows XP  
Display panel and  
volume control  
Minimize button  
Configuration  
options  
Control settings  
window  
Refer to the software manual in the support DVD or visit the ASUS website at  
www.asus.com for detailed software configuration.  
4-8  
Chapter 4: Software support  
4.4  
ASUS Unique Overclocking Utility—  
TurboV EVO  
ASUS TurboV EVO introduces TurboV and Turbo Key—two powerful tools that allow you to  
overclock your system effectively and safely. Install ASUS TurboV EVO from the support DVD  
that came with the motherboard package.  
If the TurboV EVO is correctly installed, you will find the TurboV EVO icon  
on the Windows notification area. Click on the icon to display the TurboV  
EVO control panel.  
4.4.1  
Using ASUS TurboV  
ASUS TurboV allow you to overclock the BCLK frequency, CPU voltage, IMC voltage, and  
DRAM Bus voltage in WIndows® environment and takes effect in real-time without exiting and  
rebooting the OS.  
Refer to the CPU documentation before adjusting CPU voltage settings. Setting a high  
voltage may damage the CPU permanently, and setting a low voltage may make the  
system unstable.  
For system stability, all changes made in ASUS TurboV (except for Auto Tuning) will not  
be saved to BIOS settings and will not be kept on the next system boot. Use the Save  
Profile function to save your customized overclocking settings and manually load the  
profile after Windows starts.  
Easy Mode Auto Tuning Mode  
Save the  
Manual Mode  
current  
Load profile  
settings as a  
new profile  
Target values  
Voltage  
Adjustment  
bars  
Start-up values  
Advanced  
CPU, chipset  
and DRAM  
voltage  
settings  
Click to show / hide  
more settings  
Click to restore all  
start-up settings  
Undoes all changes without applying  
Applies all changes immediately  
•
•
•
Set the CPU Ratio Setting item in BIOS to [Auto] before using the CPU Ratio function  
in TurboV. See Chapter 3 for details.  
For advanced overclock ability, adjust first the BIOS items, and then proceed more  
detailed adjustments using TurboV.  
Refer to the software manual in the support DVD or visit the ASUS website at  
www.asus.com for detailed software configuration.  
ASUS P7P55D  
4-9  
4.4.2  
Using ASUS TurboV Auto Tuning Mode  
The Auto Tuning Mode allows smart auto-overclocking. Follow the instructions below to let  
TurboV EVO detect and overclock your system.  
1.  
2.  
3.  
Click the Auto Tuning tab and then click  
Start. You can also click More Setting  
first to configure more overclocking  
parameters before starting auto-  
overclocking.  
Read through the warning messages and  
click Yes to start auto-overclocking.  
An animation appears indicating the  
overclocking process. Click Stop if you  
want to cancel the current Overclocking  
process.  
•
•
After pressing Start, the system starts performance tuning and may reboot 2 to 3  
times. Please do not operate or manually restart the computer during the tuning  
process.  
After restarting OS, a message appears indicating the current overclocking result.  
You can click Stop to save the current overclocking setting, or wait for TurboV EVO to  
continue system tuning for higher system performance.  
•
•
•
The auto-tuned system performance varies on the installed device (ex., CPU and  
DRAM).  
The auto-tuning function overclocks your system settings. Installation of advanced  
cooling systems is recommended.  
The auto-tuned settings will be stored in system BIOS and will be applied in the next  
boot.  
4-10  
Chapter 4: Software support  
4.4.3  
Using ASUS Turbo Key  
ASUS Turbo Key allows the user to set a group of hot-keys into physical overclocking  
buttons. After the easy setup, Turbo Key can boost performances without interrupting ongoing  
work or games—with just one touch!  
If the TurboV EVO is correctly installed, you will find the TurboV EVO icon  
on the Windows notification area. Click on the icon to display the TurboV  
EVO control panel. Click the Turbo Key tab to switch to the Turbo Key  
interface.  
Configuring ASUS Turbo Key  
1
2
3
4
1.  
2.  
Select your desired hotkey combination.  
You can decide the performance boost level by selecting Turbo Key Profile. You can  
also load personal profiles saved in the ASUS TurboV utility.  
3.  
4.  
Choose whether to show Turbo Key OSD and status.  
Click Apply for all settings to take effect.  
You have to press the assigned hotkeys to use the Turbo Key function.  
ASUS P7P55D  
4-11  
4.5  
RAID configurations  
The motherboard comes with the Intel® P55 chipset that allows you to configure Serial ATA  
hard disk drives as RAID sets. The motherboard supports the following RAID configurations:  
RAID 0, RAID 1, RAID 10 and RAID 5.  
•
•
•
You must install Windows® XP Service Pack 2 or later versions before using Serial  
ATA hard disk drives. The Serial ATA RAID feature is available only if you are using  
Windows® XP SP2 or later versions.  
Due to Windows® XP / Vista limitation, a RAID array with the total capacity over 2TB  
cannot be set as a boot disk. A RAID array over 2TB can only be set as a data disk  
only.  
If you want to install a Windows® operating system to a hard disk drive included in a  
RAID set, you have to create a RAID driver disk and load the RAID driver during OS  
installation. Refer to section 4.6 Creating a RAID driver disk for details.  
4.5.1  
RAID definitions  
RAID 0 (Data striping) optimizes two identical hard disk drives to read and write data in  
parallel, interleaved stacks. Two hard disks perform the same work as a single drive but at a  
sustained data transfer rate, double that of a single disk alone, thus improving data access  
and storage. Use of two new identical hard disk drives is required for this setup.  
RAID 1 (Data mirroring) copies and maintains an identical image of data from one drive to  
a second drive. If one drive fails, the disk array management software directs all applications  
to the surviving drive as it contains a complete copy of the data in the other drive. This RAID  
configuration provides data protection and increases fault tolerance to the entire system. Use  
two new drives or use an existing drive and a new drive for this setup. The new drive must be  
of the same size or larger than the existing drive.  
RAID 5 stripes both data and parity information across three or more hard disk drives. Among  
the advantages of RAID 5 configuration include better HDD performance, fault tolerance, and  
higher storage capacity. The RAID 5 configuration is best suited for transaction processing,  
relational database applications, enterprise resource planning, and other business systems.  
Use a minimum of three identical hard disk drives for this setup.  
RAID 10 is data striping and data mirroring combined without parity (redundancy data) having  
to be calculated and written. With the RAID 10* configuration you get all the benefits of both  
RAID 0 and RAID 1 configurations. Use four new hard disk drives or use an existing drive  
and three new drives for this setup.  
Intel® Matrix Storage. The Intel® Matrix Storage technology supported by the PCH chip  
allows you to create a RAID 0, RAID 1, RAID 5, and RAID 10* function to improve both  
system performance and data safety. You can also combine two RAID sets to get higher  
performance, capacity, or fault tolerance provided by the difference RAID function. For  
example, RAID 0 and RAID 1 set can be created by using only two identical hard disk drives.  
4-12  
Chapter 4: Software support  
4.5.2  
Installing Serial ATA hard disks  
The motherboard supports Serial ATA hard disk drives. For optimal performance, install  
identical drives of the same model and capacity when creating a disk array.  
To install the SATA hard disks for a RAID configuration:  
1.  
2.  
3.  
Install the SATA hard disks into the drive bays.  
Connect the SATA signal cables.  
Connect a SATA power cable to the power connector on each drive.  
4.5.3  
Setting the RAID item in BIOS  
You must enable the RAID function in the BIOS Setup before creating RAID set(s) using  
SATA HDDs. To do this:  
1.  
2.  
3.  
4.  
Enter the BIOS Setup during POST.  
Go to the Main menu > Storage Configuration, and then press <Enter>.  
Set the Configure SATA as item to [RAID].  
Save your changes, and then exit the BIOS Setup.  
Refer to Chapter 3 for details on entering and navigating through the BIOS Setup.  
Due to chipset limitation, when set any of SATA ports to RAID mode, all SATA ports run at  
RAID mode together.  
4.5.4  
Intel® Matrix Storage Manager option ROM utility  
To enter the Intel® Matrix Storage Manager option ROM utility  
1.  
2.  
Turn on the system.  
During POST, press <Ctrl> + <I> to display the utility main menu.  
Intel(R) Matrix Storage Manager option ROM v8.9.0.1014 PCH-D wRAID5  
Copyright(C) 2003-09 Intel Corporation. All Rights Reserved.  
[ MAIN MENU ]  
1. Create RAID Volume  
2. Delete RAID Volume  
3. Reset Disks to Non-RAID  
4. Recovery Volume Options  
5. Exit  
[ DISK/VOLUME INFORMATION ]  
RAID Volumes:  
None defined.  
Physical Disks:  
Port Drive Model  
Serial #  
9LS0HJA4  
9LS0F4HL  
3LS0JYL8  
9LS0BJ5H  
Size  
Type/Status(Vol ID)  
Non-RAID Disk  
Non-RAID Disk  
Non-RAID Disk  
Non-RAID Disk  
0
1
2
3
ST3160812AS  
ST3160812AS  
ST3160812AS  
ST3160812AS  
149.0GB  
149.0GB  
149.0GB  
149.0GB  
[↑↓]-Select  
[ESC]-Exit  
[ENTER]-Select Menu  
ASUS P7P55D  
4-13  
The navigation keys at the bottom of the screen allow you to move through the menus  
and select the menu options.  
The RAID BIOS setup screens shown in this section are for reference only and may not  
exactly match the items on your screen.  
The utility supports maximum four hard disk drives for RAID configuration.  
Creating a RAID volume  
To create a RAID set  
1.  
From the utility main menu, select 1. Create RAID Volume and press <Enter>. The  
following screen appears.  
Intel(R) Matrix Storage Manager option ROM v8.9.0.1014 PCH-D wRAID5  
Copyright(C) 2003-09 Intel Corporation. All Rights Reserved.  
[ CREATE VOLUME MENU ]  
Name: Volume0  
RAID Level: RAID0(Stripe)  
Disks: Select Disks  
Strip Size:  
128KB  
Capacity: 0.0  
Sync: N/A  
GB  
Create Volume  
[ HELP ]  
Enter a unique volume name that has no special characters and is  
16 characters or less.  
[↑↓]Change  
[TAB]-Next  
[ESC]-Previous Menu  
[ENTER]-Select  
2.  
3.  
Enter a name for the RAID set and press <Enter>.  
When the RAID Level item is selected, press the up/down arrow key to select a RAID  
mode to create, and then press <Enter>.  
4.  
When the Disks item is selected, press <Enter> to select the hard disk drives you want  
to include in the RAID set. The SELECT DISKS screen appears.  
[ SELECT DISKS ]  
Port Drive Model  
Serial #  
9LS0HJA4  
9LS0F4HL  
3LS0JYL8  
9LS0BJ5H  
Size  
Status  
0
1
2
3
ST3160812AS  
ST3160812AS  
ST3160812AS  
ST3160812AS  
149.0GB  
149.0GB  
149.0GB  
149.0GB  
Non-RAID Disk  
Non-RAID Disk  
Non-RAID Disk  
Non-RAID Disk  
Select 2 to 6 disks to use in creating the volume.  
]-Prev/Next [SPACE]-SelectDisk [ENTER]-Done  
[
↑↓  
4-14  
Chapter 4: Software support  
5.  
Use the up/down arrow key to select a drive, and then press <Space> to select. A small  
triangle marks the selected drive. Press <Enter> after completing your selection.  
6.  
Use the up/down arrow key to select the stripe size for the RAID array (for RAID 0, 10  
and 5 only), and then press <Enter>. The available stripe size values range from 4 KB  
to 128 KB. The following are typical values:  
RAID 0: 128KB  
RAID 10: 64KB  
RAID 5: 64KB  
We recommend a lower stripe size for server systems, and a higher stripe size for  
multimedia computer systems used mainly for audio and video editing.  
7.  
8.  
When the Capacity item is selected, enter the RAID volume capacity that you want  
and press <Enter>. The default value indicates the maximum allowed capacity.  
When the Create Volume item is selected, press <Enter>. The following warning  
message appears.  
WARNING: ALL DATA ON SELECTED DISKS WILL BE LOST.  
Are you sure you want to create this volume? (Y/N):  
9.  
Press <Y> to create the RAID volume and return to the main menu, or <N> to go back  
to the CREATE VOLUME menu.  
ASUS P7P55D  
4-15  
Deleting a RAID set  
Take caution when deleting a RAID set. You will lose all data on the hard disk drives when  
you delete a RAID set.  
To delete a RAID set  
1.  
From the utility main menu, select 2. Delete RAID Volume and press <Enter>. The  
following screen appears.  
Intel(R) Matrix Storage Manager option ROM v8.9.0.1014 PCH-D wRAID5  
Copyright(C) 2003-09 Intel Corporation. All Rights Reserved.  
[ DELETE VOLUME MENU ]  
Name  
Volume0  
Level  
RAID0(Stripe)  
Drives  
2
Capacity  
298.0GB  
Status  
Normal  
Bootable  
Yes  
[ HELP ]  
Deleting a volume will reset the disks to non-RAID.  
WARNING: ALL DISK DATA WILL BE DELETED.  
(This does not apply to Recovery volumes)  
[↑↓]-Select  
[ESC]-Previous Menu  
[DEL]-Delete Volume  
2.  
Use the up/down arrow key to select the RAID set you want to delete, and then press  
<Del>. The following warning message appears.  
[ DELETE VOLUME VERIFICATION ]  
ALL DATA IN THE VOLUME WILL BE LOST!  
(This does not apply to Recovery volumes)  
Are you sure you want to delete volume “Volume0”? (Y/N):  
3.  
Press <Y> to delete the RAID set and return to the utility main menu, or press <N> to  
return to the DELETE VOLUME menu.  
Exiting the Intel® Matrix Storage Manager  
To exit the utility  
1.  
From the utility main menu, select 5. Exit, and then press <Enter>. The following  
warning message appears.  
[ CONFIRM EXIT ]  
Are you sure you want to exit? (Y/N):  
2.  
Press <Y> to exit or press <N> to return to the utility main menu.  
4-16  
Chapter 4: Software support  
4.6  
Creating a RAID driver disk  
A floppy disk with the RAID driver is required when installing Windows® XP operating system  
on a hard disk drive that is included in a RAID set. For Windows® Vista or later operating  
systems, use either a floppy disk or a USB flash drive with the RAID driver.  
•
•
The motherboard does not provide a floppy drive connector. You have to use a  
USB floppy disk drive when creating a SATA RAID driver disk.  
Windows® XP may not recognize the USB floppy disk drive due to Windows® XP  
limitation. To work around this OS limitation, refer to section 4.6.4 Using a USB  
floppy disk drive.  
4.6.1  
Creating a RAID driver disk without entering the OS  
To create a RAID driver disk without entering the OS  
1.  
2.  
3.  
4.  
5.  
6.  
Boot your computer.  
Press <Del> during POST to enter the BIOS setup utility.  
Set the optical drive as the primary boot device.  
Insert the support DVD into the optical drive.  
Save changes and exit BIOS.  
When the Make Disk menu appears, press <1> to create a 32/64bit Intel AHCI/RAID  
driver disk.  
7.  
Insert a formatted floppy disk into the USB floppy disk drive, then press <Enter>.  
8.  
Follow the succeeding screen instructions to complete the process.  
4.6.2  
Creating a RAID driver disk in Windows®  
To create a RAID driver disk in Windows®:  
1.  
2.  
3.  
4.  
Start Windows®.  
Plug the USB floppy disk drive and insert a floppy disk.  
Place the motherboard support DVD into the optical drive.  
Go to the Make Disk menu, and then click Intel AHCI/RAID Driver to create an Intel®  
RAID driver disk.  
5.  
Select USB floppy disk drive as the destination disk.  
6.  
Follow the succeeding screen instructions to complete the process.  
Write-protect the floppy disk to avoid a computer virus infection.  
ASUS P7P55D  
4-17  
4.6.3  
Installing the RAID driver during Windows® OS installation  
To install the RAID driver for Windows® XP  
1.  
2.  
3.  
4.  
During the OS installation, the system prompts you to press the F6 key to install third-  
party SCSI or RAID driver.  
Press <F6>, and then insert the floppy disk with RAID driver into the USB floppy disk  
drive.  
When prompted to select the SCSI adapter to install, ensure that you select Intel(R)  
ICH8R/ICH9R/ICH10R/DO/PCH SATA RAID Controller.  
Follow the succeeding screen instructions to complete the installation.  
To install the RAID driver for Windows® Vista or later OS  
1.  
2.  
3.  
Insert the floppy disk or USB flash drive with RAID driver into the USB floppy disk drive  
or USB port.  
During the OS installation, select Intel(R) ICH8R/ICH9R/ICH10R/DO/PCH SATA RAID  
Controller.  
Follow the succeeding screen instructions to complete the installation.  
4.6.4  
Using a USB floppy disk drive  
Due to OS limitation, Windows® XP may not recognize the USB floppy disk drive when you  
install the RAID driver from a floppy disk during the OS installation.  
To solve this issue, add the USB floppy disk drive’s Vendor ID (VID) and Product ID (PID) to  
the floppy disk containing the RAID driver. Refer to the steps below:  
1.  
Using another computer, plug the USB floppy disk drive, and insert the floppy disk  
containing the RAID driver.  
2.  
Right-click My Computer on the  
Windows® desktop or start menu,  
and then select Manage from the  
pop-up window.  
or  
3.  
Select Device Manager. From the  
Universal Serial Bus controllers,  
right-click xxxxxx USB Floppy, and  
then select Properties from the pop-up  
window.  
The name of the USB floppy disk  
drive varies with different vendors.  
4-18  
Chapter 4: Software support  
4.  
Click Details tab. The Vendor ID (VID)  
and Product ID (PID) are displayed.  
5.  
Browse the contents of the RAID driver  
disk to locate the file txtsetup.oem.  
6.  
Double-click the file. A window appears,  
allowing you to select the program for  
opening the oem file.  
7.  
Use Notepad to open the file.  
ASUS P7P55D  
4-19  
8.  
9.  
Find the [HardwareIds.scsi.iaAHCI_PCH] and  
[HardwareIds.scsi.iastor_8R9R10RDOPCH] sections in the txtsetup.oem file.  
Type the following line to the bottom of the two sections:  
id = “USB\VID_xxxx&PID_xxxx”, “usbstor”  
[HardwareIds.scsi.iaAHCI_PCH]  
id= “PCI\VEN_8086&DEV_3A22&CC_0106”,”iaStor”  
id= “USB\VID_03EE&PID_6901”, “usbstor”  
[HardwareIds.scsi.iaStor_8R9R10RDOPCH]  
id= “PCI\VEN_8086&DEV_3A22&CC_0106”,”iaStor”  
id= “USB\VID_03EE&PID_6901”, “usbstor”  
Add the same line to both sections.  
The VID and PID vary with different vendors.  
10. Save and exit the file.  
4-20  
Chapter 4: Software support  
Chapter 5  
Chapter 5:  
Multiple GPU technology support  
5.1  
ATI® CrossFireX™ technology  
The motherboard supports the ATI® CrossFireX™ technology that allows you to install multi-  
graphics processing units (GPU) graphics cards. Follow the installation procedures in this  
section.  
5.1.1  
Requirements  
•
In Dual CrossFireX mode, you should have two identical CrossFireX-ready graphics  
cards or one CrossFireX-ready dual-GPU graphics card that are ATI® certified.  
•
•
Ensure that your graphics card driver supports the ATI CrossFireX technology.  
Download the latest driver from the AMD website (www.amd.com).  
Ensure that your power supply unit (PSU) can provide at least the minimum power  
required by your system. See page 2-38 for details.  
•
We recommend that you install additional chassis fans for better thermal environment.  
•
Visit the ATI Game website (http://game.amd.com) for the latest certified graphics card  
and the supported 3D application list.  
5.1.2  
Before you begin  
For ATI CrossFireX to work properly, you have to uninstall all existing graphics card drivers  
before installing ATI CrossFireX graphics cards to your system.  
To uninstall existing graphics card drivers  
1.  
2.  
Close all current applications.  
For Windows XP, go to Control Panel > Add/Remove Programs.  
For Windows Vista, go to Control Panel > Programs and Features.  
3.  
4.  
Select your current graphics card driver/s.  
For Windows XP, select Add/Remove.  
For Windows Vista, select Uninstall.  
5.  
Turn off your computer.  
ASUS P7P55D  
5-1  
5.1.3  
Installing two CrossFireX™ graphics cards  
The following pictures are for reference only. The graphics cards and the motherboard  
layout may vary with models, but the installation steps remain the same.  
1.  
2.  
Prepare two CrossFireX-ready graphics  
cards.  
Insert the two graphics card into the  
PCIEX16 slots. If your motherboard  
has more than two PCIEX16 slots,  
refer to Chapter 2 in this user manual  
for the locations of the PCIEX16 slots  
recommended for multi-graphics card  
installation.  
3.  
Ensure that the cards are properly  
seated on the slots.  
4.  
Align and firmly insert the CrossFireX  
bridge connector to the goldfingers on  
each graphics card. Ensure that the  
connector is firmly in place.  
Goldfingers  
CrossFireX bridge  
5.  
6.  
Connect two independent auxiliary power  
sources from the power supply to the two  
graphics cards separately.  
Connect a VGA or a DVI cable to the  
graphics card.  
5-2  
Chapter 5: Multiple GPU technology support  
5.1.4  
Installing the device drivers  
Refer to the documentation that came with your graphics card package to install the device  
drivers.  
Ensure that your PCI Express graphics card driver supports the ATI® CrossFireX™  
technology. Download the latest driver from the AMD website (www.amd.com).  
5.1.5  
Enabling the ATI® CrossFireX™ technology  
After installing your graphics cards and the device drivers, enable the CrossFireX™ feature  
through the ATI Catalyst™ Control Center in Windows environment.  
Launching the ATI Catalyst Control Center  
To launch the ATI Catalyst Control Center  
1.  
Right-click on the Windows® desktop and select  
Catalyst(TM) Control Center. You can also right-  
click the ATI icon in the Windows notification area  
and select Cayalist Control Center.  
2.  
The Catalyst Control Center Setup  
Assistant appears when the system  
detects the existance of multi-graphics  
cards. Click Go to continue to the  
Catalyst Control Center Advanced  
View window.  
ASUS P7P55D  
5-3  
Enabling Dual CrossFireX settings  
1.  
In the Catalyst Control Center window,  
click Graphics Settings > CrossFireX >  
Configure.  
2.  
From the Graphics Adapter list, select  
the graphics card to act as the display  
GPU.  
2
3.  
4.  
Select Enable CrossFireX.  
3
1
Click Apply, and then click OK to exit  
the window.  
4
5-4  
Chapter 5: Multiple GPU technology support  

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