Asus P7H55 User Manual

P7H55/USB3  
Contents  
iii  
Contents  
iv  
Contents  
v
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  
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.  
vi  
 
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 adpater or extension cord. These devices  
could interrupt the grounding circuit.  
Make sure 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, make sure 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.  
Place the product on a stable surface.  
If you encounter technical problems with the product, contact a qualified service  
technician or your retailer.  
vii  
 
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: BIOS information  
This chapter tells how to change system settings through the BIOS Setup menus.  
Detailed descriptions of the BIOS parameters are also provided.  
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.  
Conventions used in this guide  
To make sure 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>+<D>  
viii  
 
P7H55/USB3 specifications summary  
CPU  
LGA1156 socket for Intel® Core™ i7 / Core™ i5 /  
Core™ i3 / Pentium™ Processors  
Supports Intel® Turbo Boost Technology  
* The Intel® Turbo Boost Technology support depends on  
the CPU types.  
Chipset  
Memory  
Intel® H55 Express Chipset  
4 x DIMM, max. 16GB, DDR3 2200(O.C.)* / 2000 / 1866 /  
1600 / 1333 MHz, non-ECC, un-buffered memory  
Dual channel memory architecture  
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. Please refer to  
Memory QVL for details.  
Memory QVL (Qualified Vendors Lists)  
Expansion Slots  
1 x PCI Express 2.0 x16 slot (blue)  
1 x PCI Express 2.0 x16 slot (@ x4 speed, 2.5GT/s, black)  
2 x PCI Express 2.0 x1 slots (2.5GT/s)  
2 x PCI slots  
Multi-GPU support  
Storage  
Supports ATI® Quad-GPU CrossFireX™ Technology  
Intel® H55 Express Chipset:  
-
6 x SATA 3.0 Gb/s ports  
LAN  
USB  
Realtek® 8112L Gigabit LAN controller featuring AI NET2  
10 x USB 2.0/1.1 ports (4 ports at mid-board, 6 ports at rear  
panel)  
2 x USB 3.0/2.0 ports (2 ports at back panel)  
Audio  
VIA® 1708S 8-channel High Definition Audio CODEC  
-
-
Optical S/PDIF out port at back I/O  
Support Jack-Detection and Multi-Streaming  
(continued on the next page)  
ix  
 
P7H55/USB3 specifications summary  
ASUS Unique Features  
Hybrid Processer:  
-
ASUS TurboV EVO, TurboV, Auto Tuning  
Hybrid Switch:  
-
Turbo Key II  
Hybrid OS:  
-
Express Gate  
ASUS Exclusive Features:  
-
-
MemOK!  
ASUS EPU  
ASUS Quiet Thermal Solution:  
-
ASUS Fanless Design: Stylish Heatsink Solution, MOS  
Heatsink  
-
ASUS Fan Xpert  
ASUS EZ DIY:  
-
-
-
-
-
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: Adjustable IMC voltage at 0.00625V increment  
vDRAM Bus: 64-step DRAM voltage control  
vPCH: 36-step chipset voltage control  
vCPU PLL: 56-step reference voltage control  
SFS (Stepless Frequency Selection):  
-
Internal Base Clock tuning from 80 MHz 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 S/PDIF Out (Optical)  
1 x RJ45 port  
6 x USB 2.0/1.1 ports  
2 x USB 3.0/2.0 ports  
8-channel Audio I/O  
(continued on the next page)  
x
P7H55/USB3 specifications summary  
Internal I/O Connectors  
2 x USB connectors support additional 4 USB ports  
6 x SATA 3Gb/s connectors  
1 x 4-pin CPU Fan connector  
1 x 3-pin Chassis Fan connector  
1 x 3-pin Power Fan connector  
1 x Front panel audio connector  
1 x S/PDIF Out header  
1 x CD audio in  
1 x 24-pin EATX Power connector  
1 x 4-pin ATX 12V Power connector  
1 x System Panel  
1 x MemOK! button  
1 x COM connector  
BIOS Features  
16 Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0,  
SM BIOS 2.5, ACPI 2.0a  
Manageability  
Accessories  
WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE  
2 x Serial ATA 3.0Gb/s cables  
1 x I/O shield  
2 in 1 Q-connector (USB, System panel; Retail version only)  
User's manual  
Support DVD Contents  
Drivers  
ASUS Utilities  
ASUS Update  
Anti-virus software (OEM version)  
Form Factor  
ATX Form Factor, 12”x 8.6” (30.5cm x 21.8cm)  
*Specifications are subject to change without notice.  
xi  
xii  
Chapter 1  
Product introduction  
Thank you for buying an ASUS® P7H55/USB3 motherboard!  
Before you start installing the motherboard, and hardware devices on it, check the items in  
your motherboard package. Refer to page ix for the list of accessories.  
If any of the items is damaged or missing, contact your retailer.  
1.1  
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.  
Onboard 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 must 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 P7H55/USB3  
1-1  
 
1.2  
Motherboard overview  
1.2.1  
Motherboard layout  
Ensure that you install the motherboard into the chassis in the correct orientation. The edge  
with external ports goes to the rear part of the chassis.  
Place this side towards  
the rear of the chassis.  
Place six 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.  
1.2.2  
Layout contents  
Connectors/Jumpers/Slots/LED  
Page  
Connectors/Jumpers/Slots/LED  
Page  
ATX power connectors  
(24-pin EATXPWR, 4-pin EATX12V)  
1.  
1-22 8.  
System panel connector (20-8 pin PANEL)  
1-26  
CPU, chassis, and power fan connectors (4-pin  
CPU_FAN, 3-pin CHA_FAN, 3-pin PWR_FAN)  
USB connectors (10-1 pin USB910,  
USB1112)  
2.  
3.  
4.  
1-23 9.  
1-27  
1-18  
1-23  
LGA1156 CPU Socket  
DDR3 DIMM slots  
1-3  
1-8  
10. Clear RTC RAM (3-pin CLRTC)  
Digital audio connector  
11.  
(4-1 pin SPDIF_OUT)  
Front panel audio connector  
(10-1 pin AAFP)  
5.  
6.  
7.  
Turbo Key II switch  
MemOK! switch  
1-20 12.  
1-24  
1-1  
1-19 13. Onboard LED  
Intel® H55 Serial ATA connectors  
(7-pin SATA 1-6)  
1-25 14. Serial port connector (10-1 pin COM1)  
1-24  
1-2  
Chapter 1: Product introduction  
 
1.3  
Central Processing Unit (CPU)  
The motherboard comes with a surface mount LGA1156 socket designed for the Intel®  
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.  
1.3.1  
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 P7H55/USB3  
1-3  
 
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 by lifting the tab only.  
PnP cap  
Cap tab  
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  
1-4  
Chapter 1: Product introduction  
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 P7H55/USB3  
1-5  
1.3.2  
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
2.  
Push down two fasteners at a time in  
a diagonal sequence to secure the  
heatsink and fan assembly in place.  
B
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.  
1-6  
Chapter 1: Product introduction  
 
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.  
1.3.3  
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
B
2.  
3.  
Rotate each fastener counterclockwise.  
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 P7H55/USB3  
1-7  
 
1.4  
System memory  
1.4.1  
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):  
1-8  
Chapter 1: Product introduction  
 
1.4.2  
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.  
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, 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 2.4  
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  
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 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 P7H55/USB3  
1-9  
 
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-2200MHz  
capability for Intel Lynnfield CPU  
DIMM socket  
support (Optional)  
Vendor  
Part No.  
Size  
SS/DS  
Chip Brand  
Chip NO.  
Timing  
Voltage  
A*  
B*  
C*  
F3-17600CL9D-4GBTDS 4GB  
(XMP) (2 x 2GB)  
G.SKILL  
DS  
-
-
9-9-9-24  
1.65  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-2133MHz  
capability for Intel Lynnfield CPU  
DIMM socket  
support (Optional)  
Vendor Part No.  
Size  
SS/DS  
Chip Brand  
Chip NO.  
Timing  
Voltage  
A*  
B*  
C*  
4GB  
(2 x 2GB)  
GEIL  
GE34GB2133C9DC (XMP)  
DS  
-
-
9-9-9-28  
1.65  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-2000MHz  
capability for Intel Lynnfield CPU  
DIMM socket  
support (Optional)  
Vendor  
Part No.  
Size  
SS/DS Chip Brand  
Chip NO.  
Timing  
Voltage  
A*  
B*  
C*  
3GB  
(3 x 1GB)  
KINGSTON KHX2000C8D3T1K3/3GX (XMP)  
KINGSTON KHX2000C9D3T1K3/3GX (XMP)  
SS  
SS  
-
-
-
-
8
9
1.65  
1.65  
3GB  
(3 x 1GB)  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1866MHz  
capability for Intel Lynnfield CPU  
DIMM socket  
support (Optional)  
Vendor  
Part No.  
Size  
SS/DS Chip Brand Chip NO. Timing  
Voltage  
A*  
B*  
C*  
Super  
Talent  
W1866UX2GB(XMP)  
2GB(2 x 1GB)  
SS  
SS  
-
-
-
-
8-8-8-24  
8-8-8-24  
-
Patriot  
PVS32G1866LLK(XMP) 2GB(2 x 1GB)  
1.9  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1800MHz  
capability for Intel Lynnfield CPU  
DIMM socket  
support (Optional)  
Vendor  
Part No.  
Size  
SS/DS Chip Brand  
Chip NO.  
Timing  
Voltage  
A*  
B*  
C*  
KINGSTON KHX1800C9D3T1K3/6GX(XMP) 6GB(3 x 2GB) DS  
-
-
-
1.65  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1600MHz  
capability for Intel Lynnfield CPU  
DIMM socket support  
(Optional)  
SS/  
DS  
Chip  
Brand NO.  
Chip  
Vendor  
Part No.  
Size  
Timing  
Voltage  
A*  
B*  
C*  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
CORSAIR  
CORSAIR  
Crucial  
AD31600G001GMU  
1GB  
SS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
9-9-9-24  
9-9-9-24  
9-9-9-24  
7-7-7-20  
7-7-7-20  
8-8-8-24  
8-8-8-24  
-
1.65~1.85  
1.65~1.85  
1.65~1.85  
1.75-1.85  
1.75-1.85  
1.65  
AX3U1600GB1G9-AG  
2GB(2 x 1GB) SS  
3GB(3 x 1GB) SS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
AX3U1600GB1G9-3G  
AD31600F002GMU(XMP)  
AX3U1600XB2G7-FF(XMP)  
TR3X3G1600C8D  
CMD4GX3M2A1600C8(XMP)  
BL12864BA1608.8SFB(XMP)  
BL25664BN1608.16FF(XMP)  
F3-12800CL9D-2GBNQ  
F3-12800CL9D-4GBRL  
F3-12800CL7D-4GBRH(XMP)  
1.65  
1GB  
2GB  
SS  
DS  
1.8  
Crucial  
8-8-8-24  
-
1.65  
G.SKILL  
G.SKILL  
G.SKILL  
2GB(2 x 1GB) SS  
2GB(2 x 1GB) SS  
4GB(2 x 2GB) DS  
1.6  
-
1.6  
7-7-7-24  
1.65  
1-10  
Chapter 1: Product introduction  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1600MHz  
capability for Intel Lynnfield CPU (continued)  
DIMM socket support  
(Optional)  
SS/  
DS  
Chip  
Brand NO.  
Chip  
Vendor  
Part No.  
Size  
Timing  
Voltage  
A*  
B*  
C*  
GEIL  
GV34GB1600C8DC  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
2GB(2 x 1GB) DS  
4GB(2 x 2GB) DS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
8-8-8-28  
8
1.6  
KINGSTON KHX1600C8D3T1K2/4GX(XMP)  
1.65  
OCZ  
OCZ  
OCZ3G1600LV3GK  
8-8-8  
7-7-7  
-
1.65  
OCZ3X16004GK(XMP)  
1.9  
Super Talent WB160UX6G8(XMP)  
Cell Shock CS322271  
EK Memory EKM324L28BP8-I16(XMP)  
-
7-7-7-14  
9
1.7-1.9  
-
Elixir  
M2Y2G64CB8HA9N-DG(XMP)  
996657  
2GB  
DS  
-
-
Mushkin  
Mushkin  
Patriot  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
7-7-7-20  
9-9-9-24  
9-9-9-24  
7-7-7-20  
-
998659(XMP)  
1.5-1.6  
1.65  
1.7  
PVT33G1600ELK  
PGS34G1600LLKA  
PATRIOT  
BoxP/N:TXD34096M1600HC6DC-L  
(TXD32048M1600HC6-L)(XMP)  
Team  
4GB(2 x 2GB) DS  
-
-
6-7-6-18  
1.65  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1600MHz  
capability for Intel Clarkdale CPU  
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  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
Crucial  
AD31600G001GMU  
1GB  
SS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
9-9-9-24  
9-9-9-24  
8-8-8-24  
8-8-8-24  
9-9-9-24  
8-8-8-24  
9-9-9-24  
7-7-7-20  
7-7-7-20  
9-9-9-24  
9-9-9-24  
9-9-9-24  
7-7-7-20  
8-8-8-24  
8-8-8-24  
9-9-9-24  
7-7-7-20  
9-9-9-24  
8-8-8-24  
9-9-9-24  
8-8-8-24  
9-9-9-24  
-
1.65~1.85  
1.65~1.85  
1.65-1.85  
1.65-1.85  
1.65~1.85  
1.65-1.85  
1.65~1.85  
1.75-1.85  
1.75-1.85  
1.65~1.85  
1.65~1.85  
1.65~1.85  
1.75-1.85  
1.65  
AX3U1600GB1G9-AG  
2GB(2 x 1GB) SS  
2GB(2 x 1GB) SS  
3GB(3 x 1GB) SS  
3GB(3 x 1GB) SS  
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
3GB(3 x 1GB) SS  
3GB(3 x 1GB) SS  
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
8GB(4 x 2GB) DS  
8GB(4 x 2GB) DS  
AX3U1600PB1G8-2P  
AD31600E001GMU  
AX3U1600GB1G9-3G  
AX3U1600PB1G8-3P  
AX3U1600GB2G9-AG(XMP)  
AX3U1600XB2G7-EF(XMP)  
AD31600F002GMU(XMP)  
AX3U1600GB2G9-3G(XMP)  
AX3U1600GB2G9-3G(XMP)  
AX3U1600GB2G9-3G  
AX3U1600XB2G7-FF(XMP)  
TR3X3G1600C8D  
TR3X3G1600C8DVer2.1(XMP)  
TR3X3G1600C9Ver1.1(XMP)  
CMG4GX3M2A1600C7(XMP)  
CMX4GX3M2A1600C9(XMP)  
TR3X6G1600C8DVer2.1(XMP)  
TR3X6G1600C9Ver2.1(XMP)  
CMD8GX3M4A1600C8(XMP)  
CMX8GX3M4A1600C9(XMP)  
BL12864BA1608.8SFB(XMP)  
BL25664BN1608.16FF(XMP)  
F3-12800CL9D-2GBNQ  
F3-12800CL9D-4GBRL  
1.65  
1.65  
1.65  
1.65  
1.65  
1.65  
1.65  
1.65  
1GB  
2GB  
SS  
DS  
1.8  
Crucial  
8-8-8-24  
-
1.65  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
2GB(2 x 1GB) SS  
2GB(2 x 1GB) SS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
12GB(3 x 4GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
1.6  
-
1.6  
F3-12800CL7D-4GBRH(XMP)  
F3-12800CL8T-6GBPI(XMP)  
F3-12800CL9T-6GBNQ  
7-7-7-24  
8-8-8-21  
9-9-9-24  
-
1.65  
1.6~1.65  
1.5-1.6  
1.65  
KINGSTON KHX1600C9D3K3/12GX(XMP)  
KINGSTON KHX1600C8D3K2/4GX(XMP)  
KINGSTON KHX1600C8D3K2/4GX(XMP)  
8
1.65  
8
1.65  
KINGSTON KHX1600C8D3T1K2/4GX(XMP) 4GB(2 x 2GB) DS  
8
1.65  
KINGSTON KHX1600C9D3K3/6GX(XMP)  
6GB(3 x 2GB) DS  
3GB(3 x 1GB) SS  
3GB(3 x 1GB) SS  
9
1.65  
OCZ  
OCZ  
OCZ3G1600LV3GK  
OCZ3P1600LV3GK  
8-8-8  
1.65  
7-7-7  
1.65  
ASUS P7H55/USB3  
1-11  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1600MHz  
capability for Intel Clarkdale CPU (continued)  
DIMM socket  
support  
(Optional)  
SS/ Chip  
DS Brand  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip NO.  
Voltage  
A*  
B*  
C*  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ  
OCZ3OB1600LV4GK  
OCZ3P1600LV4GK  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
9-9-9  
7-7-7  
7-7-7  
8-8-8  
7-7-7  
8-8-8  
8-8-8  
8-8-8  
-
1.65  
1.65  
1.9  
OCZ3X16004GK(XMP)  
OCZ3X1600LV4GK(XMP)  
OCZ3FXE1600C7LV6GK  
OCZ3G1600LV6GK  
1.65  
1.65  
1.65  
1.65  
1.65  
-
OCZ3X1600LV6GK(XMP)  
OCZ3X1600LV6GK(XMP)  
Super Talent WB160UX6G8(XMP)  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1333MHz  
capability for Intel Lynnfield CPU  
DIMM socket  
support (Optional)  
Vendor  
Part No.  
Size  
SS/DS Chip Brand Chip NO.  
Timing  
Voltage  
A*  
B*  
C*  
A-DATA  
A-DATA  
A-DATA  
CORSAIR  
AD3133301GOU  
1GB  
2GB  
2GB  
SS  
DS  
DS  
A-DATA  
A-DATA  
A-DATA  
-
AD30908C8D-15IG  
AD30908C8D-15IG  
AD30908C8D-15IG  
-
-
-
-
-
-
-
AD31333002GOU  
AD3U1333B2G9-2  
TR3X3G1333C9 (Ver2.1)  
3GB(3 x 1GB) SS  
9-9-9-24 1.5  
BoxP/N:TWIN3X2048-  
1333C9  
CORSAIR  
2GB(2 x 1GB) DS  
-
-
9-9-9-24 1.70  
(CM3X1024-1333C9)Ver1.1  
Crucial  
CT12864BA1339.8FF  
1GB  
SS  
DS  
SS  
DS  
MICRON  
D9KPT  
9
-
Crucial  
BL25664BN1337.16FF(XMP) 2GB  
-
-
7-7-7-24 1.65  
ELPIDA  
ELPIDA  
G.SKILL  
EBJ10UE8BAW0-DJ-E  
EBJ21UE8BAW0-DJ-E  
F3-10600CL8D-2GBHK  
1GB  
2GB  
ELPIDA  
ELPIDA  
-
J1108BABG-DJ-E  
9
9
-
-
J1108BABG-DJ-E  
-
-
2GB(2 x 1GB) SS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
1.65  
F3-10666CL8D-  
4GBHK(XMP)  
G.SKILL  
-
-
8-8-8-21 1.5-1.6  
9-9-9-24 1.3  
GEIL  
Hynix  
Hynix  
GG34GB1333C9DC  
HMT112U6BFR8C-H9  
HMT125U6BFR8C-H9  
GEIL  
Hynix  
Hynix  
GL1L128M88BA12N  
H5TQ1G83BFR  
1GB  
2GB  
SS  
DS  
9
9
-
-
H5TQ1G83BFRH9C  
IDSH1G-03A1F1C-  
13H  
KINGSTON KVR1333D3N9/2G  
2GB  
DS  
Qimonda  
9
1.5  
KINGSTON KVR1333D3N9/4G  
4GB  
1GB  
2GB  
DS  
SS  
DS  
SAMSUNG K4B2G0846B-HCH9  
9
1.5  
MICRON  
MICRON  
OCZ  
MT8JTF12864AZ-1G4F1  
MT16JTF25664AZ-1G4F1  
OCZ3P1333LV3GK  
OCZX1333LV6GK(XMP)  
AL7F8G73D-DG1  
MICRON  
MICRON  
-
9FF22 D9KPT  
9
-
9FF22 D9KPT  
9
-
3GB(3 x 1GB) SS  
6GB(3 x 2GB) DS  
-
7-7-7  
1.65  
OCZ  
NA  
-
8-8-8  
1.6  
PSC  
1GB  
2GB  
1GB  
2GB  
2GB  
1GB  
1GB  
2GB  
SS  
DS  
SS  
DS  
DS  
DS  
SS  
DS  
PSC  
A3P1GF3DGF  
A3P1GF3DGF  
-
-
-
-
-
-
-
-
-
-
-
-
-
PSC  
AL8F8G73D-DG1  
PSC  
-
SAMSUNG  
SAMSUNG  
Asint  
M378B2873EH1-CH9  
M378B5673EH1-CH9  
SLZ3128M8-EDJE  
N/A  
SAMSUNG K4B1G0846E  
SAMSUNG K4B1G0846E  
-
-
ELPIDA  
-
J1108BASE-DJ-E  
-
-
ASUS  
-
ATP  
AQ28M72D8BJH9S  
AQ56M72E8BJH9S  
FSH1333D3G-T3G(XMP)  
FSX1333D3G-2G  
SAMSUNG K4B1G0846D(ECC)  
SAMSUNG K4B1G0846D(ECC)  
-
ATP  
-
BUFFALO  
BUFFALO  
3GB(3 x 1GB) SS  
2GB DS  
4GB(2 x 2GB) DS  
2GB DS  
-
-
-
-
-
-
-
-
-
-
-
-
7-7-7-20  
-
EK Memory EKM324L28BP8-I13  
9
-
Elixir  
M2Y2G64CB8HA9N-CG  
PVT33G1333ELK  
Patriot  
Patriot  
3GB(3 x 1GB) SS  
6GB(3 x 2GB) DS  
9-9-9-24 1.65  
9-9-9-24 1.65  
PVT36G1333ELK  
Silicon  
Power  
SP001GBLTU1333S01  
SP002GBLTU133S02  
1GB  
2GB  
SS  
DS  
NANYA  
NT5CB128M8AN-CG  
-
-
-
Silicon  
Power  
S-POWER I0YT3E0  
9
1-12  
Chapter 1: Product introduction  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1333MHz  
capability for Intel Clarkdale CPU  
DIMM socket  
support  
(Optional)  
SS/  
DS  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip Brand Chip NO.  
Voltage  
A*  
B*  
C*  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
CORSAIR  
CORSAIR  
AD3133301GOU  
1GB  
SS A-DATA  
AD30908C8D-15IG  
-
-
-
AX3U1333PB2G7-2P  
AD3U1333C4G9-B  
AD31333E002G0U  
AX3U1333PB2G7-3P  
TR3X3G1333C9 (Ver2.1)  
CM3X2G1333C9  
4GB(2 x 2GB) DS  
-
7-7-7-20  
1.65-1.85  
-
4GB DS Hynix  
H5TQ2G83AFRH9C 1333-9-9-9-24  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
3GB(3 x 1GB) SS  
-
-
-
-
-
-
-
-
7-7-7-20  
7-7-7-20  
9-9-9-24  
9-9-9-24  
1.65-1.85  
1.65-1.85  
1.5  
2GB  
DS  
1.5  
BoxP/N:TW3X4G1333C9DHX  
(CM3X2048-  
CORSAIR  
4GB(2 x 2GB) DS  
-
-
9-9-9-24  
1.70  
1333C9DHX)Ver3.2  
CORSAIR  
CORSAIR  
Crucial  
TR3X6G1333C9 (Ver2.1)  
CMX8GX3M4A1333C9  
CT12864BA1339.8FF  
6GB(3 x 2GB) DS  
8GB(4 x 2GB) DS  
-
-
-
9-9-9-24  
9-9-9-24  
9
1.5  
1.5  
-
-
1GB  
1GB  
1GB  
SS MICRON  
SS MICRON  
SS MICRON  
D9KPT  
MT8JF12864AY-  
1G4D1  
Crucial  
CT12864BA1339.8SFD  
CT12872BA1339.9FF  
-
-
Crucial  
Crucial  
Crucial  
Crucial  
Crucial  
Crucial  
ELPIDA  
ELPIDA  
ELPIDA  
ELPIDA  
ELPIDA  
ELPIDA  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
GEIL  
D9KPT(ECC)  
9
-
BL25664BN1337.16FF(XMP) 2GB  
DS  
-
-
7-7-7-24  
1.65  
CT25664BA1339.16FF  
CT25664BA1339.16SFD  
CT25672BA1339.18FF  
BL25664BA1336.16SFB1  
EBJ10UE8BAW0-DJ-E  
EBJ10UE8BDF0-DJ-F  
EBJ10UE8EDF0-DJ-F  
EBJ21UE8BAW0-DJ-E  
EBJ21UE8BDF0-DJ-F  
EBJ21UE8EDF0-DJ-F  
F3-10600CL7D-2GBPI  
F3-10600CL8D-2GBHK  
2GB  
2GB  
2GB  
DS MICRON  
DS MICRON  
DS MICRON  
D9KPT  
9
-
D9JNM  
-
-
D9KPT(ECC)  
9
-
4GB(2 x 2GB) DS NA  
-
6-6-6-20  
1.8  
1GB  
1GB  
1GB  
2GB  
2GB  
2GB  
SS ELPIDA  
J1108BABG-DJ-E  
9
-
SS ELPIDA  
SS ELPIDA  
DS ELPIDA  
DS ELPIDA  
DS ELPIDA  
J1108BDSE-DJ-F  
-
-
J1108EDSE-DJ-F  
-
-
J1108BABG-DJ-E  
9
-
J1108BDSE-DJ-F  
-
-
J1108EDSE-DJ-F  
-
-
2GB(2 x 1GB) SS  
2GB(2 x 1GB) SS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.65  
1.65  
1.5-1.6  
1.5  
-
F3-10666CL7T-6GBPK(XMP) 2GB  
DS  
7-7-7-18  
7-7-7-21  
7-7-7-21  
8-8-8-21  
8-8-8-21  
9-9-9-24  
F3-10666CL7D-4GBPI(XMP) 4GB(2 x 2GB) DS  
F3-10666CL7D-4GBRH(XMP) 4GB(2 x 2GB) DS  
F3-10666CL8D-4GBHK(XMP) 4GB(2 x 2GB) DS  
F3-10666CL8D-4GBRM(XMP) 4GB(2 x 2GB) DS  
1.5  
1.5-1.6  
1.5-1.6  
1.5  
F3-10666CL9T-6GBNQ  
GG34GB1333C9DC  
HMT112U6BFR8C-H9  
HMT125U6BFR8C-H9  
HMT125U6BFR8C-H9  
6GB(3 x 2GB) DS  
4GB(2 x 2GB) DS GEIL  
GL1L128M88BA12N 9-9-9-24  
1.3  
Hynix  
1GB  
2GB  
2GB  
SS Hynix  
DS Hynix  
DS Hynix  
H5TQ1G83BFR  
H5TQ1G83BFR  
H5TQ1G83BFRH9C  
9
9
9
-
Hynix  
-
Hynix  
-
IDSH1G-03A1F1C-  
13H  
KINGSTON KVR1333D3N9/2G  
KINGSTON KVR1333D3N9/4G  
2GB  
DS Qimonda  
9
1.5  
4GB  
1GB  
2GB  
DS SAMSUNG K4B2G0846B-HCH9  
9
1.5  
-
MICRON  
MICRON  
OCZ  
MT8JTF12864AZ-1G4F1  
MT16JTF25664AZ-1G4F1  
OCZ3RPX1333EB2GK  
OCZ3G1333LV3GK  
OCZ3P1333LV3GK  
OCZ3G1333ULV4GK  
OCZ3RPX1333EB4GK  
OCZ3G1333LV6GK  
OCZ3P1333LV6GK  
OCZX1333LV6GK(XMP)  
AL7F8G73D-DG1  
SS MICRON  
DS MICRON  
9FF22 D9KPT  
9
9FF22 D9KPT  
9
-
2GB(2 x 1GB) SS NANYA  
-
6-5-5  
1.85  
1.65  
1.65  
1.65  
1.85  
1.65  
1.65  
1.6  
-
OCZ  
3GB(3 x 1GB) SS  
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
-
-
-
-
-
-
-
9-9-9  
OCZ  
-
7-7-7  
OCZ  
-
8-8-8  
OCZ  
-
-
OCZ  
-
9-9-9  
OCZ  
-
7-7-7  
OCZ  
6GB(3 x 2GB) DS NA  
-
8-8-8  
PSC  
1GB  
2GB  
1GB  
1GB  
1GB  
SS PSC  
DS PSC  
A3P1GF3DGF  
A3P1GF3DGF  
-
PSC  
AL8F8G73D-DG1  
-
-
SAMSUNG M378B2873DZ1-CH9  
SAMSUNG M378B2873EH1-CH9  
SAMSUNG M391B2873DZ1-CH9  
SS SAMSUNG K4B1G0846D  
SS SAMSUNG K4B1G0846E  
SS SAMSUNG K4B1G0846D(ECC)  
9
-
-
-
9
-
ASUS P7H55/USB3  
1-13  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1333MHz  
capability for Intel Clarkdale CPU (continued)  
DIMM socket  
support  
(Optional)  
SS/  
DS  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip Brand Chip NO.  
Voltage  
A*  
B*  
C*  
SAMSUNG M378B5673DZ1-CH9  
SAMSUNG M378B5673EH1-CH9  
SAMSUNG M391B5673DZ1-CH9  
SAMSUNG M378B5273BH1-CH9  
Super Talent W1333UX2GB(XMP)  
2GB  
2GB  
2GB  
4GB  
DS SAMSUNG K4B1G0846D  
DS SAMSUNG K4B1G0846E  
DS SAMSUNG K4B1G0846D(ECC)  
DS SAMSUNG K4B2G0846B-HCH9  
9
-
-
-
9
-
9
-
2GB(2 x 1GB) SS  
-
-
8
1.8  
Transcend  
Transcend  
Asint  
TS128MLK64V3U  
TS256MLK64V3U  
SLY3128M8-EDJ  
1GB  
2GB  
1GB  
1GB  
1GB  
1GB  
2GB  
2GB  
1GB  
SS SAMSUNG K4B1G0846D  
DS SAMSUNG K4B1G0846D  
9
-
9
-
SS Asint  
DDRIII1208-DJ  
-
-
Asint  
SLY3128M8-EDJE  
AQ28M64A8BJH9S  
AQ28M72D8BJH9S  
AQ56M64B8BJH9S  
AQ56M72E8BJH9S  
FSX1333D3G-1G  
FSH1333D3G-T3G(XMP)  
SS ELPIDA  
J1108BASE-DJ-E  
-
-
ATP  
SS SAMSUNG K4B1G0846E  
SS SAMSUNG K4B1G0846D(ECC)  
DS SAMSUNG K4B1G0846D  
DS SAMSUNG K4B1G0846D(ECC)  
-
-
ATP  
-
-
ATP  
-
-
ATP  
-
-
BUFFALO  
BUFFALO  
SS  
-
-
-
-
-
-
-
-
-
-
-
-
-
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
7-7-7-20  
-
EK Memory EKM324L28BP8-I13  
9
-
Elixir  
M2Y2G64CB8HA9N-CG  
PDC32G1333LLK  
PVS34G1333ELK  
PVT36G1333ELK  
2GB  
1GB  
DS  
-
-
Patriot  
Patriot  
Patriot  
SS PATRIOT  
7
1.7  
1.5  
1.65  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
-
-
9-9-9-24  
9-9-9-24  
Silicon  
Power  
NT5CB128M8AN-  
CG  
SP001GBLTU1333S01  
SP001GBLTU133S02  
1GB  
1GB  
SS NANYA  
-
-
-
Silicon  
Power  
SS S-POWER  
I0YT3E0  
9
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1067MHz  
capability for Intel Lynnfield CPU  
DIMM socket  
support (Optional)  
Vendor  
Part No.  
Size SS/DS Chip Brand  
Chip NO.  
Timing  
Voltage  
A*  
B*  
C*  
Crucial  
CT12864BA1067.8FF  
CT25664BA1067.16FF  
EBJ10UE8EDF0-AE-F  
EBJ21UE8EDF0-AE-F  
HMT112U6AFP8C-G7N0  
HMT125U6AFP8C-G7N0  
KVR1066D3N7/1G  
1GB SS  
2GB DS  
1GB SS  
2GB DS  
1GB SS  
2GB DS  
1GB SS  
2GB DS  
1GB SS  
2GB DS  
4GB DS  
2GB DS  
1GB SS  
2GB DS  
2GB DS  
1GB DS  
MICRON  
MICRON  
ELPIDA  
ELPIDA  
HYNIX  
D9KPT  
7
7
-
-
Crucial  
D9KPT  
-
ELPIDA  
ELPIDA  
Hynix  
J1108EDSE-DJ-F  
J1108EDSE-DJ-F  
H5TQ1G83AFPG7C  
H5TQ1G83AFPG7C  
D1288JEKAPA7U  
D1288JEKAPGA7U  
8ZF22 D9KPV  
8ZF22 D9KPV  
K4B2G0846B-HCF8  
J1108BABG-AE-E  
DDRIII1208-AE  
DDRIII1208-AE  
-
-
-
-
7
7
7
7
7
7
8
7
-
-
Hynix  
HYNIX  
-
KINGSTON  
KINGSTON  
MICRON  
MICRON  
SAMSUNG  
Transcend  
Asint  
KINGSTON  
KINGSTON  
MICRON  
MICRON  
SAMSUNG  
ELPIDA  
Asint  
1.5  
KVR1066D3N7/2G  
1.5  
MT8JTF12864AZ-1G1F1  
MT16JTF25664AZ-1G1F1  
M378B5273BH1-CF8  
TS256MLK64V1U  
-
-
1.5  
-
-
-
-
-
SLY3128M8-EAE  
Asint  
SLZ3128M8-EAE  
Asint  
-
Elixir  
M2Y2G64CB8HA9N-BE  
3DU3191A-10  
-
-
WINTEC  
Qimonda  
IDSH51-03A1F1C-10F  
7
1-14  
Chapter 1: Product introduction  
P7H55/USB3 Motherboard Qualified Vendors Lists (QVL) DDR3-1067MHz  
capability for Intel Clarkdale CPU  
DIMM socket  
support  
(Optional)  
SS/  
DS  
Timing  
Dimm(Bios)  
Vendor  
Part No.  
Size  
Chip Brand Chip NO.  
Voltage  
A*  
B*  
C*  
Crucial  
Crucial  
Crucial  
Crucial  
Crucial  
Crucial  
ELPIDA  
ELPIDA  
ELPIDA  
ELPIDA  
ELPIDA  
Hynix  
CT12864BA1067.8FF  
CT12864BA1067.8SFD  
CT12872BA1067.9FF  
CT25664BA1067.16FF  
CT25664BA1067.16SFD  
CT25672BA1067.18FF  
EBJ10UE8BAW0-AE-E  
EBJ10UE8EDF0-AE-F  
EBJ11UD8BAFA-AG-E  
EBJ21UE8BAW0-AE-E  
EBJ21UE8EDF0-AE-F  
HMT112U6AFP8C-G7N0  
HYMT112U64ZNF8-G7  
HMT125U6AFP8C-G7N0  
HYMT125U64ZNF8-G7  
1GB  
1GB  
1GB  
2GB  
2GB  
2GB  
1GB  
1GB  
1GB  
2GB  
2GB  
1GB  
1GB  
2GB  
2GB  
1GB  
2GB  
2GB  
4GB  
1GB  
1GB  
2GB  
2GB  
4GB  
2GB  
1GB  
2GB  
2GB  
1GB  
SS MICRON  
SS MICRON  
SS MICRON  
DS MICRON  
DS MICRON  
DS MICRON  
SS ELPIDA  
SS ELPIDA  
DS ELPIDA  
DS ELPIDA  
DS ELPIDA  
SS HYNIX  
D9KPT  
7
7
7
7
7
7
7
-
-
D9JNL  
-
D9KPT(ECC)  
-
D9KPT  
-
D9JNL  
-
D9KPT(ECC)  
-
J1108BABG-DJ-E  
J1108EDSE-DJ-F  
J5308BASE-AC-E  
J1108BABG-DJ-E  
J1108EDSE-DJ-F  
H5TQ1G83AFPG7C  
HY5TQ1G831ZNFP-G7  
H5TQ1G83AFPG7C  
HY5TQ1G831ZNFP-G7  
-
-
8
7
-
-
-
-
7
7
7
7
7
7
-
-
Hynix  
SS HYNIX  
-
Hynix  
DS HYNIX  
-
Hynix  
DS HYNIX  
-
KINGSTON KVR1066D3N7/1G  
KINGSTON KVR1066D3N7/2G  
KINGSTON KVR1066D3N7/2G  
KINGSTON KVR1066D3N7/4G  
SS KINGSTON D1288JEKAPA7U  
DS KINGSTON D1288JEKAPGA7U  
1.5  
1.5  
DS ELPIDA  
J1108BABG-DJ-E  
1.5  
DS SAMSUNG K4B2G0846B-HCF8  
-
1.5  
MICRON  
MICRON  
MICRON  
MICRON  
MT8JTF12864AY-1G1D1  
MT8JTF12864AZ-1G1F1  
MT16JTF25664AY-1G1D1  
MT16JTF25664AZ-1G1F1  
SS MICRON  
SS MICRON  
DS MICRON  
DS MICRON  
7VD22  
7
7
7
7
8
7
-
-
8ZF22 D9KPV  
7VD22  
-
-
8ZF22 D9KPV  
-
SAMSUNG M378B5273BH1-CF8  
DS SAMSUNG K4B2G0846B-HCF8  
1.5  
Transcend  
Asint  
TS256MLK64V1U  
SLY3128M8-EAE  
SLZ3128M8-EAE  
M2Y2G64CB8HA9N-BE  
3DU3191A-10  
DS ELPIDA  
SS Asint  
DS Asint  
J1108BABG-AE-E  
DDRIII1208-AE  
DDRIII1208-AE  
-
-
-
-
-
-
Asint  
-
Elixir  
DS  
-
-
WINTEC  
DS Qimonda  
IDSH51-03A1F1C-10F  
7
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.  
Based on the Intel® specification, you can only install one X.M.P. DIMM per channel.  
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 2.4  
Ai Overclock Tuner for details.  
Visit the ASUS website for the latest QVL.  
ASUS P7H55/USB3  
1-15  
1.4.3  
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.  
DIMM notch  
1.  
2.  
Unlock a DIMM socket by pressing  
the retaining clips outward.  
1
Align a DIMM on the socket such that  
the notch on the DIMM matches the  
DIMM slot key on the socket.  
2
1
DIMM slot key 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 in the wrong direction to avoid damaging the DIMM.  
3.  
Hold the DIMM by both of its ends,  
then insert the DIMM vertically into  
3
the socket. Apply force to both ends  
of the DIMM simultaneously until the  
retaining clips snap back into place,  
and the DIMM cannot be pushed in  
any further to ensure proper sitting of  
the DIMM.  
3
Locked Retaining Clip  
Always insert the DIMM into the socket VERTICALLY to prevent DIMM notch damage.  
1.4.4  
Removing a DIMM  
1.  
Simultaneously press the retaining  
clips outward to unlock the DIMM.  
2
2.  
Remove the DIMM from the socket.  
1
1
Support the DIMM lightly with your fingers when pressing the retaining clips. The DIMM  
might get damaged when it flips out with extra force.  
1-16  
Chapter 1: Product introduction  
 
1.5  
Expansion slot  
In the future, you may need to install expansion cards. The following sub-sections describe  
the slot and the expansion cards that it supports.  
Unplug the power cord before adding or removing expansion cards. Failure to do so may  
cause you physical injury and damage motherboard components.  
1.5.1  
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.  
Secure the card to the chassis with the screw you removed earlier.  
Replace the system cover.  
6.  
1.5.2  
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 2 for  
information on BIOS setup.  
2.  
3.  
Assign an IRQ to the card.  
Install the software drivers for the expansion card.  
1.5.3  
PCI slots  
The PCI slots support cards such as a LAN card, SCSI card, USB card, and other cards that  
comply with PCI specifications.  
1.5.4  
PCI Express x1 slots  
This motherboard supports PCI Express x1 network cards, SCSI cards and other cards that  
comply with the PCI Express specifications.  
1.5.5  
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 section 1.2 Motherboard overview for the location of the expansion slot.  
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.  
Connect a chassis fan to the motherboard connector labeled CHA_FAN when using  
multiple graphics cards for better thermal environment.  
ASUS P7H55/USB3  
1-17  
 
1.6  
Jumpers  
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. Turn OFF the computer and unplug the power cord.  
2. 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. Plug the power cord and turn ON the computer.  
4. 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.  
1-18  
Chapter 1: Product introduction  
 
1.7  
Onboard switches  
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.  
1.  
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.  
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.  
Press the MemOK! switch under Windows™ OS environment will reboot the computer  
and start memory tuning.  
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.  
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  
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 unplog the power cord for about 5–10 seconds.  
If your system fail to boot due to BIOS overclocking, press the MemOK! switch to boot  
and load BIOS default settings. A messgae will appear during POST reminding you that  
the BIOS has been restored to its default settings.  
ASUS P7H55/USB3  
1-19  
 
2.  
Turbo Key II switch  
This switch allows you to auto-tune your CPU to enhance the system performance.  
For ensuring the system performance, turn the switch setting to Enable when the system  
is powered off.  
The LED near the Turbo Key II switch lights when the switch setting is turned to Enable.  
If you clear the CMOS or load the BIOS setup defaults, the related overclocking items in  
the BIOS menu follow the current setting of the Turbo Key II switch.  
If you change the switch setting to Enable under the OS environment, the Turbo Key II  
function will be activated after the next system bootup.  
You may use the TurboV Auto Tuning, overclock in the BIOS setup program, and enable  
the Turbo Key II function at the same time. However, the system will use the last setting  
you have made.  
1-20  
Chapter 1: Product introduction  
1.8  
Connectors  
1.8.1  
Rear panel connectors  
1.  
2.  
PS/2 mouse port (green). This port is for a PS/2 mouse.  
LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)  
through a network hub. Refer to the table on the next page for the LAN port LED  
indicators.  
ACT/LINK SPEED  
ACT/LINK LED  
Status  
SPEED LED  
Status  
LED  
LED  
Description  
No link  
Description  
OFF  
OFF  
10 Mbps connection  
100 Mbps connection  
1 Gbps connection  
ORANGE  
BLINKING  
Linked  
ORANGE  
GREEN  
Data activity  
LAN port  
3.  
4.  
Center/Subwoofer port (orange). This port connects the center/subwoofer speakers.  
Rear Speaker Out port (black). This port connects the rear speakers in a 4-channel,  
6-channel, or 8-channel audio configuration.  
5.  
6.  
Line In port (light blue). This port connects the tape, CD, DVD player, or other audio  
sources.  
Line Out port (lime). This port connects a headphone or a speaker. In 4-channel,  
6-channel, and 8-channel configuration, the function of this port becomes Front  
Speaker Out.  
7.  
8.  
PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.  
USB 3.0 ports 1 and 2 (blue). These 4-pin Universal Serial Bus (USB) ports are  
available for connecting USB 3.0 devices.  
9.  
Optical S/PDIF Out port. This port connects an external audio output device via an  
optical S/PDIF cable.  
10. USB 2.0 ports 5 and 6. These 4-pin Universal Serial Bus (USB) ports are available for  
connecting USB 2.0 devices.  
11. USB 2.0 ports 3 and 4. These 4-pin Universal Serial Bus (USB) ports are available for  
connecting USB 2.0 devices.  
12. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports connect to  
USB 2.0/1.1 devices.  
13. Side Speaker Out port (gray). This port connects the side speakers in an 8-channel  
audio configuration.  
14. Microphone port (pink). This port connects a microphone.  
Refer to the audio configuration table on the next page for the function of the audio ports in  
2, 4, 6, or 8-channel configuration.  
ASUS P7H55/USB3  
1-21  
 
Audio 2, 4, 6, 8-channel configuration  
Headset  
2-channel  
Port  
4-channel  
6-channel  
8-channel  
Light Blue  
Lime  
Line In  
Line In  
Line In  
Line In  
Line Out  
Front Speaker Out  
Front Speaker Out  
Mic In  
Front Speaker Out  
Mic In  
Pink  
Mic In  
Mic In  
Orange  
Black  
Center/Subwoofer  
Rear Speaker Ou  
Center/Subwoofer  
Rear Speaker Out  
Side Speaker Out  
Rear Speaker Out  
Gray  
1.8.2  
Internal connectors  
1.  
ATX power connectors (24-pin EATXPWR, 4-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 350 W.  
Do not forget to connect the 4-pin EATX12V power plug. Otherwise, the system will not  
boot.  
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.  
1-22  
Chapter 1: Product introduction  
 
2.  
CPU, chassis, and power fan connectors  
(4-pin CPU_FAN, 3-pin CHA_FAN, 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 (48 W max.) at +12V. Connect the fan cables to the fan connectors on the  
motherboard, making sure that the black wire of each cable matches the ground pin of  
the connector.  
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 and CHA_FAN 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_FAN for better thermal environment.  
3.  
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.  
ASUS P7H55/USB3  
1-23  
4.  
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].  
5.  
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.  
1-24  
Chapter 1: Product introduction  
6.  
Intel® H55 Serial ATA connectors (7-pin SATA1-6)  
These connectors are for the Serial ATA signal cables for Serial ATA hard disk drives  
and optical disc drives.  
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.  
You must install Windows® XP Service Pack 2 or later version before using Serial ATA  
hard disk drives.  
When using hot-plug and NCQ, set the Configure SATA as item in the BIOS to [AHCI].  
See section Storage Configuration for details.  
ASUS P7H55/USB3  
1-25  
7.  
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.  
1-26  
Chapter 1: Product introduction  
8.  
USB connectors (10-1 pin USB910, USB1112)  
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.  
The USB module is purchased separately.  
ASUS P7H55/USB3  
1-27  
1.9  
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.  
1.10  
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  
1.10.1  
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  
The Manual menu contains  
The Drivers menu shows the available  
device drivers if the system detects  
installed devices. Install the necessary  
drivers to use the devices.  
contains items to  
the list of supplementary user  
create the RAID/AHCI  
manuals. Click an item to open  
driver disk.  
the folder of the user manual.  
Click the Contact  
tab to display the  
ASUS contact  
The Utilities  
menu shows the  
applications and  
information.  
Click an icon  
to display DVD/  
motherboard  
information  
other software that  
the motherboard  
supports.  
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.  
1-28  
Chapter 1: Product introduction  
 
Chapter 2  
BIOS setup  
2.1  
Managing and updating your BIOS  
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.  
2.1.1  
ASUS Update  
The ASUS Update is a utility that allows you to manage, save, and update the motherboard  
BIOS in Windows® environment.  
ASUS Update requires an Internet connection either through a network or an Internet  
Service Provider (ISP).  
This utility is available in the support DVD that comes with the motherboard package.  
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.  
From the dropdown list, select any of the updating process.  
Updating from the Internet  
2.  
a. Select Update BIOS from the Internet, and then click Next.  
b. Select the ASUS FTP site nearest you to avoid network traffic, or click Auto  
elect. Click Next.  
c. From the FTP site, select the BIOS  
version that you wish to download, then click Next.  
ASUS P7H55/USB3  
2-1  
 
Updating from a BIOS file  
a. Select Update BIOS from a file, then click Next.  
b. Locate the BIOS file from the Open window, then click Open.  
Follow the onscreen instructions to complete the update process.  
3.  
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 Exit Menu for details.  
2.1.2  
ASUS EZ Flash 2  
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 file from the ASUS website at  
To update the BIOS using EZ Flash 2:  
1.  
Insert the USB flash disk that contains the latest BIOS file to the USB port, 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 V4.12  
Current ROM  
BOARD: P7H55-USB3  
VER: 0108  
Update ROM  
BOARD: Unknown  
VER: Unknown  
DATE: 04/21/2010  
DATE: Unknown  
PATH: A:\  
A:  
Note  
[Enter] Select or Load  
[Tab] Switch [V] Drive Info  
[Up/Down/Home/End] Move [B] Backup  
[ESC] Exit  
2-2  
Chapter 2: BIOS information  
 
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!  
2.1.3  
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!  
ASUS P7H55/USB3  
2-3  
 
2.2  
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.  
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 Setups Default item under the Exit Menu. See section 2.9 Exit menu.  
The BIOS setup screens shown in this section are for reference purposes only, and may  
not exactly match what you see on your screen.  
motherboard.  
2.3  
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 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  
[14:01:22]  
[Thu 05/03/2010]  
[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]  
Storage Configuration  
System Information  
2-4  
Chapter 2: BIOS information  
 
2.3.1  
SATA 1-6  
While entering Setup, the BIOS automatically detects the presence of IDE/SATA devices.  
There is a separate submenu for each IDE/SATA device. Select a device item then press  
<Enter> to display the SATA device information.  
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. These items show N/A if no IDE device is installed in the  
system.  
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 either 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-sectors 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 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 much less 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 the 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.  
ASUS P7H55/USB3  
2-5  
 
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.  
2.3.2  
Storage Configuration  
The Storage Configuration menu allows you to configure your storage devices. Select an  
item then press <Enter> to display the submenu.  
SATA Configuration [Enhanced]  
Configuration options: [Disabled] [Compatible] [Enhanced]  
Configure SATA as [IDE]  
Sets the configuration for the Serial ATA connectors supported by the Southbridge chip.  
Configuration options: [IDE] [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.  
Hard Disk Write Protect [Disabled]  
Disables or enables device write protection. This will be effective only if the device is  
accessed through BIOS. Configuration option: [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]  
2.3.3  
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].  
SATA Port1–6 [XXXX]  
Displays the status of auto-detection of SATA devices.  
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]  
2-6  
Chapter 2: BIOS information  
 
2.3.4  
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.  
ASUS P7H55/USB3  
2-7  
 
2.4  
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  
Warning: this function  
belongs to overclock-  
ing, and it may cause  
instability.  
Target CPU Frequency: 2926MHz  
Target DRAM Frequency: 1600MHz  
Select a CPU level,  
and the rest will be  
auto-adjusted. If you  
want to adjust more,  
set Ai Overclock Tuner  
to Manual after you  
select a CPU level.  
CPU Level Up  
[Auto]  
--------------------------------------------------  
Ai Overclock Tuner  
CPU Ratio Setting  
[Auto]  
[Auto]  
Intel(R) SpeedStep(TM) Tech  
Intel(R) TurboMode Tech  
Xtreme Phase Full Power Mode  
DRAM Frequency  
[Enabled]  
[Enabled]  
[Auto]  
[Auto]  
QPI Frenquency  
ASUS/3rd Party UI Priority  
[Auto]  
←→  
↑↓  
Select Screen  
Select Item  
Change Option  
General Help  
Save and Exit  
Exit  
[ASUS Utility]  
+-  
F1  
OC Tuner  
Start auto tuning  
[Turbo Profile]  
F10  
ESC  
DRAM Timing Control  
v02.61 (C)Copyright 1985-2010, American Megatrends, Inc.  
Scroll down to display the following items:  
CPU Differential Amplitude  
CPU Clock Skew  
[Auto]  
[Auto]  
******* Please key in numbers directly! *******  
CPU Voltage Mode  
[Offset]  
[Auto]  
Offset Voltage  
Current CPU Core Voltage  
IMC Voltage  
[ 1.232V]  
[Auto]  
Current IMC Voltage  
DRAM Voltage  
[ 1.106V]  
[Auto]  
Current DRAM Voltage  
CPU PLL Voltage  
[ 1.496V]  
[Auto]  
Current CPU PLL Voltage  
PCH Voltage  
[ 1.790V]  
[Auto]  
Current PCH Voltage  
DRAM DATA REF Voltage on CHA  
DRAM DATA REF Voltage on CHB  
[ 1.037V]  
[Auto]  
[Auto]  
***********************************************  
Load-Line Calibration  
CPU Spread Spectrum  
PCIE Spread Spectrum  
[Auto]  
[Auto]  
[Auto]  
v02.61 (C)Copyright 1985-2010, American Megatrends, Inc.  
2.4.1  
CPU Level Up [Auto]  
Allows you to select a CPU level, and the related parameters will be automatically adjusted  
according to the selected CPU level. If you want to manually configure the settings in detail,  
set Ai Overclock Tuner to [Manual] after selecting a CPU level.  
Configuration options: [Auto] [Crazy-3.08G] [Crazy-3.2G] [Crazy-3.52G]  
The configuration options vary depending on the CPU model you install on the  
motherboard.  
2-8  
Chapter 2: BIOS information  
 
2.4.2  
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:  
Manual  
Auto  
Allows you to individually set overclocking parameters.  
Loads the optimal settings for the system.  
D.O.C.P  
Overclocks DRAM frequency by adjusting BCLK frequency.  
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.  
CPU Level UP  
Loads settings for using CPU Level UP.  
The configuration options for the following sub-item vary depending on the DIMMs you  
install on the motherboard.  
DRAM O.C. Profile [DDR3-1800MHz]  
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: [DDR3-1800MHz] [DDR3-1866MHz] [DDR3-2000MHz] [DDR3-  
2133MHz] [DDR3-2200MHz]  
Clarkdale CPU  
Frequency (GHz)  
Lynnfield CPU Frequency (GHz)  
DRAM Frequency  
(MHz)  
2.66  
2.8  
2.93  
Auto  
Auto  
2.8  
Others  
Auto  
1333  
Auto  
Auto  
Auto  
D.O.C.P.  
D.O.C.P.  
N/A  
1600  
D.O.C.P.  
D.O.C.P.  
D.O.C.P.  
N/A  
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: [Profile #1] [Profile #2]  
To obtain the best performance of the X.M.P. DIMM or 1600MHz DIMM, install only one  
DIMM on each memory channel.  
2.4.3  
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.  
ASUS P7H55/USB3  
2-9  
 
2.4.4  
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]  
2.4.5  
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]  
2.4.6  
Xtreme Phase Full Power Mode [Auto]  
[Auto]  
Automatic configuration.  
[Enabled]  
Enables Full Power Mode to ensure the best CPU overclocking  
performance.  
BCLK Frequency [XXX]  
This item appears when you set the AI Overclock Tuner item to [Manual], [D.O.C.P.] or  
[X.M.P.] and 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]  
This item appears only when you set the AI Overclock Tuner item to [Manual] and allows  
you to set the PCI Express frequency. Use the <+> and <-> keys to adjust the PCIE  
frequency. The values range from 100 to 200.  
2.4.7  
DRAM Frequency [Auto]  
Allows you to set the DDR3 operating frequency.  
Configuration options when set the AI Overclock Tuner item to [Auto] or [X.M.P.]:  
[Auto] [DDR3-800MHz] [DDR3-1066MHz] [DDR3-1333MHz] [DDR3-1600]  
Configuration options when set the AI Overclock Tuner item to [D.O.C.P]:  
[Auto] [DDR3-900MHz] [DDR3-1200MHz] [DDR3-1500MHz] [DDR3-1800]  
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  
2.4.2 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.  
2.4.8  
QPI Frequency [Auto]  
Allows you to set the QuickPath Interconnect (QPI) frequency.  
Configuration options: [Auto] [4270MHz] [4800MHz]  
2.4.9  
ASUS/3rd Party UI Priority [ASUS Utility]  
[ASUS Utility]  
Prioritizes the usage of ASUS utilities (ASUS EPU, TurboV EVO, etc.).  
Other 3rd party OC utilities may not be full-functioned.  
[3rd Party Utility] Prioritizes 3rd party OC utilities (IXTU, SetFS, etc.). ASUS utilities can’t be  
launched.  
2-10  
Chapter 2: BIOS information  
 
2.4.10  
OC Tuner [Turbo Profile]  
OC Tuner automatically overclocks the frequency and voltage of CPU and DRAM. Choose  
[Good Performance] or [Better Performance] as a stable setting for daily use. Choose [Turbo  
Profile] as an advanced overclocking setting for special purposes.  
Configuration options: [Good Performance] [Better Performance] [Turbo Profile]  
2.4.11  
Start auto tuning  
Press <Enter> to start auto tuning. It takes around 5 minutes, and the system will reboot for  
several times before finish. After auto tuning, the C-State feature will be disabled.  
2.4.12  
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 the DIMMs  
you install on the motherboard.  
1st Information: 9-9-9-24-5-88-12-8-24-0  
The values vary depending on your settings of the following sub-items:  
CAS# Latency [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [10 DRAM Clock] [11  
DRAM Clock]  
RAS# to CAS# Delay [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [14 DRAM Clock] [15  
DRAM Clock]  
RAS# PRE Time [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [14 DRAM Clock] [15  
DRAM Clock]  
RAS# ACT Time [Auto]  
Configuration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [30 DRAM Clock] [31  
DRAM Clock]  
RAS# to RAS# Delay [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [7 DRAM Clock]  
REF Cycle Time [Auto]  
Configuration options: [Auto] [48 DRAM Clock] [60 DRAM Clock] [72 DRAM Clock]  
[82 DRAM Clock] [88 DRAM Clock] [90 DRAM Clock] [100 DRAM Clock] [110 DRAM  
Clock] [114 DRAM Clock] [118 DRAM Clock] [122 DRAM Clock] [126 DRAM Clock]  
[130 DRAM Clock] [134 DRAM Clock] [138 DRAM Clock] [142 DRAM Clock] [150  
DRAM Clock] [160 DRAM Clock] [170 DRAM Clock] [180 DRAM Clock] [190 DRAM  
Clock] [200 DRAM Clock]  
WRITE Recovery Time [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [18 DRAM Clock]  
READ to PRE Time [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]  
ASUS P7H55/USB3  
2-11  
 
FOUR ACT WIN Time [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [63 DRAM Clock]  
Back-To-Back CAS# Delay [Auto]  
Configuration options: [Auto] [4 DRAM Clock] – [32 DRAM Clock]  
2nd Information: 2N-44-0  
The values vary depending on your settings of the following sub-items:  
Timing Mode [Auto]  
Configuration options: [Auto] [1N] [2N] [3N]  
Round Trip Latency on CHA/B [Auto]  
[Auto] [Advance 15 Clock]–[Advance 1 Clock] [Normal] [Delay 1 Clock]  
[Delay 15 Clock]  
3rd Information: 6-6-18-10-10-10-7-6-4-7-7-4  
The values vary depending on your settings of the following sub-items:  
WRITE to READ Delay(DD) [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [8 DRAM Clock]  
WRITE to READ Delay(DR) [Auto]  
Configuration options: [Auto] [1 DRAM Clock] – [8 DRAM Clock]  
WRITE to READ Delay(SR) [Auto]  
Configuration options: [Auto] [10 DRAM Clock] – [22 DRAM Clock]  
READ to WRITE Delay(DD) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [14 DRAM Clock]  
READ to WRITE Delay(DR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [14 DRAM Clock]  
READ to WRITE Delay(SR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [14 DRAM Clock]  
READ to READ Delay(DD) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
READ to READ Delay(DR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
READ to READ Delay(SR) [Auto]  
Configuration options: [Auto] [4 DRAM Clock] [6 DRAM Clock]  
WRITE to WRITE Delay(DD) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
WRITE to WRITE Delay(DR) [Auto]  
Configuration options: [Auto] [2 DRAM Clock] – [9 DRAM Clock]  
WRITE to WRITE Delay(SR) [Auto]  
Configuration options: [Auto] [4 DRAM Clock] [6 DRAM Clock]  
2-12  
Chapter 2: BIOS information  
2.4.13  
CPU Differential Amplitude [Auto]  
Different AMP might enhance BCLK overclocking ability.  
Configuration options: [Auto] [700mV] [800mV] [900mV] [1000mV]  
2.4.14  
CPU Clock Skew [Auto]  
Adjusting this item may help enhancing BCLK overclocking ability. You may need to adjust  
the CPU Clock Skew item at the same time.  
Configuration options: [Auto] [Normal] [Delay 100ps]–[Delay 1500ps]  
Some of the following 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.  
2.4.15  
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]  
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 when 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 1.7V 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.  
2.4.16  
IMC Voltage [Auto]  
Allows you to set the CPU Integrated Memory Controller voltage. The values range from 1.1V  
to 1.7V with a 0.00625V interval.  
2.4.17  
DRAM Voltage [Auto]  
Allows you to set the DRAM voltage. The values range from 1.2V to 2.0V with a 0.0125V  
interval.  
According to Intel CPU spec, DIMM voltage below 1.65V is recommended to protect the  
CPU.  
ASUS P7H55/USB3  
2-13  
 
2.4.18  
CPU PLL Voltage [Auto]  
Allows you to set the CPU PLL voltage. The values range from 1.8V to 2.5V with a 0.0125V  
interval.  
2.4.19  
PCH Voltage [Auto]  
Allows you to set the Platform Controller Hub voltage. The values range from 1.05V to 1.5V  
with a 0.0125V interval.  
The values of the IMC Voltage, DRAM Voltage, CPU PLL Voltage and PCH Voltage  
items are labeled in different color, indicating the risk levels of high voltage settings.  
Refer to the table on the next page for details.  
The system may need better cooling system to work stably under high voltage settings.  
Blue  
Yellow  
Purple  
Red  
1.10000V–  
1.16875V  
1.17500V–  
1.22500V  
1.23125V–  
1.30000V  
1.30625V–  
1.70000V  
IMC Voltage  
1.2000V–  
1.5625V  
DRAM Voltage  
1.5750V–1.6250V  
1.6375V–1.6875V  
1.7000V–2.0000V  
1.8000V–  
1.8625V  
1.8750V–  
1.9250V  
1.9375-  
1.9875  
2.0000V–  
2.5000V  
CPU PLL Voltage  
PCH Voltage  
1.0500V-  
1.1875V  
1.2000V  
1.3000V  
1.3125V  
1.4500V  
1.4625V-  
1.5000V  
2.4.20  
DRAM DATA REF Voltage on CHA/B [Auto]  
Allows you to set the DRAM DATA Reference Voltage on Channel A/B. The values  
range from 0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM  
overclocking ability.  
2.4.21  
[Auto]  
Load-Line Calibration [Auto]  
Automatic configuration.  
[Disabled]  
[Enabled]  
Follow Intel specifications.  
Improve CPU VDroop directly.  
2.4.22  
[Auto]  
CPU Spread Spectrum [Auto]  
Automatic configuration.  
[Disabled]  
[Enabled]  
Enhances the BCLK overclocking ability.  
Sets to [Enabled] for EMI control.  
2.4.23  
[Auto]  
PCIE Spread Spectrum [Auto]  
Automatic configuration.  
[Disabled]  
[Enabled]  
Enhances the PCIE overclocking ability.  
Sets to [Enabled] for EMI control.  
2-14  
Chapter 2: BIOS information  
 
2.5  
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  
Uncore Configuration  
Onboard Devices Configuration  
USB Configuration  
PCIPnP  
Intel VT-d  
[Disabled]  
←→  
↑↓  
Select Screen  
Select Item  
Enter Go to Sub Screen  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2010, American Megatrends, Inc.  
2.5.1  
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.  
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.  
ASUS P7H55/USB3  
2-15  
 
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 Capability [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.  
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 [Enabled]  
[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.  
2-16  
Chapter 2: BIOS information  
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]  
2.5.2  
Uncore Configuration  
The Uncore Configuration menu allows you to change the advanced chipset settings.  
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.  
2.5.3  
Onboard Device Configuration  
HDA Controller [Enabled]  
[Enabled]  
Enables the High Definition Audio Controller.  
Disables the controller.  
[Disabled]  
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 LAN1 [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.  
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]  
Onboard USB 3.0 Controller [Enabled]  
[Enabled]  
[Disabled]  
Enables the USB 3.0 controller.  
Disables the controller.  
2.5.4  
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.  
The USB Devices Enabled item shows the auto-detected values. If no USB device is  
detected, the item shows None.  
ASUS P7H55/USB3  
2-17  
 
USB Functions [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 [Auto]  
[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.  
2.5.5  
PCIPnP  
The PCIPnP menu items allow you to change the advanced settings for PCI/PnP devices.  
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.  
2.5.6  
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.  
2-18  
Chapter 2: BIOS information  
 
2.6  
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  
Select Screen  
Select Item  
Change Option  
General Help  
Save and Exit  
Exit  
←→  
↑↓  
+-  
F1  
F10  
ESC  
v02.61 (C)Copyright 1985-2010, American Megatrends, Inc.  
2.6.1  
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.  
2.6.2  
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]  
2.6.3  
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.  
2.6.4  
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.  
2.6.5  
EuP Ready [Disabled]  
[Disabled]  
[Enabled]  
Disables the Energy Using Products (EuP) Ready function.  
Allows BIOS to switch off some power at S5 state to get system ready for  
the EuP requirement. When set to [Enabled], power for WOL, WO_USB,  
audio and onboard LEDs will be switched off at S5 state.  
ASUS P7H55/USB3  
2-19  
 
2.6.6  
APM Configuration  
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.  
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.  
2-20  
Chapter 2: BIOS information  
 
2.6.7  
Hardware Monitor  
CPU/MB Temperature [xxx�C/xxx�F]  
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 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]  
[Turbo]  
[Manual]  
Sets to [Silent] to minimize the fan speed for quiet CPU fan operation.  
Sets to [Turbo] to achieve maximum CPU fan speed.  
Sets to [Manual] to assign detailed fan speed control parameters.  
The following items appear only when you set the CPU Q-Fan Profile item to [Manual].  
CPU Upper Temperature [70�C/158�F]  
Sets the upper limit of the CPU temperature.  
Configuration options: [40ºC/104ºF] [50ºC/122ºF] [60ºC/140ºF] [70ºC/158ºF] [80ºC/176ºF]  
[90ºC/194ºF]  
CPU Fan Max. Duty Cycle [100%]  
Sets the maximum CPU fan duty cycle. When the CPU temperature reaches the upper limit, the  
CPU fan will operate at the maximum duty cycle.  
Configuration options: [20%] [30%] [40%] [50%] [60%] [70%] [80%] [90%] [100%]  
CPU Lower Temperature [40�C/104�F]  
Displays the lower limit of the CPU temperature.  
CPU Fan Min. Duty Cycle [20%]  
Chassis Q-Fan Control [Disabled]  
[Disabled]  
[Enabled]  
Disables the Chassis Q-Fan control feature.  
Enables the Chassis Q-Fan control feature.  
ASUS P7H55/USB3  
2-21  
 
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]  
Sets 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.  
2.7  
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 1985-2010, American Megatrends, Inc.  
2.7.1  
Boot Device Priority  
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]  
2.7.2  
Boot Settings Configuration  
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.  
2-22  
Chapter 2: BIOS information  
 
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.  
2.7.3  
Security  
The Security menu items allow you to change the system security settings. Select an item  
then press <Enter> to display the configuration options.  
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>.  
From the password box, type a password composed of at least six letters and/or  
numbers, 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 it by erasing the CMOS Real Time Clock  
(RTC) RAM. See section 1.6 Jumper for information on how to erase the RTC RAM.  
ASUS P7H55/USB3  
2-23  
 
After you have set a supervisor password, the other items appear to allow you to change  
other security settings.  
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>.  
On the password box that appears, type a password composed of at least six letters  
and/or numbers, 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.  
2-24  
Chapter 2: BIOS information  
2.8  
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 1985-2010, American Megatrends, Inc.  
2.8.1  
ASUS O.C. Profile  
This item allows you to store or load multiple BIOS settings.  
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. You can save eight (8) CMOS profiles.  
Load CMOS Profile.  
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.  
This function can support devices such as a USB flash disk or a floppy 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 “xxx.CMO” file can be loaded.  
2.8.2  
AI NET 2  
Check Realtek LAN cable [Disabled]  
Enables or disables checking of the Realtek LAN cable during the Power-On Self-Test  
(POST). Configuration options: [Disabled] [Enabled]  
ASUS P7H55/USB3  
2-25  
 
2.8.3  
ASUS EZ Flash 2  
Allows you to run ASUS EZ Flash 2. When you press <OK>, a confirmation message  
appears. Use the left/right arrow key to select between [Yes] or [No], then press <OK> to  
confirm your choice.  
2.8.4  
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.  
Configuration options: [No] [Reset]  
When setting this item to [Reset], make sure to 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  
(bookmarks, cookies, browsing history, etc.). This is useful in the rare case where corrupt  
settings prevent the Express Gate environment from launching properly.  
The first time wizard will run again when you enter the Express Gate environment after  
clearing its settings.  
2-26  
Chapter 2: BIOS information  
 
2.9  
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 1985-2010, 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.  
ASUS P7H55/USB3  
2-27  
 
2-28  
Chapter 2: BIOS information  
ASUS contact information  
ASUSTeK COMPUTER INC.  
Address  
Telephone  
Fax  
15 Li-Te Road, Peitou, Taipei, Taiwan 11259  
+886-2-2894-3447  
+886-2-2890-7798  
E-mail  
Web site  
Technical Support  
Telephone  
Online support  
+86-21-38429911  
support.asus.com  
ASUS COMPUTER INTERNATIONAL (America)  
Address  
Telephone  
Fax  
800 Corporate Way, Fremont, CA 94539, USA  
+1-812-282-3777  
+1-510-608-4555  
usa.asus.com  
Web site  
Technical Support  
Telephone  
Support fax  
+1-812-282-2787  
+1-812-284-0883  
support.asus.com  
Online support  
ASUS COMPUTER GmbH (Germany and Austria)  
Address  
Fax  
Web site  
Online contact  
Harkort Str. 21-23, D-40880 Ratingen, Germany  
+49-2102-959911  
Technical Support  
Telephone (Component)  
Telephone (System/Note/Eee/LCD)  
Support Fax  
+49-1805-010923*  
+49-1805-010920*  
+49-2102-9599-11  
support.asus.com  
Online support  
* EUR 0.14/minute from a German fixed landline; EUR 0.42/minute from a mobile phone.  

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