Asus Computer Hardware EPU User Manual

P5K/EPU  
Contents  
Contents ...................................................................................................... iii  
Notices........................................................................................................ vii  
Safety information .................................................................................... viii  
About this guide ......................................................................................... ix  
P5K/EPU specifications summary ............................................................ xi  
Chapter 1: Product introduction  
1.1  
1.2  
1.3  
Welcome! ...................................................................................... 1-1  
Package contents......................................................................... 1-1  
Special features............................................................................ 1-2  
1.3.1  
1.3.2  
1.3.3  
Product highlights ........................................................... 1-2  
ASUS AI Lifestyle unique features.................................. 1-4  
ASUS Intelligent Performance and Overclocking .. features.1-6  
Chapter 2: Hardware information  
2.1  
2.2  
Before you proceed ..................................................................... 2-1  
Motherboard overview................................................................. 2-2  
2.2.1  
2.2.2  
2.2.3  
2.2.4  
Placement direction ........................................................ 2-2  
Screw holes .................................................................... 2-2  
Motherboard layout......................................................... 2-3  
Layout contents............................................................... 2-4  
2.3  
2.4  
Central Processing Unit (CPU) ................................................... 2-6  
2.3.1  
2.3.2  
2.3.3  
Installing the CPU ........................................................... 2-7  
Installing the CPU heatsink and fan................................ 2-9  
Uninstalling the CPU heatsink and fan ..........................2-11  
System memory ......................................................................... 2-13  
2.4.1  
2.4.2  
2.4.3  
2.4.4  
Overview....................................................................... 2-13  
Memory configurations.................................................. 2-14  
Installing a DIMM .......................................................... 2-18  
Removing a DIMM ........................................................ 2-18  
2.5  
Expansion slots.......................................................................... 2-19  
2.5.1  
2.5.2  
2.5.3  
2.5.4  
2.5.5  
2.5.6  
Installing an expansion card ......................................... 2-19  
Configuring an expansion card ..................................... 2-19  
Interrupt assignments ................................................... 2-20  
PCI slots........................................................................ 2-21  
PCI Express x1 slots..................................................... 2-21  
PCI Express x16 slots................................................... 2-21  
iii  
Contents  
2.6  
2.7  
Jumper ........................................................................................ 2-23  
Connectors ................................................................................. 2-24  
2.7.1  
2.7.2  
Rear panel connectors.................................................. 2-24  
Internal connectors ....................................................... 2-26  
Chapter 3: Powering up  
3.1  
Starting up for the first time........................................................ 3-1  
Turning off the computer............................................................. 3-2  
3.2  
3.2.1  
3.2.2  
Using the OS shut down function.................................... 3-2  
Using the dual function power switch.............................. 3-2  
Chapter 4: BIOS setup  
4.1  
Managing and updating your BIOS ............................................ 4-1  
4.1.1  
4.1.2  
4.1.3  
4.1.4  
ASUS Update utility ........................................................ 4-1  
ASUS EZ Flash 2 utility................................................... 4-4  
AFUDOS utility................................................................ 4-5  
ASUS CrashFree BIOS 3 utility ...................................... 4-7  
4.2  
BIOS setup program .................................................................... 4-8  
4.2.1  
4.2.2  
4.2.3  
4.2.4  
4.2.5  
4.2.6  
4.2.7  
4.2.8  
4.2.9  
BIOS menu screen.......................................................... 4-9  
Menu bar......................................................................... 4-9  
Navigation keys............................................................... 4-9  
Menu items ................................................................... 4-10  
Sub-menu items............................................................ 4-10  
Configuration fields ....................................................... 4-10  
Pop-up window ............................................................. 4-10  
Scroll bar....................................................................... 4-10  
General help ................................................................. 4-10  
4.3  
Main menu .................................................................................. 4-11  
4.3.1  
4.3.2  
4.3.3  
4.3.4  
4.3.5  
4.3.6  
System Time [xx:xx:xx] ..................................................4-11  
System Date [Day xx/xx/xxxx]........................................4-11  
Floppy Diskette A [1.44M, 3.5 in.] ..............................................4-11  
SATA 1-4 ....................................................................... 4-12  
SATA Configuration....................................................... 4-13  
System Information....................................................... 4-14  
4.4  
Advanced menu ......................................................................... 4-15  
4.4.1  
4.4.2  
JumperFree Configuration ............................................ 4-15  
USB Configuration ........................................................ 4-20  
iv  
Contents  
4.4.3  
4.4.4  
4.4.5  
4.4.6  
CPU Configuration........................................................ 4-22  
Chipset.......................................................................... 4-23  
OnBoard Devices Configuration ................................... 4-24  
PCIPnP ......................................................................... 4-25  
4.5  
Power menu................................................................................ 4-26  
4.5.1  
4.5.2  
4.5.3  
4.5.4  
4.5.5  
4.5.6  
Suspend Mode [Auto] ................................................... 4-26  
Repost Video on S3 Resume [Disabled]....................... 4-26  
ACPI Version [Disabled]................................................ 4-26  
ACPI APIC Support [Enabled]....................................... 4-26  
APM Configuration........................................................ 4-27  
Hardware Monitor ......................................................... 4-28  
4.6  
Boot menu .................................................................................. 4-30  
4.6.1  
4.6.2  
4.6.3  
Boot Device Priority ...................................................... 4-30  
Boot Settings Configuration .......................................... 4-31  
Security......................................................................... 4-32  
4.7  
4.8  
Tools menu ................................................................................. 4-34  
4.7.1  
4.7.2  
ASUS EZ Flash 2.......................................................... 4-34  
ASUS Ai Net 2............................................................... 4-35  
Exit menu.................................................................................... 4-36  
Chapter 5: Software support  
5.1  
5.2  
Installing an operating system ................................................... 5-1  
Support DVD information............................................................ 5-1  
5.2.1  
5.2.2  
5.2.3  
5.2.5  
5.2.6  
5.2.7  
Running the support DVD............................................... 5-1  
Drivers menu................................................................... 5-2  
Utilities menu .................................................................. 5-3  
Manual menu .................................................................. 5-5  
ASUS Contact information.............................................. 5-5  
Other information ............................................................ 5-6  
5.3  
Software information ................................................................... 5-8  
5.3.1  
5.3.2  
5.3.3  
5.3.4  
5.3.5  
5.3.6  
ASUS MyLogo3™........................................................... 5-8  
AI NET2 ........................................................................ 5-10  
ASUS PC Probe II..........................................................5-11  
ASUS AI Suite............................................................... 5-17  
ASUS EPU Utility—AI Gear 3+..................................... 5-19  
ASUS AI Nap ................................................................ 5-21  
v
Contents  
5.3.7  
5.3.8  
5.3.9  
ASUS Q-Fan 2.............................................................. 5-22  
ASUS AI Booster........................................................... 5-23  
ASUS AI Direct Link...................................................... 5-24  
Chapter 6: ATI® CrossFire™ technology support  
6.1  
Overview ....................................................................................... 6-1  
6.1.1  
6.1.2  
Requirements.................................................................. 6-1  
Before you begin............................................................. 6-1  
6.2  
6.3  
Installing CrossFire™ graphics cards ....................................... 6-2  
Software information ................................................................... 6-5  
6.3.1  
6.3.2  
Installing the device drivers............................................. 6-5  
Using the Catalyst™ Control Center............................... 6-7  
Appendix: CPU features  
A.1  
A.2  
Intel® EM64T..................................................................................A-1  
Enhanced Intel SpeedStep® Technology (EIST)........................A-1  
A.2.1  
A.2.2  
System requirements......................................................A-1  
Using the EIST................................................................A-2  
A.3  
Intel® Hyper-Threading Technology ...........................................A-3  
vi  
Notices  
Federal Communications Commission Statement  
This device complies with Part 15 of the FCC Rules. Operation is subject to the  
following two conditions:  
This device may not cause harmful interference, and  
This device must accept any interference received including interference that  
may cause undesired operation.  
This equipment has been tested and found to comply with the limits for a  
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are  
designed to provide reasonable protection against harmful interference in a  
residential installation. This equipment generates, uses and can radiate radio  
frequency energy and, if not installed and used in accordance with manufacturer’s  
instructions, may cause harmful interference to radio communications. However,  
there is no guarantee that interference will not occur in a particular installation. If  
this equipment does cause harmful interference to radio or television reception,  
which can be determined by turning the equipment off and on, the user is  
encouraged to try to correct the interference by one or more of the following  
measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment to an outlet on a circuit different from that to which the  
receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
The use of shielded cables for connection of the monitor to the graphics card is  
required to assure compliance with FCC regulations. Changes or modifications  
to this unit not expressly approved by the party responsible for compliance  
could void the user’s authority to operate this equipment.  
Canadian Department of Communications Statement  
This digital apparatus does not exceed the Class B limits for radio noise emissions  
from digital apparatus set out in the Radio Interference Regulations of the  
Canadian Department of Communications.  
This class B digital apparatus complies with Canadian ICES-003.  
vii  
Safety information  
Electrical safety  
To prevent electrical shock hazard, disconnect the power cable from the  
electrical outlet before relocating the system.  
When adding or removing devices to or from the system, ensure that the  
power cables for the devices are unplugged before the signal cables are  
connected. If possible, disconnect all power cables from the existing system  
before you add a device.  
Before connecting or removing signal cables from the motherboard, ensure  
that all power cables are unplugged.  
Seek professional assistance before using an 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.  
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.  
This symbol of the crossed out wheeled bin indicates that the product (electrical,  
electronic equipment and mercury-containing button cell battery) should not  
be placed in municipal waste. Check local regulations for disposal of electronic  
products.  
viii  
About this guide  
This user guide contains the information you need when installing and configuring  
the motherboard.  
How this guide is organized  
This guide contains the following parts:  
Chapter 1: Product introduction  
This chapter describes the features of the motherboard and the new  
technology it supports.  
Chapter 2: Hardware information  
This chapter lists the hardware setup procedures that you have to perform  
when installing system components. It includes description of the switches,  
jumpers, and connectors on the motherboard.  
Chapter 3: Powering up  
This chapter describes the power up sequence and ways of shutting down  
the system.  
Chapter 4: BIOS setup  
This chapter tells how to change system settings through the BIOS Setup  
menus. Detailed descriptions of the BIOS parameters are also provided.  
Chapter 5: Software support  
This chapter describes the contents of the support DVD that comes with the  
motherboard package and the software.  
Chapter 6: ATI CrossFire™ support  
This chapter describes the ATI CrossFire™ feature and shows the graphics  
card installation procedures.  
Appendix: CPU features  
The Appendix describes the CPU features and technologies that the  
motherboard supports.  
Where to find more information  
Refer to the following sources for additional information and for product and  
software updates.  
1.  
2.  
ASUS websites  
The ASUS website provides updated information on ASUS hardware and  
software products. Refer to the ASUS contact information.  
Optional documentation  
Your product package may include optional documentation, such as warranty  
flyers, that may have been added by your dealer. These documents are not  
part of the standard package.  
ix  
Conventions used in this guide  
To 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>  
Command  
Means that you must type the command exactly  
as shown, then supply the required item or value  
enclosed in brackets.  
Example: At the DOS prompt, type the command line:  
afudos /i[filename]  
afudos /iP5KEPU.ROM  
x
P5K/EPU specifications summary  
CPU  
LGA775 socket for Intel® Core™2 Quad /  
Core™2 Extreme / Core™2 Duo / Pentium® Extreme /  
Pentium® D / Pentium® 4 Processors  
Supports FSB 1600 / 1333 / 1066 / 800 MHz  
Compatible with Intel® 05B/05A/06 processors  
Intel® Hyper-Threading Technology ready  
* Refer to www.asus.com for Intel CPU support list  
Support Intel® next generation 45nm Multi-Core CPU  
Chipset  
Intel® P35 / ICH9 with Intel® Fast Memory Access  
Technology  
System Bus  
Memory  
1600/1333 / 1066 / 800 MHz  
4 x DIMM, max. 8GB, DDR2 1200 (O.C.)/1066 / 800 /  
667MHz, non-ECC, un-buffered memory  
Dual channel memory architecture  
Refer to www.asus.com or this user manual for the  
Memory QVL (Qualified Vendors Lists).  
2 x PCIe x16 (blue @ x16 mode, black @ x4 or x1  
mode)  
2 x PCIe x1  
2 x PCI 2.2  
Expansion Slots  
Storage  
Southbridge  
- 4 x SATA 3.0 Gb/s ports  
Marvell® 88SE6102 PATA controller  
- 1 x UltraDMA 133/100/66 for up to 2 PATA devices  
Marvell® 88E8056 PCIe Gigabit LAN controllers,  
featuring AI NET2  
LAN  
Realtek® ALC883 8-channel High Definition Audio  
Audio  
CODEC  
- Supports Enumeration, Multi-streaming technologies  
- Coaxial S/PDIF out port at back I/O  
(continued on the next page)  
xi  
P5K/EPU specifications summary  
VIA® VT6308P controller supports 2 x IEEE 1394a ports  
IEEE 1394  
(one at midboard; one at back panel)  
12 x USB 2.0 ports (6 ports at mid-board, 6 ports at back  
panel)  
USB  
ASUS AI Lifestyle  
Unique features  
ASUS Power Saving Solution:  
- ASUS EPU (Energy Process Unit)  
- ASUS AI Nap  
- ASUS Q Fan 2  
ASUS Crystal Sound:  
- ASUS Noise Filter  
ASUS EZ DIY:  
- ASUS AI Direct Link  
- ASUS Q-Connector  
- ASUS CrashFree BIOS 3  
- ASUS EZ Flash 2  
ASUS MyLogo3™  
ASUS Stylish Features  
ASUS Exclusive  
Intelligent overclocking tools:  
Overclocking Features  
- ASUS AI Booster utility  
Precision Tweaker 2:  
- vCore: Adjustable CPU voltage at 0.00625V increment  
- vDIMM: 64-step DRAM voltage control  
- vChipset (N.B.): 33-step Chipset voltage control  
- vFSB Termination: 15-step reference voltage control  
- vCPU PLL: 64-step CPU PLL voltage control  
SFS (Stepless Frequency Selection)  
- FSB tuning from 200MHz up to 800MHz at 1MHz  
increment  
- Memory tuning from 667MHz up to 1333MHz for DDR2  
- PCI Express frequency tuning from 100MHz up to  
150MHz at 1MHz increment  
Overclocking Protection:  
- ASUS C.P.R.(CPU Parameter Recall)  
(continued on the next page)  
xii  
P5K/EPU specifications summary  
1 x PS/2 Keyboard  
1 x PS/2 Mouse  
Back Panel I/O Ports  
1 x S/PDIF Out (Coaxial)  
1 x IEEE1394a  
1 x RJ45 port  
6 x USB 2.0/1.1  
8-channel Audio I/O  
Internal I/O Connectors  
3 x USB connectors support additional 6 USB ports  
1 x Floppy disk drive connector  
1 x COM connector  
1 x IDE connector  
4 x SATA connectors  
1 x CPU Fan connector  
2 x Chassis Fan connector  
1 x Power Fan connector  
1 x IEEE1394a connector  
Front panel audio connector  
1 x S/PDIF Out Header  
Chassis Intrusion connector  
CD audio in  
24-pin ATX Power connector  
1 x 4-pin ATX 12V Power connector  
System Panel (Q-Connector)  
8 Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM 2.0,  
SM BIOS 2.3, ACPI 2.0a, ASUS EZ Flash 2, ASUS  
CrashFree BIOS 3  
BIOS Features  
Manageability  
WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE  
Support DVD Contents  
Drivers  
ASUS PC Probe II  
ASUS Update  
ASUS AI Suite  
Anti-virus software (OEM version)  
ATX Form Factor, 12”x 8.6” (30.5cm x 21.8cm)  
Form Factor  
*Specifications are subject to change without notice.  
xiii  
xiv  
This chapter describes the motherboard  
features and the new technologies  
it supports.  
Product  
1
introduction  
Chapter summary  
1
1.1  
1.2  
1.3  
Welcome! ...................................................................................... 1-1  
Package contents......................................................................... 1-1  
Special features............................................................................ 1-2  
ASUS P5K/EPU  
1.1  
Welcome!  
Thank you for buying an ASUS® P5K/EPU motherboard!  
The motherboard delivers a host of new features and latest technologies, making it  
another standout in the long line of ASUS quality motherboards!  
Before you start installing the motherboard, and hardware devices on it, check the  
items in your package with the list below.  
1.2  
Package contents  
Check your motherboard package for the following items.  
Motherboard  
Cables  
ASUS P5K/EPU  
1 x 2-port Serial ATA power cable  
2 x Serial ATA signal cables  
1 x Ultra DMA 133/100/66 cable  
1 x Floppy disk drive cable  
Accessories  
ASUS Q-Shield (I/O Shield)  
1 x ASUS Q-Connector Kit (USB, 1394, system  
panel; Retail version only)  
Application DVD  
Documentation  
ASUS motherboard support DVD  
User guide  
If any of the above items is damaged or missing, contact your retailer.  
1-1  
ASUS P5K/EPU  
1.3  
Special features  
1.3.1  
Product highlights  
Intel® LGA775 Core™ 2 Processor Ready  
This motherboard supports the latest Intel® Core™2 and Core™2 Quad  
processors in LGA775 package. It also can support Intel® next generation 45nm  
Multi-Core CPU. With new Intel® Core™ microarchitecture technology and 1333  
/ 1066 / 800 MHz FSB, Intel® Core™2 processor is one of the most powerful and  
energy efficient CPU in the world.  
Intel® Core™2 Duo/ Intel® Core™2 Extreme CPU support  
This motherboard supports the latest Intel® Core™2 processor in the LGA775  
package. With the new Intel® Core™ microarchitecture technology and 1333 / 1066  
/ 800 MHz FSB, the Intel® Core™2 is one of the most powerful and energy efficient  
CPUs in the world.  
Intel P35 Chipset  
The Intel® P35 Express Chipset is the latest chipset designed to support 8GB of  
dual-channel DDR2 1066 / 800/ 667 architecture, 1333/1066/800 FSB (Front Side  
Bus), PCI Express x16 graphics and multi-core CPU. It especially includes Intel®  
Fast Memory Access technology that significantly optimizes the use of available  
memory bandwidth and reduces the latency of the memory accesses.  
Super Memspeed Technology  
To attain top performance, ASUS has managed to break through current FSB  
and DRAM ratio proportions by utilizing Super Memspeed Technology- the latest  
technology that provides even more precise overclocking options to unleash  
the true potential of DDR2 memory. Native DDR2 1066 maximizes system  
performance by eliminating the bottleneck when overclocking both the CPU and  
the memory- providing great performance for 3D graphics and other memory  
demanding applications. Refer to page 2-13 for details.  
Serial ATA 3 Gb/s technology  
This motherboard supports the next-generation hard drives based on the Serial  
ATA (SATA) 3Gb/s storage specification, delivering enhanced scalability and  
doubling the bus bandwidth for high-speed data retrieval and saves. See pages  
2-26 and 2-27 for details.  
1-2  
Chapter 1: Product Introduction  
IEEE 1394a support  
The IEEE 1394a interface provides high speed digital interface for audio/video  
appliances such as digital television, digital video camcorders, storage peripherals  
& other PC portable devices. See pages 2-23 and 2-28 for details.  
S/PDIF digital sound ready  
This motherboard provides convenient connectivity to external home theater audio  
systems via the coaxial S/PDIF-out (SONY-PHILIPS Digital Interface) jack.It allows  
to transfer digital audio without converting to analog format and keeps the best  
signal quality. See pages 2-24 and 2-32 for details.  
Gigabit LAN solution  
PCI Express Gb LAN controller delivers transfer speeds up to ten times faster than  
conventional 10/100/1000 Ethernet connections. Gigabit LAN is the networking  
standard for the early future and is ideal for handling large amounts of data such  
as video, audio, and voice. See page 2-23 for details.  
High Definition Audio  
Enjoy high-end sound quality on your PC! The onboard 8-channel HD audio (High  
Definition Audio, previously codenamed Azalia) CODEC enables high-quality  
192KHz/24-bit audio output that simultaneously sends different audio streams to  
different destinations. You can now talk to your partners on the headphone while  
playing multi-channel network games. See pages 2-23 and 2-24 for details.  
CrossFire Technology  
ATI's CrossFire boosts image quality along with rendering speed, eliminating the  
need to scale down screen resolutions to get the high image quality you want.  
CrossFire ignites with the higher antialiasing, anisotropic filtering, shading, and  
texture settings you desire. Adjust your display configurations, experiment with  
your advanced 3D settings, and check the effect with a real-time 3D-rendered  
preview within ATI's Catalyst™ Control Center to rule your CrossFire system.  
Green ASUS  
This motherboard and its packaging comply with the European Union’s Restriction  
on the use of Hazardous Substances (RoHS). This is in line with the ASUS vision  
of creating environment-friendly and recyclable products/packaging to safeguard  
consumers’ health while minimizing the impact on the environment.  
1-3  
ASUS P5K/EPU  
1.3.2  
ASUS AI Lifestyle unique features  
ASUS Quiet Thermal Solution  
ASUS Quiet Thermal solution makes system more stable and enhances the  
overclocking capability.  
ASUS EPU  
The ASUS EPU utilizes innovative technology to digitally monitor and  
tune the CPU power supply with improved VR responses in heavy or light  
loadings. It automatically provides power for higher performance or improve  
efficiency by 50% when the PC is running low intensity applications. Working  
+
together with AI Gear 3 , this can help you attain the best possible power  
efficiency and energy savings up to 80.23% to help save the environment.  
See page 5-19 for details.  
ASUS 3rd Generation 8-Phase Power Design  
Longer Life, & Higher Efficiency!  
With power efficiency so important to operating temperatures, ASUS' 3rd  
generation 8-phase VRM design leads the industry with its 96% power  
efficiency. High quality power components such as low RDS (on) MOSFETs  
for minimum switching loss & lower temperatures, Ferrite core chokes with  
lower hysteresis loss, and high quality Japanese-made conductive polymer  
capacitors all add up to ensure longer component life and lower power loss  
- creating more energy efficiency.  
AI Nap  
With AI Nap, the system can continue running at minimum power and noise  
when you are temporarily away. To wake the system and return to the OS  
environment, simply click the mouse or press a key. See page 5-21 for  
details.  
Q-Fan 2  
ASUS Q-Fan2 technology intelligently adjusts both CPU fan and chassis fan  
speeds according to system loading to ensure quiet, cool and efficient operation.  
See pages 4-29 and 5-22 for details.  
1-4  
Chapter 1: Product Introduction  
ASUS Crystal Sound  
This feature enhances the audio on speech-centric applications like Skype, online  
game, video conference and recording.  
Noise Filter  
This feature detects repetitive and stationary noises (non-voice signals) like  
computer fans, air conditioners, and other background noises then eliminates  
it in the incoming audio stream while recording. See page 5-29 for details.  
ASUS EZ DIY  
ASUS EZ DIY feature collection provides you easy ways to install computer  
components, update the BIOS or back up your favorite settings.  
ASUS Q-Shield  
The specially designed ASUS Q-Shield provides conductivity to best protect  
your motherboard against static electricity damage and shields it against  
Electronic Magnetic Interference (EMI). Without the usual "fingers" present,  
this new design is convenient and safe to install.  
ASUS Q-Connector  
ASUS Q-Connector allows you to easily connect or disconnect the chassis  
front panel cables to the motherboard. This unique module eliminates the  
trouble of connecting the system panel cables one at a time and avoiding  
wrong cable connections. See pages 2-28, 2-29 and 2-34 for details.  
ASUS CrashFree BIOS 3  
The ASUS CrashFree BIOS 3 allows users to restore corrupted BIOS data  
from a USB flash disk containing the BIOS file. See page 4-7 for details.  
ASUS EZ Flash 2  
EZ Flash 2 is a user-friendly BIOS update utility. Simply press the predefined  
hotkey to launch the utility and update the BIOS without entering the OS.  
Update your BIOS easily without preparing a bootable diskette or using an  
OS-based flash utility. See pages 4-4 and 4-35 for details.  
1-5  
ASUS P5K/EPU  
ASUS MyLogo3™  
This feature allows you to convert your favorite photo into a 256-color boot logo  
for a more colorful and vivid image on your screen. See pages 4-32 and 5-9 for  
details.  
1.3.3  
ASUS Intelligent Performance and Overclocking  
features  
AI Booster  
The ASUS AI Booster allows you to overclock the CPU speed in Windows  
environment without the hassle of booting the BIOS. See page 5-23 for details.  
Precision Tweaker 2  
Allows the user to adjust the NB Voltage, FSB termination Voltage, CPU PLL  
Voltage and the DRAM Voltage in 0.02v steps to finetune voltages to achieve the  
most precise setting for the ultimate customized overclocking configuration. See  
pages 4-19 and 4-20 for details.  
C.P.R. (CPU Parameter Recall)  
The C.P.R. feature of the motherboard BIOS allows automatic re-setting to the  
BIOS default settings in case the system hangs due to overclocking. When the  
system hangs due to overclocking, C.P.R. eliminates the need to open the system  
chassis and clear the RTC data. Simply shut down and reboot the system, and the  
BIOS automatically restores the CPU default setting for each parameter. See page  
2-22 for details.  
1-6  
Chapter 1: Product Introduction  
This chapter lists the hardware setup  
procedures that you have to perform  
when installing system components. It  
includes description of the jumpers and  
connectors on the motherboard.  
Hardware  
2
information  
Chapter summary  
2
2.1  
2.2  
2.3  
2.4  
2.5  
2.6  
2.7  
Before you proceed ..................................................................... 2-1  
Motherboard overview................................................................. 2-2  
Central Processing Unit (CPU) ................................................... 2-6  
System memory ......................................................................... 2-13  
Expansion slots.......................................................................... 2-18  
Jumper ........................................................................................ 2-22  
Connectors ................................................................................. 2-23  
ASUS P5K/EPU  
2.1  
Before you proceed  
Take note of the following precautions before you install motherboard components  
or change any motherboard settings.  
Unplug the power cord from the wall socket before touching any  
component.  
Use a grounded wrist strap or touch a safely grounded object or  
a metal object, such as the power supply case, before handling  
components 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, and/or components.  
Onboard LED  
The motherboard comes with a standby power LED. The green LED lights up  
to indicate that the system is ON, in sleep mode, or in soft-off mode. This is a  
reminder that you should shut down the system and unplug the power cable before  
removing or plugging in any motherboard component. The illustration below shows  
the location of the onboard LED.  
SB_PWR  
®
ON  
OFF  
Standby  
Power  
Powered  
Off  
P5K/EPU Onboard LED  
ASUS P5K/EPU  
2-1  
2.2  
Motherboard overview  
Before you install the motherboard, study the configuration of your chassis to  
ensure that the motherboard fits into it.  
Make sure to unplug the power cord before installing or removing the  
motherboard. Failure to do so can cause you physical injury and damage  
motherboard components.  
2.2.1  
Placement direction  
When installing the motherboard, make sure that you place it into the chassis in the  
correct orientation. The edge with external ports goes to the rear part of the chassis  
as indicated in the image below.  
2.2.2  
Screw holes  
Place six (6) screws into the holes indicated by circles to secure the motherboard  
to the chassis.  
DO NOT overtighten the screws! Doing so can damage the motherboard.  
Place this side towards  
the rear of the chassis  
®
2-2  
Chapter 2: Hardware information  
2.2.3  
Motherboard layout  
24.5cm (9.6in)  
KBMS  
ATX12V  
USB56  
EPU  
SPDIF_O1  
F_USB34  
LGA775  
LAN1_USB12  
AUDIO  
PWR_FAN  
®
CPU_FAN  
Intel  
P35  
CD  
AAFP  
CHA_FAN1  
DET_X16_1  
88E8056  
PCIEX16_1  
CR2032 3V  
DET_X1_1  
Lithium Cell  
CMOS Power  
PCIEX1_1  
CHA_FAN2  
DET_X1_2  
®
ICH9  
®
Intel  
PCIEX1_2  
CLRTC  
CHASSIS  
BIOS  
DET_X16_2  
PCIEX16_2  
PCI1  
SATA4  
SATA3  
SATA1  
DET_PCI1  
SATA2  
ALC883  
DET_PCI2  
PCI2  
SB_PWR  
SPDIF_OUT  
COM1  
FLOPPY  
IE1394_2  
USB1112  
USB910  
USB78  
PANEL  
Refer to 2.7 Connectors for more information about rear panel connectors and  
internal connectors.  
ASUS P5K/EPU  
2-3  
2.2.4  
Layout contents  
Slots  
Page  
2-13  
2-20  
2-20  
2-20  
1.  
2.  
3.  
4.  
DDR2 DIMM slots  
PCI slots  
PCI Express x 1 slots  
PCI Express x16 slots  
Jumper  
Page  
1.  
Clear RTC RAM (3-pin CLRTC)  
2-22  
Rear panel connectors  
Page  
2-23  
2-23  
2-23  
2-23  
2-23  
2-23  
2-23  
2-24  
2-24  
2-24  
2-24  
2-24  
2-24  
2-24  
1.  
PS/2 mouse port (green)  
2.  
IEEE 1394a port  
3.  
LAN (RJ-45) port  
4.  
Center/Subwoofer port (orange)  
Rear Speaker Out port (black)  
Line In port (light blue)  
Line Out port (lime)  
5.  
6.  
7.  
8.  
Microphone port (pink)  
Side Speaker Out port (gray)  
USB 2.0 ports 1 and 2  
USB 2.0 ports 3 and 4  
Coaxial S/PDIF Out port  
USB 2.0 ports 5 and 6  
PS/2 keyboard port (purple)  
9.  
10.  
11.  
12.  
13.  
14.  
2-4  
Chapter 2: Hardware information  
Internal connectors  
Page  
2-25  
2-25  
2-26  
1.  
2.  
3.  
Floppy disk drive connector (34-1 pin FLOPPY)  
IDE connector (40-1 pin PRI_EIDE))  
ICH9 Serial ATA connectors (7-pin SATA1 [red], SATA2 [red],  
SATA3 [red], SATA4 [red])  
4.  
5.  
6.  
USB connectors (10-1 pin USB78, USB910, USB1112)  
IEEE 1394a port connector (10-1 pin IE1394_2)  
2-28  
2-28  
2-29  
CPU, chassis and power fan connectors  
(4-pin CPU_FAN, 3-pin CHA_FAN1-2, 3-pin PWR_FAN)  
7.  
Chassis intrusion connector (4-1 pin CHASSIS)  
ATX power connectors (24-pin EATXPWR, 4-pin EATX12V)  
Front panel audio connector (10-1 pin AAFP)  
Optical drive audio connector (4-pin CD)  
2-30  
2-30  
2-31  
2-32  
2-32  
8.  
9.  
10.  
11.  
Digital audio connector (4-1 pin SPDIF_OUT, for ASUS HDMI  
card)  
12.  
System panel connector (20-8 pin PANEL)  
2-33  
2-34  
Q-Connector (system panel)  
ASUS P5K/EPU  
2-5  
2.3  
Central Processing Unit (CPU)  
The motherboard comes with a surface mount LGA775 socket designed for the  
Intel® Core™2 Quad /Core™2 Extreme / Core™2 Duo / Pentium® Extreme /  
Pentium® D / Pentium® 4 Processors  
Make sure that all power cables are unplugged before installing the CPU.  
If installing a dual-core CPU, connect the chassis fan cable to the  
CHA_FAN1 connector to ensure system stability.  
Due to the chipset limitation, we recommend you use FSB 800MHz CPU or  
above.  
Upon purchase of the motherboard, make sure 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 LGA775 socket.  
The product warranty does not cover damage to the socket contacts  
resulting from incorrect CPU installation/removal, or misplacement/loss/  
incorrect removal of the PnP cap.  
2-6  
Chapter 2: Hardware information  
2.3.1  
Installing the CPU  
To install a CPU:  
1.  
Locate the CPU socket on the motherboard.  
®
P5K/EPU CPU Socket 775  
Before installing the CPU, make sure that the cam box is facing towards you  
and the load lever is on your left.  
2.  
Press the load lever with your thumb (A), then move it to the left (B) until it is  
released from the retention tab.  
Retention tab  
A
PnP cap  
Load lever  
B
This side of the socket box  
should face you.  
To prevent damage to the socket pins, do not remove the PnP cap unless you  
are installing a CPU.  
3.  
Lift the load lever in the direction of  
the arrow to a 135º angle.  
ASUS P5K/EPU  
2-7  
4.  
Lift the load plate with your thumb  
and forefinger to a 100º angle (A),  
then push the PnP cap from the load  
plate window to remove (B).  
B
A
Load plate  
Alignment key  
5.  
Position the CPU over the  
socket, making sure that  
the gold triangle is on the  
bottom-left corner of the  
socket then fit the socket  
alignment key into the  
CPU notch.  
CPU notch  
Gold triangle mark  
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!  
A
6.  
7.  
Close the load plate (A), then  
push the load lever (B) until it  
snaps into the retention tab.  
If installing a dual-core CPU,  
B
connect the chassis fan cable  
to the CHA_FAN1 connector to  
ensure system stability.  
The motherboard supports Intel® LGA775 processors with the Intel® Enhanced  
Memory 64 Technology (EM64T), Enhanced Intel SpeedStep® Technology  
(EIST), and Hyper-Threading Technology. Refer to the Appendix for more  
information on these CPU features.  
2-8  
Chapter 2: Hardware information  
2.3.2  
Installing the CPU heatsink and fan  
The Intel® LGA775 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, make sure that you  
use only Intel®-certified multi-directional heatsink and fan.  
Your Intel® LGA775 heatsink and fan assembly comes in a push-pin design  
and requires no tool to install.  
If you purchased a separate CPU heatsink and fan assembly, make sure  
that you have properly applied Thermal Interface Material to the CPU  
heatsink or CPU before you install the heatsink and fan assembly.  
Make sure 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.  
Orient the heatsink and fan  
assembly such that the CPU fan  
cable is closest to the CPU fan  
connector.  
Motherboard hole  
Fastener  
Narrow end  
of the  
groove  
Make sure to orient each fastener with the narrow end of the groove pointing  
outward. (The photo shows the groove shaded for emphasis.)  
ASUS P5K/EPU  
2-9  
2.  
Push down two fasteners at a time in  
a diagonal sequence to secure the  
heatsink and fan assembly in place.  
B
B
A
A
A
B
B
A
3.  
Connect the CPU fan cable to the connector on the motherboard labeled  
CPU_FAN.  
CPU_FAN  
GND  
CPU FAN PWR  
CPU FAN IN  
CPU FAN PWM  
®
P5K/EPU CPU fan connector  
DO NOT forget to connect the CPU fan connector! Hardware monitoring errors  
can occur if you fail to plug this connector.  
2-10  
Chapter 2: Hardware information  
2.3.3  
Uninstalling the CPU heatsink and fan  
To uninstall the CPU heatsink and fan:  
1.  
2.  
Disconnect the CPU fan cable from  
the connector on the motherboard.  
Rotate each fastener  
counterclockwise.  
3.  
Pull up two fasteners at a time in  
a diagonal sequence to disengage  
the heatsink and fan assembly from  
the motherboard.  
B
B
A
A
A
B
B
A
4.  
Carefully remove the heatsink  
and fan assembly from the  
motherboard.  
ASUS P5K/EPU  
2-11  
5.  
Rotate each fastener clockwise to  
ensure correct orientation when  
reinstalling.  
Narrow end of the groove  
The narrow end of the  
groove should point outward  
after resetting. (The photo  
shows the groove shaded for  
emphasis.)  
Refer to the documentation in the boxed or stand-alone CPU fan package for  
detailed information on CPU fan installation.  
2-12  
Chapter 2: Hardware information  
2.4  
System memory  
2.4.1  
Overview  
The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline Memory  
Modules (DIMM) sockets.  
A DDR2 module has the same physical dimensions as a DDR DIMM but has a  
240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched  
differently to prevent installation on a DDR DIMM socket.  
The figure illustrates the location of the DDR2 DIMM sockets:  
®
P5K/EPU 240-pin DDR2 DIMM sockets  
Channel  
Sockets  
Channel A  
Channel B  
DIMM_A1 and DIMM_A2  
DIMM_B1 and DIMM_B2  
This chipset officially supports DDR2-800 MHz. With the ASUS Super  
Memspeed Technology, this motherboard natively supports up to  
DDR2-1066 MHz and provides more ratio setting items than the chipset  
officially supports. See the table below.  
FSB  
1333  
1333  
1333  
1066  
1066  
1066  
DDR2  
1066*  
800  
667  
1066*  
800  
667  
*If you install a DDR2-1066 memory module, make sure that you set the  
DRAM Frequency item in BIOS to [DDR2-1066MHz]. See section 4.4.1  
Jumperfree Configuration for details.  
ASUS P5K/EPU  
2-13  
2.4.2  
Memory configurations  
You may install 512 MB, 1 GB, and 2 GB unbuffered non-ECC DDR2 DIMMs into  
the DIMM sockets.  
Sockets  
Mode  
DIMM_A1  
-
DIMM_B1  
Populated  
DIMM_A2  
DIMM_B2  
-
Single-Channel  
Populated  
Populated  
Populated  
-
-
-
Dual-channel (1)  
Dual-channel (2)  
Populated  
Populated  
-
-
Populated  
Populated  
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.  
Always install DIMMs with the same CAS latency. For optimum  
compatibility, it is recommended that you obtain memory modules from the  
same vendor.  
Due to chipset resource allocation, the system may detect less than 8 GB  
system memory when you installed four 2 GB DDR2 memory modules.  
If you install four 1 GB memory modules, the system may detect less than  
3 GB of total memory because of address space allocation for other critical  
functions. This limitation applies to Windows Vista 32-bit/Windows XP 32-bit  
version operating system since it does not support PAE (Physical Address  
Extention) mode.  
If you install Windows Vista 32-bit/Windows XP 32-bit version operating  
system, we recommend that you install less than 3GB of total memory.  
Notes on memory limitations  
Due to chipset limitation, this motherboard can only support up to  
8 GB on the operating systems listed below. You may install a maximum of  
2 GB DIMMs on each slot.  
64-bit  
Windows XP Professional x64 Edition  
Windows Vista x64 Edition  
2-14  
Chapter 2: Hardware information  
P5K/EPU Motherboard Qualified Vendors Lists (QVL)  
DDR2-1200MHz(O.C.) capability  
Size  
Vendor  
Chip No.  
CL  
Chip Brand SS/DS Part No.  
DIMM support  
A*  
V
B*  
C*  
512MB Kingston  
1024MB Kingston  
Heat-Sink Package  
Heat-Sink Package  
N/A N/A  
N/A N/A  
SS  
DS  
KHX9600D2/512  
KHX9600D2/1G  
V
P5K/EPU Motherboard Qualified Vendors Lists (QVL)  
DDR2-1066MHz capability  
Size  
Vendor  
Chip No.  
CL  
Chip Brand SS/DS Part No.  
DIMM support  
A*  
V
B*  
V
C*  
V
512MB  
KINGSTON Heat-Sink Package N/A  
N/A  
SS  
DS  
SS  
KHX8500D2/512  
1024MB CORSAIR  
512MB KINGMAX  
Heat-Sink Package  
5
N/A  
CM2X1024-8500C5  
V
V
KKA8FEIBF-HJK-  
18E  
N/A  
KINGMAX  
KLEC28F-A8KI5-  
EGAS  
V
V
V
1024MB KINGMAX  
KKA8FEIBF-HJK-  
18A  
N/A  
KINGMAX  
DS  
KLED48F-A8KI5-EPA  
V
V
P5K/EPU Motherboard Qualified Vendors Lists (QVL)  
DDR2-800MHz capability  
Size  
Vendor  
Chip No.  
CL  
Chip Brand SS/ Part No.  
DS  
DIMM  
support  
A* B* C*  
512MB  
KINGSTON K4T51083QC  
5
SEC  
SS KVR800D2N5/512  
DS KHX6400D2LL/1G  
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
1024MB KINGSTON Heat-Sink Package  
1024MB KINGSTON Heat-Sink Package  
1024MB KINGSTON V59C1512804QBF25  
1024MB KINGSTON Heat-Sink Package  
2048MB KINGSTON Heat-Sink Package  
4-4-4-12 N/A  
4-4-4-12 N/A  
SS KHX6400D2LLK2/1GN  
DS KVR800D2N5/1G  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
SS KHX6400D2ULK2/1G  
DS KHX6400D2ULK2/2G  
N/A  
512MB  
Qimonda  
HYB18T512800BF25F  
5-5-5  
SS HYS64T64000HU-  
25F-B  
1024MB Qimonda  
HYB18T512800BF25F  
5-5-5  
N/A  
DS HYS64T128020HU-  
25F-B  
V
V
512MB  
Hynix  
HY5PS12821CFP-S5  
HY5PS12821CFP-S5  
D9GKX  
5-5-5  
5-5-5  
N/A  
Hynix  
Hynix  
N/A  
SS HYMP564U64CP8-S5  
DS HYMP512U64CP8-S5  
V
V
V
V
V
V
V
V
1024MB Hynix  
512MB  
MICRON  
SS MT8HTF6464AY-  
80ED4  
1024MB MICRON  
D9GKX  
N/A  
N/A  
DS MT16HTF12864AY-  
80ED4  
V
V
V
V
512MB  
CORSAIR  
Heat-Sink Package  
Heat-Sink Package  
E1108AB-8E-E(ECC)  
E1108AB-8E-E(ECC)  
5
4
5
5
N/A  
SS CM2X512A-6400  
1024MB CORSAIR  
1024MB ELPIDA  
2048MB ELPIDA  
N/A  
DS CM2X1024-6400C4  
SS EBE10EE8ABFA-8E-E  
DS EBE21EE8ABFA-8E-E  
ELPIDA  
ELPIDA  
ASUS P5K/EPU  
2-15  
P5K/EPU Motherboard Qualified Vendors Lists (QVL)  
DDR2-800MHz capability  
Size  
Vendor  
Chip No.  
CL  
Chip Brand SS/ Part No.  
DS  
DIMM  
support  
A* B* C*  
512MB  
512MB  
Crucial  
Crucial  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
AD29608A8A-25EG  
AD26908A8A-25EG  
KKA8FEIBF-HJK-25A  
KKA8FEIBF-HJK-25A  
HY5PS12821CFP-S5  
HY5PS12821CFP-S5  
Heat-Sink Package  
4
N/A  
SS BL6464AA804.8FD  
V
V
V
4
N/A  
SS BL6464AA804.8FD3  
DS BL12864AA804.16FD  
DS BL12864AL804.16FD3  
DS BL12864AA804.16FD3  
DS AHU512E800C5K1C  
DS AHU01GE800C5K1C  
SS M2OAD6G3H3160G1E53  
DS M2OAD6G3I4170I1E58  
SS KLDC28F-A8KI5  
1024MB Crucial  
1024MB Crucial  
1024MB Crucial  
4
N/A  
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
4
N/A  
4
N/A  
512MB  
1024MB Apacer  
512MB A-DATA  
1024MB A-DATA  
512MB KINGMAX  
1024MB KINGMAX  
512MB Transcend  
1024MB Transcend  
Apacer  
5
N/A  
V
V
V
V
V
5
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
KINGMAX  
KINGMAX  
Hynix  
Hynix  
N/A  
DS KLDD48F-ABKI5  
SS TS64MLQ64V8J  
DS TS128MLQ64V8J  
SS T800UA12C4  
512MB  
Super  
Talent  
1024MB Super  
Talent  
Heat-Sink Package  
N/A  
N/A  
DS T800UB1GC4  
512MB  
NANYA  
NT5TU64M8BE-25C  
NT5TU64M8BE-25C  
NT5TU64M8CE-25D  
A3R12E3HEF641B9A05  
A3R12E3HEF641B9A05  
E2508AB-GE-E  
5
NANYA  
NANYA  
NANYA  
PSC  
SS NT512T64U880BY-25C  
DS NT1GT64U8HB0BY-25C  
DS NT1GT64U8HCOBY-25D  
SS AL6E8E63B8E1K  
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
1024MB NANYA  
1024MB NANYA  
5
N/A  
5
512MB  
PSC  
1024MB PSC  
5
PSC  
DS AL7E8E63B-8E1K  
256MB  
TwinMOS  
5
ELPIDA  
Elixir  
SS 8G-24IK2-EBT  
1024MB Elixir  
N2TU51280BE-25C  
N/A  
DS M2Y1G64TU8HB0B-25C  
2-16  
Chapter 2: Hardware information  
P5K/EPU Motherboard Qualified Vendors Lists (QVL)  
DDR2-667MHz capability  
Size  
Vendor  
Chip No.  
CL  
Chip Brand SS/ Part No.  
DS  
DIMM  
support  
A* B* C*  
512MB  
256MB  
256MB  
512MB  
KINGSTON D6408TEBGGL3U  
KINGSTON HYB18T256800AF3S  
KINGSTON 6SBI2D9DCG  
5
5
5
KINGSTON SS KVR667D2N5/512  
V
V
V
V
V
V
V
V
V
N/A  
SS KVR667D2N5/256  
MICRON  
SS KVR667D2N5/256  
Qimonda  
HYB18T512800BF3S(ECC) 5-5-5 N/A  
HYB18T512800BF3S(ECC) 5-5-5 N/A  
SS HYS72T64000HU-3S-B  
DS HYS72T128020HU-3S-B  
SS HYS64T64000HU-3S-B  
DS HYS64T128020HU-3S-B  
1024MB Qimonda  
512MB Qimonda  
1024MB Qimonda  
HYB18T512800BF3S  
HYB18T512800BF3S  
5
N/A  
N/A  
V
V
V
V
V
V
5
512MB  
256MB  
SAMSUNG K4T51163QE-ZCE6  
SAMSUNG K4T51083QE  
5
SAMSUNG DS M378T3354EZ3-CE6  
SAMSUNG SS M378T6553EZS-CE6  
SAMSUNG DS M378T2953EZ3-CE6  
5
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
1024MB SAMSUNG K4T51083QE  
5
256MB  
Hynix  
HY5PS121621CFP-Y5  
HY5PS12821CFP-Y5  
MIII00605  
5
Hynix  
Hynix  
N/A  
SS HYMP532U64CP6-Y5  
DS HYMP512U64CP8-Y5  
SS VS256MB667D2  
1024MB Hynix  
5
256MB  
512MB  
CORSAIR  
CORSAIR  
N/A  
N/A  
N/A  
5
V
V
64M8CFEG  
N/A  
SS VS512MB667D2  
1024MB CORSAIR  
64M8CFEG  
N/A  
DS VS1GB667D2  
256MB  
512MB  
512MB  
ELPIDA  
ELPIDA  
A-DATA  
E2508AB-6E-E  
ELPIDA  
ELPIDA  
A-DATA  
A-DATA  
N/A  
SS EBE25UC8ABFA-6E-E  
SS EBE51UD8AEFA-6E-E  
SS M2OAD5G3H3166I1C52  
DS M2OAD5G3I4176I1C52  
DS BL12864AA663.16FD  
DS BL12864AL664.16FD  
DS BL12864AA663.16FD2  
SS AU512E667C5KBGC  
DS AU01GE667C5KBGC  
V
V
E5108AE-6E-E  
5
AD29608A8A-3EG  
AD29608A8A-3EG  
Heat-Sink Package  
Heat-Sink Package  
Heat-Sink Package  
AM4B5708GQJS7E0628F  
AM4B5708GQJS7E  
K4T51083QE  
5
V
V
V
V
V
V
V
V
1024MB A-DATA  
1024MB crucial  
1024MB crucial  
1024MB crucial  
5
3
3
N/A  
3
N/A  
512MB  
Apacer  
5
APACER  
APACER  
V
V
V
V
V
V
V
V
V
V
1024MB Apacer  
5
512MB  
Transcend  
N/A  
N/A  
5
SAMSUNG SS TS64MLQ64V6J  
SAMSUNG DS TS128MLQ64V6J  
1024MB Transcend  
K4T51083QE  
V
V
V
V
V
256MB  
512MB  
Kingmax  
Kingmax  
N2TU51216AG-3C  
KKEA88B4LAUG-29DX  
KKEA88B4LAUG-29DX  
Heat-Sink Package  
NANYA  
KINGMAX  
KINGMAX  
N/A  
SS KLCB68F-36KH5  
SS KLCC28F-A8KB5  
DS KLCD48F-A8KB5  
SS T6UA512C5  
5
V
V
1024MB Kingmax  
5
512MB  
Super  
Talent  
5
1024MB Super  
Talent  
Heat-Sink Package  
5
N/A  
DS T6UB1GC5  
V
V
512MB  
512MB  
NANYA  
PSC  
NT5TU64M8BE-3C  
A3R12E3GEF637BLC5N  
A3R12E3GEF637BLC5N  
E5108AE-GE-E  
5
5
5
5
5
NANYA  
PSC  
SS NT512T64U88B0BY-3C  
SS AL6E8E63B-6E1K  
DS AL7E8E63B-6E1K  
SS 8G-25JK5-EBT  
V
V
V
V
V
V
V
V
1024MB PSC  
PSC  
512MB  
512MB  
TwinMOS  
TwinMOS  
ELPIDA  
TwinMOS  
TMM6208G8M30C  
SS 8D-23JK5M2ETP  
V
V
V
SS - Single-sided / DS - Double-sided  
DIMM support:  
A*: Supports one module inserted in any slot as Single-channel  
memory configuration.  
B*: Supports one pair of modules inserted into either the yellow slots  
or the black slots as one pair of Dual-channel memory configuration.  
C*: Supports four modules inserted into both the yellow and black slots  
as two pairs of Dual-channel memory configuration.  
Visit the ASUS website for the latest DDR2-1066/800/667 MHz QVL.  
ASUS P5K/EPU  
2-17  
2.4.3  
Installing a DIMM  
Unplug the power supply before adding or removing DIMMs or other  
system components. Failure to do so can cause severe damage to both the  
motherboard and the components.  
2
To install a DIMM:  
DDR2 DIMM notch  
3
1.  
2.  
Unlock a DIMM socket by pressing  
the retaining clips outward.  
Align a DIMM on the socket  
such that the notch on the DIMM  
matches the break on the socket.  
1
1
3.  
Firmly insert the DIMM into the  
socket until the retaining clips  
snap back in place and the DIMM  
is properly seated.  
Unlocked retaining clip  
A DDR2 DIMM is keyed with a notch so that it fits in only one direction. DO  
NOT force a DIMM into a socket to avoid damaging the DIMM.  
The DDR2 DIMM sockets do not support DDR DIMMs. DO NOT install  
DDR DIMMs to the DDR2 DIMM sockets.  
2.4.4  
Removing a DIMM  
To remove a DIMM:  
2
1. Simultaneously press the retaining  
clips outward to unlock the DIMM.  
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
DDR2 DIMM notch  
1
2.  
Remove the DIMM from the socket.  
2-18  
Chapter 2: Hardware information  
2.5  
Expansion slots  
In the future, you may need to install expansion cards. The following sub-sections  
describe the slots and the expansion cards that they support.  
Make sure to unplug the power cord before adding or removing expansion  
cards. Failure to do so may cause you physical injury and damage motherboard  
components.  
2.5.1  
Installing an expansion card  
To install an expansion card:  
1.  
2.  
3.  
4.  
Before installing the expansion card, read the documentation that came with  
it and make the necessary hardware settings for the card.  
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.  
Align the card connector with the slot and press firmly until the card is  
completely seated on the slot.  
5.  
6.  
Secure the card to the chassis with the screw you removed earlier.  
Replace the system cover.  
2.5.2  
Configuring an expansion card  
After installing the expansion card, configure it by adjusting the software settings.  
1.  
Turn on the system and change the necessary BIOS settings, if any. See  
Chapter 4 for information on BIOS setup.  
2.  
3.  
Assign an IRQ to the card. Refer to the tables on the next page.  
Install the software drivers for the expansion card.  
When using PCI cards on shared slots, ensure that the drivers support “Share  
IRQ” or that the cards do not need IRQ assignments. Otherwise, conflicts will  
arise between the two PCI groups, making the system unstable and the card  
inoperable. Refer to the table on the next page for details.  
ASUS P5K/EPU  
2-19  
2.5.3  
Interrupt assignments  
IRQ  
Priority  
Standard function  
0
1
1
2
System Timer  
Keyboard Controller  
2
9
Re-direct to IRQ#9  
3
IRQ holder for PCI steering*  
Communications Port (COM1)*  
IRQ holder for PCI steering*  
Floppy Disk Controller  
4
12  
13  
14  
15  
3
5
6
7
Printer Port (LPT1)*  
8
System CMOS/Real Time Clock  
IRQ holder for PCI steering*  
IRQ holder for PCI steering*  
IRQ holder for PCI steering*  
PS/2 Compatible Mouse Port*  
Numeric Data Processor  
Primary IDE Channel  
9
4
10  
11  
12  
13  
14  
15  
5
6
7
8
10  
11  
Secondary IDE Channel  
* These IRQs are usually available for PCI devices.  
IRQ assignments for this motherboard  
A
B
shared  
C
D
E
F
G
H
PCI slot 1  
PCI slot 2  
shared  
LAN(8056)  
shared  
shared  
shared  
PCIE x16 1  
PCIE x16 2  
PCIE x1 1  
shared  
PCIE x1 2  
shared  
USB controller 1  
USB controller 2  
USB controller 3  
USB controller 4  
USB controller 5  
USB controller 6  
USB 2.0 controller 1  
USB 2.0 controller 2  
SATA controller 1  
SATA controller 2  
used  
shared  
shared  
shared  
shared  
shared  
used  
shared  
shared  
shared  
used  
2-20  
Chapter 2: Hardware information  
2.5.4  
PCI slots  
The PCI slots support cards such as  
a LAN card, SCSI card, USB card,  
and other cards that comply with PCI  
specifications. The figure shows a LAN  
card installed on a PCI slot.  
2.5.5  
PCI Express x1 slots  
This motherboard supports PCI Express  
x1 network cards, SCSI cards and other  
cards that comply with the PCI Express  
specifications. The following figure  
shows a network card installed on the  
PCI Express x1 slot.  
2.5.6  
PCI Express x16 slots  
This motherboard has two PCI Express  
x16 slots that support PCI Express x16  
graphic cards complying with the PCI  
Express specifications. With two graphics  
cards installed, the motherboard can  
enable dual-display.  
This motherboard supports two ATI  
CrossFire™ PCI Express x16 graphics  
cards that comply with the PCI Express  
specifications.  
We recommend that you install a VGA card on the primary (blue) PCI Express  
slot, and install any other PCI Express device on the Universal PCI Express slot  
(black).  
ASUS P5K/EPU  
2-21  
Primary PCI Express x16 slot  
The primary PCI Express x16 slot supports PCI Express x16 graphic cards that  
comply with the PCI Express specifications.  
Universal PCI Express slot (max. x4 mode)  
This motherboard also supports a Universal PCI Express slot with a maximum  
speed of 2 GB/s. The operating frequency of this slot changes, depending on the  
type of PCI Express card you install. Refer to the table below for details.  
The figure shows two graphics cards installed on the primary PCI Express x16 slot  
and the Universal PCI Express slot.  
If you install two VGA cards, we recommend that you plug the rear chassis  
fan cable to the motherboard connector labeled CHA_FAN1 for better thermal  
environment. See page 2-30 for the connector location.  
Options for Universal PCI Express operating speed  
PCI Express slot  
Auto  
Automatically optimizes performance and  
functionality according to devices installed  
x4 mode [fast]  
x1 mode [compatible]  
User gets the best performance but this mode  
disables the PCI Express x1 slot  
Always runs at PCI Express x1 speed  
Some PCI Express graphics cards cannot operate on x4/x1 mode. We  
suggest that you install these cards on the primary PCI Express slot (blue)  
to increase system stability.  
Some PCI Express devices cannot operate on x4/x1 mode.  
2-22  
Chapter 2: Hardware information  
2.6  
Jumper  
1.  
Clear RTC RAM (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. Remove the onboard battery.  
3. 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.  
4. Reinstall the battery.  
5. Plug the power cord and turn ON the computer.  
6. 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!  
CLRTC  
1
2
2
3
®
Normal  
Clear RTC  
(Default)  
P5K/EPU Clear RTC RAM  
You do not need to clear the RTC when the system hangs due to  
overclocking. For system failure due to overclocking, use the C.P.R. (CPU  
Parameter Recall) feature. Shut down and reboot the system so the BIOS  
can automatically reset parameter settings to default values.  
Due to the chipset behavior, AC power off is required to enable C.P.R.  
function. You must turn off and on the power supply or unplug and plug the  
power cord before reboot the system.  
ASUS P5K/EPU  
2-23  
2.7  
Connectors  
2.7.1  
Rear panel connectors  
7
1
2
3
4
5
6
13  
12  
11  
10  
9
8
14  
1.  
2.  
PS/2 mouse port (green). This port is for a PS/2 mouse.  
IEEE 1394a port. This 6-pin IEEE 1394a port provides high-speed  
connectivity for audio/video devices, storage peripherals, PCs, or portable  
devices.  
3.  
4.  
LAN (RJ-45) port. This port allows Gigabit connection to a Local Area  
Network (LAN) through a network hub. Refer to the table below for the LAN  
port LED indications.  
Center/Subwoofer port (orange). This port connects the center/subwoofer  
speakers.  
LAN port LED indications  
ACT/LINK SPEED  
LED LED  
Activity/Link Speed LED  
Status  
Description  
No link  
Status  
OFF  
Description  
OFF  
10 Mbps connection  
100 Mbps connection  
1 Gbps connection  
ORANGE  
BLINKING  
Linked  
ORANGE  
GREEN  
Data activity  
LAN port  
5.  
6.  
Rear Speaker Out port (black). This port connects the rear speakers in a  
4-channel, 6-channel, or 8-channel audio configuration.  
Line In port (light blue). This port connects the tape, CD, CD player, or other  
audio sources.  
7.  
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.  
2-24  
Chapter 2: Hardware information  
8.  
9.  
Microphone port (pink). This port connects a microphone.  
Side Speaker Out port (gray). This port connects the side speakers in an  
8-channel audio configuration.  
Refer to the audio configuration table below for the function of the audio ports in  
2, 4, 6, or 8-channel configuration.  
Audio 2, 4, 6, or 8-channel configuration  
Port  
Headset  
2-channel  
4-channel  
6-channel  
8-channel  
Line In  
Light Blue  
Lime  
Line In  
Line In  
Line In  
Front Speaker Out  
Mic In  
Line Out  
Front Speaker Out  
Front Speaker Out  
Mic In  
Pink  
Mic In  
Mic In  
Orange  
Black  
Center/Subwoofer  
Rear Speaker Out  
Center/Subwoofer  
Rear Speaker Out  
Side Speaker Out  
Rear Speaker Out  
Gray  
10. USB 2.0 ports 1 and 2. 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. Coaxial S/PDIF Out port. This port connects an external audio output device  
via a coaxial S/PDIF cable.  
13. USB 2.0 ports 5 and 6. These 4-pin Universal Serial Bus (USB) ports are  
available for connecting USB 2.0 devices.  
14. PS/2 keyboard port (purple). This port is for a PS/2 keyboard.  
2-25  
ASUS P5K/EPU  
2.7.2  
Internal connectors  
1.  
Floppy disk drive connector (34-1 pin FLOPPY)  
This connector is for the provided floppy disk drive (FDD) signal cable. Insert  
one end of the cable to this connector, then connect the other end to the  
signal connector at the back of the floppy disk drive.  
Pin 5 on the connector is removed to prevent incorrect cable connection when  
using a FDD cable with a covered Pin 5.  
FLOPPY  
®
PIN 1  
NOTE: Orient the red markings on  
the floppy ribbon cable to PIN 1.  
P5K/EPU Floppy disk drive connector  
2.  
IDE connector (40-1 pin PRI_E IDE)  
The onboard IDE connector is for the Ultra DMA 133/100/66 signal cable.  
There are three connectors on each Ultra DMA 133/100/66 signal cable:  
blue, black, and gray. Connect the blue connector to the motherboard’s IDE  
connector, then select one of the following modes to configure your device.  
PRI_EIDE  
NOTE: Orient the red markings  
(usually zigzag) on the IDE  
ribbon cable to PIN 1.  
®
P5K/EPU IDE connector  
Drive jumper setting  
Mode of  
Cable connector  
device(s)  
Single device  
Two devices  
Cable-Select or Master  
Cable-Select  
-
Black  
Black  
Master  
Slave  
Master  
Slave  
Gray  
Master  
Slave  
Black or gray  
2-26  
Chapter 2: Hardware information  
Pin 20 on the IDE connector is removed to match the covered hole on the  
Ultra DMA cable connector. This prevents incorrect insertion when you  
connect the IDE cable.  
Use the 80-conductor IDE cable for Ultra DMA 133/100/66 IDE devices.  
If any device jumper is set as “Cable-Select,” make sure all other device  
jumpers have the same setting.  
3.  
ICH9 Serial ATA connectors (7-pin SATA1 [red], SATA2 [red], SATA3  
[red], SATA4 [red])  
These connectors are for the Serial ATA signal cables for Serial ATA hard disk  
drives.  
SATA4  
SATA3  
SATA1  
SATA2  
®
P5K/EPU SATA connectors  
right angle side  
Connect the right-angle side  
of SATA signal cable to SATA  
device. Or you may connect the  
right-angle side of SATA cable to  
the onboard SATA port to avoid  
mechanical conflict with huge  
graphics cards.  
2-27  
ASUS P5K/EPU  
4.  
USB connectors (10-1 pin USB 78, USB 9 10, USB 11 12)  
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.  
USB1112 USB910  
USB78  
®
PIN1  
PIN1  
PIN1  
P5K/EPU USB 2.0 connectors  
Never connect a 1394 cable to the USB connectors. Doing so will damage the  
motherboard!  
If your chassis suppots front panel USB ports, you can attach a front panel  
USB cable to these connectors. Connect the USB cable to ASUS Q-Connector  
(USB, blue) first, and then install the Q-Connector (USB) to the USB connector  
onboard.  
The USB module cable is purchased separately.  
5.  
IEEE 1394a port connector (10-1 pin IE1394_2)  
This connector is for a IEEE 1394a port. Connect the IEEE 1394a module  
cable to this connector, then install the module to a slot opening at the back  
of the system chassis.  
®
IE1394_2  
PIN 1  
P5K/EPU IEEE 1394a connector  
2-28  
Chapter 2: Hardware information  
Never connect a USB cable to the IEEE 1394a connector. Doing so will damage  
the motherboard!  
You can attach a FireWire/1394 cable to this connector if your chassis suppots  
the front panel IEEE1394 port. Connect the 1394 cable to ASUS Q-Connector  
(1394, red) first, and then install the Q-Connector (1394) to the 1394 connector  
onboard.  
The IEEE 1394a module cable is purchased separately.  
6.  
CPU, chassis and power fan connectors  
(4-pin CPU_FAN, 3-pin CHA_FAN1-2, 3-pin PWR_FAN)  
The fan connectors support cooling fans of 350 mA ~ 2000 mA (24 W max.)  
or a total of 1 A ~ 7 A (84 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!  
PWR_FAN  
CHA_FAN1  
GND  
GND  
+12V  
+12V  
Rotation  
Rotation  
®
CPU_FAN  
CPU FAN PWR  
CPU FAN IN  
CPU FAN PWM  
CHA_FAN2  
GND  
Rotation  
+12V  
GND  
P5K/EPU Fan connectors  
Only the CPU-FAN and CHA-FAN 1-2 connectors support the ASUS  
Q-Fan 2 feature.  
If you install two VGA cards, we recommend that you plug the rear chassis  
fan cable to the motherboard connector labled CHA_FAN1 or CHA_FAN2  
for better themal environment.  
2-29  
ASUS P5K/EPU  
7.  
Chassis intrusion connector (4-1 pin CHASSIS)  
This connector is for a chassis-mounted intrusion detection sensor or switch.  
Connect one end of the chassis intrusion sensor or switch cable to this  
connector. The chassis intrusion sensor or switch sends a high-level signal to  
this connector when a chassis component is removed or replaced. The signal  
is then generated as a chassis intrusion event.  
By default , the pin labeled “Chassis Signal” and “Ground” are shorted with  
a jumper cap. Remove the jumper caps only when you intend to use the  
chassis intrusion detection feature.  
®
CHASSIS  
(Default)  
P5K/EPU Chassis intrusion connector  
8.  
ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)  
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.  
EATXPWR  
ATX12V  
+12V DC  
GND  
+12V DC  
GND  
+3 Volts  
Ground  
+5 Volts  
+5 Volts  
+5 Volts  
-5 Volts  
Ground  
Ground  
Ground  
PSON#  
Ground  
-12 Volts  
+3 Volts  
+12 Volts  
+12 Volts  
+5V Standby  
Power OK  
Ground  
®
+5 Volts  
Ground  
+5 Volts  
Ground  
+3 Volts  
P5K/EPU ATX power connectors  
+3 Volts  
2-30  
Chapter 2: Hardware information  
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 400 W.  
Do not forget to connect the 4-pin ATX12V power plug; otherwise, the  
system will not boot.  
Use of a PSU with a higher power output is recommended when  
configuring a system with more power-consuming devices. The system  
may become unstable or may not boot up if the power is inadequate.  
If you want to use two high-end PCI Express x16 cards, use a PSU with  
500W to 600W power or above to ensure the system stability.  
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.  
The ATX 12 V Specification 2.0-compliant (400W) PSU has been tested  
to support the motherboard power requirements with the following  
configuration:  
CPU: Intel® Pentium® Extreme 3.73GHz  
Memory: 512 MB DDR3 (x4)  
Graphics card: ASUS EAX1900XT  
Parallel ATA device: IDE hard disk drive  
Serial ATA device: SATA hard disk drive (x2)  
Optical drive: DVD-RW  
9.  
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.  
AAFP  
HD Audio-compliant  
pin definition  
Legacy AC ‘97 audio  
pin definition  
SENSE2_RETUR  
PORT2 L  
NC  
Line out_L  
NC  
Line out_R  
MICPWR  
MIC2  
SENSE_SEND  
®
SENSE1_RETUR  
PRESENCE#  
GND  
PORT2 R  
PORT1 R  
PORT1 L  
NC  
NC  
AGND  
P5K/EPU Analog front panel 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, make sure that the Front Panel Type item in the BIOS is set to  
[HD Audio]. If you want to connect an AC' 97 front panel audio module to  
this connector, set the item to [AC97]. Refer to page 4-25 for details.  
2-31  
ASUS P5K/EPU  
10. Optical drive audio connector (4-pin CD)  
This connector allows you to receive stereo audio input from sound sources  
such as a CD-ROM, TV tuner, or MPEG card.  
CD  
(black)  
Right Audio Channel  
Ground  
Ground  
®
Left Audio Channel  
P5K/EPU Internal audio connector  
11. Digital audio connector (4-1 pin SPDIF_OUT, for ASUS HDMI VGA card)  
This connector is for an additional Sony/Philips Digital Interface (S/PDIF)  
port(s). If you are using ASUS HDMI-equipped graphics card, connect the  
HDMI card to this connector with a S/PDIF out cable.  
SPDIF_OUT  
®
P5K/EPU Digital audio connector  
The ASUS HDMI-equipped graphics card and S/PDIF out cable are purchased  
separately.  
2-32  
Chapter 2: Hardware information  
12. System panel connector (20-8 pin PANEL)  
This connector supports several chassis-mounted functions.  
PLED  
SPEAKER  
PANEL  
®
IDE_LED  
RESET  
PWRSW  
* Requires an ATX power supply.  
P5K/EPU System panel connector  
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.  
2-33  
ASUS P5K/EPU  
ASUS Q-Connector (system panel)  
You can use the ASUS Q-Connector to connect/disconnect chassis front panel  
cables in a few steps. Refer to the instructions below to install the ASUS Q-  
Connector.  
1.  
2.  
3.  
Connect the front panel cables to the  
ASUS Q-Connector.  
Refer to the labels on the Q-Connector  
to know the detailed pin definitions, then  
match them to the respective front panel  
cable labels.  
Install the ASUS Q-Connector to the  
system panel connector, making sure  
the orientation matches the labels on the  
motherboard.  
The front panel functions are now enabled.  
The figure shows the Q-Connector properly  
installed on the motherboard.  
2-34  
Chapter 2: Hardware information  
This chapter describes the power up  
sequence, the vocal POST messages,  
and ways of shutting down the system.  
Powering up  
3
Chapter summary  
3
3.1  
Starting up for the first time........................................................ 3-1  
3.2  
Turning off the computer............................................................. 3-2  
ASUS P5K/EPU  
3.1  
Starting up for the first time  
1.  
2.  
3.  
After making all the connections, replace the system case cover.  
Be sure that all switches are off.  
Connect the power cord to the power connector at the back of the system  
chassis.  
4.  
5.  
Connect the power cord to a power outlet that is equipped with a surge  
protector.  
Turn on the devices in the following order:  
a. Monitor  
b. External SCSI devices (starting with the last device on the chain)  
c. System power  
6.  
After applying power, the system power LED on the system front panel case  
lights up. For systems with ATX power supplies, the system LED lights up  
when you press the ATX power button. If your monitor complies with “green”  
standards or if it has a “power standby” feature, the monitor LED may light up  
or switch between orange and green after the system LED turns on.  
The system then runs the power-on self tests or POST. While the tests are  
running, the BIOS beeps (see BIOS beep codes table below) or additional  
messages appear on the screen. If you do not see anything within 30  
seconds from the time you turned on the power, the system may have failed a  
power-on test. Check the jumper settings and connections or call your retailer  
for assistance.  
BIOS Beep  
Description  
One short beep  
VGA detected  
Quick boot set to disabled  
No keyboard detected  
One continuous beep followed by two  
short beeps then a pause (repeated)  
No memory detected  
One continuous beep followed by three  
short beeps  
No VGA detected  
One continuous beep followed by four  
short beeps  
Hardware component failure  
7.  
At power on, hold down the <Delete> key to enter the BIOS Setup. Follow the  
instructions in Chapter 4.  
ASUS P5K/EPU  
3-1  
3.2  
Turning off the computer  
3.2.1  
Using the OS shut down function  
If you are using Windows® XP:  
1.  
2.  
3.  
Click the Start button then select Turn Off Computer.  
Click the Turn Off button to shut down the computer.  
The power supply should turn off after Windows® shuts down.  
If you are using Windows® Vista:  
1.  
2.  
Click the Start button then select ShutDown.  
The power supply should turn off after Windows® shuts down.  
3.2.2  
Using the dual function power switch  
While the system is ON, pressing the power switch for less than four seconds puts  
the system to sleep mode or to soft-off mode, depending on the BIOS setting.  
Pressing the power switch for more than four seconds lets the system enter the  
soft-off mode regardless of the BIOS setting. Refer to section 4.5 Power Menu in  
Chapter 4 for details.  
3-2  
Chapter 3: Powering up  
This chapter tells how to change  
the system settings through the BIOS  
Setup menus. Detailed descriptions  
of the BIOS parameters are also  
provided.  
BIOS setup  
4
Chapter summary  
4
4.1  
4.2  
4.3  
4.4  
4.5  
4.6  
4.7  
4.8  
Managing and updating your BIOS ............................................ 4-1  
BIOS setup program .................................................................... 4-8  
Main menu .................................................................................. 4-11  
Advanced menu ......................................................................... 4-16  
Power menu................................................................................ 4-26  
Boot menu .................................................................................. 4-30  
Tools menu ................................................................................. 4-34  
Exit menu.................................................................................... 4-37  
ASUS P5K/EPU  
4.1  
Managing and updating your BIOS  
The following utilities allow you to manage and update the motherboard Basic  
Input/Output System (BIOS) setup.  
1.  
2.  
3.  
4.  
ASUS Update (Updates the BIOS in Windows® environment.)  
ASUS EZ Flash 2 (Updates the BIOS using a floppy disk or USB flash disk.)  
ASUS AFUDOS (Updates the BIOS using a bootable floppy disk)  
ASUS CrashFree BIOS 3 (Updates the BIOS using a USB flash disk or the  
motherboard support DVD when the BIOS file fails or gets corrupted.)  
Refer to the corresponding sections for details on these utilities.  
Save a copy of the original motherboard BIOS file to a bootable floppy disk or  
USB flash disk in case you need to restore the BIOS in the future. Copy the  
original motherboard BIOS using the ASUS Update or AFUDOS utilities.  
4.1.1  
ASUS Update utility  
The ASUS Update is a utility that allows you to manage, save, and update the  
motherboard BIOS in Windows® environment. The ASUS Update utility allows you  
to:  
Save the current BIOS file  
Download the latest BIOS file from the Internet  
Update the BIOS from an updated BIOS file  
Update the BIOS directly from the Internet, and  
View the BIOS version information.  
This utility is available in the support DVD that comes with the motherboard  
package.  
ASUS Update requires an Internet connection either through a network or an  
Internet Service Provider (ISP).  
Installing ASUS Update  
To install ASUS Update:  
1.  
2.  
3.  
Place the support DVD in the optical drive. The Drivers menu appears.  
Click the Utilities tab, then click Install ASUS Update VX.XX.XX.  
The ASUS Update utility is copied to your system.  
Quit all Windows® applications before you update the BIOS using this utility.  
4-1  
ASUS P5K/EPU  
Updating the BIOS through the Internet  
To update the BIOS through the Internet:  
1.  
Launch the ASUS Update utility from the Windows® desktop by clicking Start  
> Programs > ASUS > ASUSUpdate > ASUSUpdate. The ASUS Update  
main window appears.  
3.  
Select the ASUS FTP site nearest  
you to avoid network traffic, or  
click Auto Select. Click Next.  
2.  
Select Update BIOS from the  
Internet option from the drop-down  
menu, then click Next.  
4-2  
Chapter 4: BIOS setup  
4.  
5.  
From the FTP site, select the BIOS  
version that you wish to download.  
Click Next.  
Follow the screen instructions to  
complete the update process.  
The ASUS Update utility is  
capable of updating itself through  
the Internet. Always update the  
utility to avail all its features.  
Updating the BIOS through a BIOS file  
To update the BIOS through a BIOS file:  
1.  
2.  
Launch the ASUS Update utility from the Windows® desktop by clicking Start  
> Programs > ASUS > ASUSUpdate > ASUSUpdate. The ASUS Update  
main window appears.  
Select Update BIOS from a file  
option from the drop-down menu,  
then click Next.  
3.  
Locate the BIOS file from the Open  
window, then click Open.  
P5K/EPU.ROM  
4.  
Follow the screen instructions to  
complete the update process.  
P5K/EPU  
4-3  
ASUS P5K/EPU  
4.1.2  
ASUS EZ Flash 2 utility  
The ASUS EZ Flash 2 feature allows you to update the BIOS without having to go  
through the long process of booting from a floppy disk and using a DOS-based  
utility. The EZ Flash 2 utility is built-in the BIOS chip so it is accessible by pressing  
<Alt> + <F2> during the Power-On Self Tests (POST).  
To update the BIOS using EZ Flash 2:  
1.  
2.  
Visit the ASUS website (www.asus.com) to download the latest BIOS file for  
the motherboard.  
Save the BIOS file to a floppy disk or a USB flash disk, then restart the  
system.  
3.  
You can launch the EZ Flash 2 by two methods.  
(1) Insert the floppy disk / USB flash disk that contains the BIOS file to the  
floppy disk drive or the USB port.  
Press <Alt> + <F2> during POST to display the following.  
ASUSTek EZ Flash 2 BIOS ROM Utility V3.06  
FLASH TYPE: WINBOND W25X80  
Current ROM  
BOARD: P5K/EPU  
VER: 0004  
Update ROM  
BOARD: Unknown  
VER: Unknown  
DATE: 09/13/07  
DATE: Unknown  
PATH: A:\  
A:  
Note  
[Enter] Select or Load  
[B] Backup  
[ESC] Exit  
[Tab] Switch  
[Up/Down/Home/End] Move  
(2) Enter BIOS setup program. Go to the Tools menu to select EZ Flash 2  
and press <Enter> to enable it.  
You can switch between drives by pressing <Tab> before the correct file  
is found. Then press <Enter>.  
4.  
When the correct BIOS file is found, EZ Flash 2 performs the BIOS update  
process and automatically reboots the system when done.  
This function can support devices such as USB flash disk, or 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  
system boot failure!  
4-4  
Chapter 4: BIOS setup  
4.1.3  
AFUDOS utility  
The AFUDOS utility allows you to update the BIOS file in DOS environment using  
a bootable floppy disk with the updated BIOS file. This utility also allows you to  
copy the current BIOS file that you can use as backup when the BIOS fails or gets  
corrupted during the updating process.  
Copying the current BIOS  
To copy the current BIOS file using the AFUDOS utility:  
Make sure that the floppy disk is not write-protected and has at least  
1024KB free space to save the file.  
The succeeding BIOS screens are for reference only. The actual BIOS  
screen displays may not be same as shown.  
1.  
2.  
Copy the AFUDOS utility (afudos.exe) from the motherboard support DVD to  
the bootable floppy disk you created earlier.  
Boot the system in DOS mode, then at the prompt type:  
afudos /o[filename]  
where the [filename] is any user-assigned filename not more than eight  
alphanumeric characters for the main filename and three alphanumeric  
characters for the extension name.  
A:\>afudos /oOLDBIOS1.rom  
Main filename Extension name  
3.  
Press <Enter>. The utility copies the current BIOS file to the floppy disk.  
A:\>afudos /oOLDBIOS1.rom  
AMI Firmware Update Utility - Version 1.19(ASUS V2.07(03.11.24BB))  
Copyright (C) 2002 American Megatrends, Inc. All rights reserved.  
Reading flash ..... done  
Write to file...... ok  
A:\>  
The utility returns to the DOS prompt after copying the current BIOS file.  
Updating the BIOS file  
To update the BIOS file using the AFUDOS utility:  
1.  
Visit the ASUS website (www.asus.com) and download the latest BIOS file for  
the motherboard. Save the BIOS file to a bootable floppy disk.  
4-5  
ASUS P5K/EPU  
Write the BIOS filename on a piece of paper. You need to type the exact BIOS  
filename at the DOS prompt.  
2.  
3.  
Copy the AFUDOS utility (afudos.exe) from the motherboard support DVD to  
the bootable floppy disk you created earlier.  
Boot the system in DOS mode, then at the prompt type:  
afudos /i[filename]  
where [filename] is the latest or the original BIOS file on the bootable floppy  
disk.  
A:\>afudos /P5KEPU.ROM  
4.  
The utility verifies the file and starts updating the BIOS.  
A:\>afudos /P5KEPU.ROM  
AMI Firmware Update Utility - Version 1.19(ASUS V2.07(03.11.24BB))  
Copyright (C) 2002 American Megatrends, Inc. All rights reserved.  
WARNING!! Do not turn off power during flash BIOS  
Reading file ....... done  
Reading flash ...... done  
Advance Check ......  
Erasing flash ...... done  
Writing flash ...... 0x0008CC00 (9%)  
DO NOT shut down or reset the system while updating the BIOS to prevent  
system boot failure!  
5.  
The utility returns to the DOS prompt after the BIOS update process is  
completed. Reboot the system from the hard disk drive.  
A:\>afudos /P5KEPU.ROM  
AMI Firmware Update Utility - Version 1.19(ASUS V2.07(03.11.24BB))  
Copyright (C) 2002 American Megatrends, Inc. All rights reserved.  
WARNING!! Do not turn off power during flash BIOS  
Reading file ....... done  
Reading flash ...... done  
Advance Check ......  
Erasing flash ...... done  
Writing flash ...... done  
Verifying flash .... done  
Please restart your computer  
A:\>  
4-6  
Chapter 4: BIOS setup  
4.1.4  
ASUS CrashFree BIOS 3 utility  
The ASUS CrashFree BIOS 3 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  
update a corrupted BIOS file using the motherboard support DVD or the USB flash  
disk that contains the updated BIOS file.  
Prepare the motherboard support DVD or the USB flash disk containing the  
updated motherboard BIOS before using this utility.  
Recovering the BIOS from the support DVD  
To recover the BIOS from the support DVD:  
1.  
2.  
3.  
Turn on the system.  
Insert the motherboard support DVD to the optical drive.  
The utility displays the following message and automatically checks the DVD  
for the BIOS file.  
Bad BIOS checksum. Starting BIOS recovery...  
Checking for floppy...  
When found, the utility reads the BIOS file and starts flashing the corrupted  
BIOS file.  
Bad BIOS checksum. Starting BIOS recovery...  
Checking for floppy...  
Floppy found!  
Reading file “P5KEPU.ROM”. Completed.  
Start flashing...  
4.  
Restart the system after the utility completes the updating process.  
Recovering the BIOS from the USB flash disk  
To recover the BIOS from the USB flash disk:  
1.  
Insert the USB flash disk that contains BIOS file to the USB port.  
2.  
Turn on the system.  
3.  
The utility will automatically checks the devices for the BIOS file When found,  
the utility reads the BIOS file and starts flashing the corrupted BIOS file.  
4.  
Restart the system after the utility completes the updating process.  
Only the USB flash disk with FAT 32/16 format and single partition can  
support ASUS CrashFree BIOS 3. The device size should be smaller than  
8GB.  
DO NOT shut down or reset the system while updating the BIOS! Doing so  
can cause system boot failure!  
4-7  
ASUS P5K/EPU  
4.2  
BIOS setup program  
This motherboard supports a programmable Serial Peripheral Interface (SPI) chip  
that you can update using the provided utility described in section 4.1 Managing  
and updating your BIOS.  
Use the BIOS Setup program when you are installing a motherboard, reconfiguring  
your system, or prompted to “Run Setup.” This section explains how to configure  
your system using this utility.  
Even if you are not prompted to use the Setup program, you can change the  
configuration of your computer in the future. For example, you can enable the  
security password feature or change the power management settings. This  
requires you to reconfigure your system using the BIOS Setup program so that the  
computer can recognize these changes and record them in the CMOS RAM of the  
SPI chip.  
The SPI chip on the motherboard stores the Setup utility. When you start up the  
computer, the system provides you with the opportunity to run this program. Press  
<Del> during the Power-On Self-Test (POST) to enter the Setup utility; otherwise,  
POST continues with its test routines.  
If you wish to enter Setup after POST, restart the system by pressing  
<Ctrl+Alt+Delete>, or by pressing the reset button on the system chassis. You can  
also restart by turning the system off and then back on. Do this last option only if  
the first two failed.  
The Setup program is designed to make it as easy to use as possible. Being a  
menu-driven program, it lets you scroll through the various sub-menus and make  
your selections from the available options using the navigation keys.  
The default BIOS settings for this motherboard apply for most conditions  
to ensure optimum performance. If the system becomes unstable after  
changing any BIOS settings, load the default settings to ensure system  
compatibility and stability. Select the Load Setup Defaults item under the  
Exit Menu. See section 4.8 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.  
Visit the ASUS website (www.asus.com) to download the latest BIOS file for  
this motherboard.  
4-8  
Chapter 4: BIOS setup  
4.2.1  
Menu items  
Main  
BIOS menu screen  
Menu bar  
Configuration fields  
General help  
BIOS SETUP UTILITY  
Boot  
Advanced  
Power  
Tools  
Exit  
Use [ENTER], [TAB]  
or [SHIFT-TAB] to  
select a field.  
System Time  
System Date  
Floppy Diskette A  
Language  
[10:55:25]  
[Thu 04/14/2007]  
[1.44M, 3.5 in.]  
[English]  
Use [+] or [-] to  
configure the System  
Time.  
SATA1  
SATA2  
SATA3  
SATA4  
[Not Detected]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
Select Screen  
Select Item  
SATA Configuration  
System Information  
Change Field  
+-  
Tab  
F1  
Select Field  
General Help  
Save and Exit  
Exit  
F10  
ESC  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
Sub-menu items  
Navigation keys  
4.2.2  
Menu bar  
The menu bar on top of the screen has the following main items:  
Main  
For changing the basic system configuration  
Advanced  
Power  
For changing the advanced system settings  
For changing the advanced power management (APM)  
configuration  
Boot  
Tools  
Exit  
For changing the system boot configuration  
For configuring options for special functions  
For selecting the exit options and loading default  
settings  
To select an item on the menu bar, press the right or left arrow key on the keyboard  
until the desired item is highlighted.  
4.2.3  
Navigation keys  
At the bottom right corner of a menu screen are the navigation keys for that  
particular menu. Use the navigation keys to select items in the menu and change  
the settings.  
The navigation keys may differ from one screen to another.  
4-9  
ASUS P5K/EPU  
4.2.4  
Menu items  
Use [ENTER], [TAB],  
or [SHIFT-TAB] to  
select a field.  
System Time  
System Date  
Floppy Diskette A  
Language  
[06:22:54]  
The highlighted item on the menu bar  
displays the specific items for that  
menu. For example, selecting Main  
shows the Main menu items.  
[Thu 04/14/2007]  
[1.44M, 3.5 in.]  
[English]  
Use [+] or [-] to  
configure system.  
SATA1  
SATA2  
SATA3  
SATA4  
SATA5  
SATA6  
[Not Detected]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
SATA Configuration  
System Information  
The other items (Advanced, Power,  
Boot, and Exit) on the menu bar have  
their respective menu items.  
Main menu items  
4.2.5  
Sub-menu items  
A solid triangle before each item on any menu screen means that the iteam has a  
sub-menu. To display the sub-menu, select the item and press <Enter>.  
4.2.6  
Configuration fields  
These fields show the values for the menu items. If an item is user- configurable,  
you can change the value of the field opposite the item. You cannot select an item  
that is not user-configurable.  
A configurable field is enclosed in brackets, and is highlighted when selected. To  
change the value of a field, select it then press <Enter> to display a list of options.  
Refer to 4.2.7 Pop-up window.  
4.2.7  
Pop-up window  
Select a menu item then press <Enter> to display a pop-up window with the  
configuration options for that item.  
4.2.8  
Scroll bar  
A scroll bar appears on the right side of a  
menu screen when there are items that do  
not fit on the screen. Press the  
Up/Down arrow keys or <Page Up> /<Page  
Down> keys to display the other items on  
the screen.  
Pop-up window  
4.2.9  
General help  
At the top right corner of the menu screen  
is a brief description of the selected item.  
Scroll bar  
4-10  
Chapter 4: BIOS setup  
4.3  
Main menu  
When you enter the BIOS Setup program, the Main menu screen appears, giving  
you an overview of the basic system information.  
Refer to section 4.2.1 BIOS menu screen for information on the menu screen  
items and how to navigate through them.  
BIOS SETUP UTILITY  
Main  
Advanced  
Power  
Boot  
Tools  
Exit  
Use [ENTER], [TAB]  
or [SHIFT-TAB] to  
select a field.  
System Time  
System Date  
Floppy Diskette A  
Language  
[10:55:25]  
[Thu 09/20/2007]  
[1.44M, 3.5 in.]  
[English]  
Use [+] or [-] to  
configure the System  
Time.  
SATA1  
SATA2  
SATA3  
SATA4  
SATA5  
SATA6  
[Not Detected]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
[Not Detected]  
Select Screen  
Select Item  
SATA Configuration  
System Information  
Change Field  
+-  
Tab  
F1  
Select Field  
General Help  
Save and Exit  
Exit  
F10  
ESC  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
4.3.1  
System Time [xx:xx:xx]  
Allows you to set the system time.  
4.3.2  
System Date [Day xx/xx/xxxx]  
Allows you to set the system date.  
4.3.3  
Floppy Diskette A [1.44M, 3.5 in.]  
Sets the type of floppy drive installed.  
Configuration options: [Disabled] [720K , 3.5 in.] [1.44M, 3.5 in.]  
4-11  
ASUS P5K/EPU  
4.3.4  
SATA 1-4  
While entering Setup, the BIOS automatically detects the presence of Serial ATA  
devices. There is a separate sub-menu for each SATA device. Select a device item  
then press <Enter> to display the SATA device information.  
BIOS SETUP UTILITY  
Main  
SATA 1  
Select the type of  
device connected to  
the system.  
Device  
: Hard Disk  
: WDC WD800JD-00LSA0  
: 80.0GB  
Vendor  
Size  
LBA Mode  
Block Mode  
PIO Mode  
Async DMA  
Ultra DMA  
: Supported  
: 16 Sectors  
: 4  
: MultiWord DMA-2  
: Ultra DMA-5  
SMART Monitoring: Supported  
Type  
[Auto]  
[Auto]  
Select Screen  
Select Item  
LBA/Large Mode  
Block(Multi-Sector Transfer) [Auto]  
PIO Mode  
DMA Mode  
[Auto]  
Change Option  
+-  
F10  
ESC  
F1  
General Help  
Save and Exit  
Exit  
[Auto]  
SMART Monitoring  
32Bit Data Transfer  
[Auto]  
[Enabled]  
v02.58 (C)Copyright 1985-2007, American Megatrends, Inc.  
The BIOS automatically detects the values opposite the dimmed items (Device,  
Vendor, Size, LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and  
SMART monitoring). These values are not user-configurable. These items show  
N/A if no IDE device is installed in the system.  
Type [Auto]  
Selects the type of IDE drive. Setting to [Auto] allows automatic selection of the  
appropriate IDE device type. Select [DVDROM] if you are specifically configuring a  
DVD-ROM drive. Select [ARMD] (ATAPI Removable Media Device) if your device  
is either a ZIP, LS-120, or MO drive.  
Configuration options: [Not Installed] [Auto] [DVDROM] [ARMD]  
LBA/Large Mode [Auto]  
Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the  
device supports this mode, and if the device was not previously formatted with LBA  
mode disabled. Configuration options: [Disabled] [Auto]  
Block (Multi-Sector Transfer) [Auto]  
Enables or disables data multi-sectors transfers. When set to [Auto], the data  
transfer from and to the device occurs multiple sectors at a time if the device  
supports multi-sector transfer feature. When set to [Disabled], the data transfer  
from and to the device occurs one sector at a time.  
Configuration options: [Disabled] [Auto]  
PIO Mode [Auto]  
Allows you to select the data transfer mode.  
Configuration options: [Auto] [0] [1] [2] [3] [4]  
4-12  
Chapter 4: BIOS setup  
DMA Mode [Auto]  
Selects the DMA mode.  
Configuration options: [Auto] [SWDMA0] [SWDMA1] [SWDMA2] [MWDMA0]  
[MWDMA1] [MWDMA2] [UDMA0] [UDMA1] [UDMA2] [UDMA3] [UDMA4] [UDMA5]  
SMART Monitoring [Auto]  
Sets the Smart Monitoring, Analysis, and Reporting Technology.  
Configuration options: [Auto] [Disabled] [Enabled]  
32Bit Data Transfer [Enabled]  
Enables or disables 32-bit data transfer.  
Configuration options: [Disabled] [Enabled]  
4.3.5  
SATA Configuration  
The items in this menu allow you to set or change the configurations for the SATA  
devices installed in the system. Select an item then press <Enter> if you want to  
configure the item.  
SATA Configuration  
Options  
SATA Configuraton  
Configure SATA as  
[Enhanced]  
[IDE]  
Disabled  
Compatible  
Enhanced  
Hard Disk Write Protect  
SATA Detect Time Out (Sec)  
[Disabled]  
[35]  
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]  
If you want to use the Serial ATA hard disk drives as Parallel ATA physical  
storage devices, keep the default setting [IDE].  
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]  
SATA 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]  
4-13  
ASUS P5K/EPU  
4.3.6  
System Information  
This menu gives you an overview of the general system specifications. The BIOS  
automatically detects the items in this menu.  
BIOS SETUP UTILITY  
Main  
AMIBIOS  
Version  
: 0004  
Build Date : 09/13/07  
Processor  
Type  
: Intel(R) Core(TM)2 Duo CPU @ 3.00GHz  
: 3000 MHz  
: 2  
Speed  
Count  
System Memory  
Available  
: 512 MB  
Select Screen  
Select Item  
General Help  
Save and Exit  
Exit  
F1  
F10  
ESC  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
AMIBIOS  
Displays the auto-detected BIOS information.  
Processor  
Displays the auto-detected CPU specification.  
System Memory  
Displays the auto-detected system memory.  
4-14  
Chapter 4: BIOS setup  
4.4  
Advanced menu  
The Advanced menu items allow you to change the settings for the CPU and other  
system devices.  
Take caution when changing the settings of the Advanced menu items. Incorrect  
field values can cause the system to malfunction.  
BIOS SETUP UTILITY  
Main  
Advanced  
Power  
Boot  
Tools  
Exit  
JumperFree Configuration  
USB Configuration  
CPU Configuration  
Chipset  
Onboard Devices Configuration  
PCIPnP  
Select Screen  
Select Item  
Enter Go to Sub Screen  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
4.4.1  
JumperFree Configuration  
BIOS SETUP UTILITY  
Advanced  
Configure System Frequency/Voltage  
Select the target CPU  
frequency, and the  
relevant parameters  
will be auto-adjusted.  
Frequencies higher  
than CPU manufacturer  
recommends are not  
guaranteed to be  
Ai Overclocking  
[Auto]  
[Auto]  
[Auto]  
[Auto]  
[Auto]  
[Auto]  
[Auto]  
CPU Ratio Control  
FSB Strap to North Bridge  
DRAM Frequency  
DRAM Command Rate  
DRAM Timing Control  
DRAM Static Read Control  
stable. If the system  
becomes unstable,  
return to the default.  
Transaction Booster  
[Auto]  
CPU Spread Spectrum  
PCIE Spread Spectrum  
[Auto]  
[Auto]  
Ai Overclocking [Auto]  
Allows selection of CPU overclocking options to achieve desired CPU internal  
frequency. Selct either one of the preset overclocking configuration options:  
Allows you to individually set overclocking parameters.  
Loads the optimal settings for the system.  
Manual  
Auto  
Loads the standard settings for the system.  
Standard  
4-15  
ASUS P5K/EPU  
CPU Ratio Control [Auto]  
Configuration options: [Auto] [Manual]  
The following item appears when the CPU Ratio Control item is set to  
[Manual].  
Ratio CMOS Setting [9]  
Sets the ratio between CPU Core Clock and the FSB Frequency.  
Use the <+> and <-> keys to select the CMOS ratio values from 6 to 9.  
FSB Strap to North Bridge [Auto]  
FSB Strap will be adjusted automatically by FSB Frequency and DRAM Frequency.  
Configuration options: [Auto] [200MHz] [266MHz] [333MHz].  
The following two items only appear when you set the Ai Overclocking item to  
[Manual].  
FSB Frequency [333]  
Displays the frequency sent by the clock generator to the system bus and PCI bus.  
The value of this item is auto-detected by the BIOS. Use the <+> and <-> keys to  
adjust the FSB frequency. You can also type the desired CPU frequency using the  
numeric keypad. The values range from 200 to 800. Refer to the table below for  
the correct Front Side Bus and CPU External Frequency settings.  
FSB/CPU External Frequency Synchronization  
Front Side Bus  
FSB 1066  
CPU External Frequency  
266 MHz  
FSB 800  
200 MHz  
PCIE Frequency [Auto]  
Allows you to set the PCI Express frequency.  
Configuration options: [Auto] [100] [101] ~ [149] [150]  
DRAM Frequency [Auto]  
Allows you to set the DDR2 operating frequency.  
Configuration options: [Auto] [DDR2-667MHz] [DDR2-800MHz] [DDR2-835MHz]  
[DDR2-887MHz] [DDR2-1002MHz] [DDR2-1066MHz] [DDR2-1111MHz]  
[DDR2-1335MHz]  
Selecting a very high DRAM frequency may cause the system to become  
unstable! If this happens, revert to the default setting.  
The configuration options of the DRAM Frequency item may differ  
according to the CPU and the DIMM(s) you install.  
4-16  
Chapter 4: BIOS setup  
DRAM Command Rate [Auto]  
Configuration options: [Auto] [1T] [2T]  
DRAM Timing Control [Auto]  
Configuration options: [Auto] [Manual]  
The following items appear when you set the DRAM Timing Control item to  
[Manual].  
CAS# Latency [5 DRAM Clocks]  
Configuration options: [3 DRAM Clocks] [4 DRAM Clocks] [5 DRAM Clocks]  
[6 DRAM Clocks]  
RAS# to CAS# Delay [5 DRAM Clocks]  
Configuration options: [3 DRAM Clocks] [4 DRAM Clocks] [5 DRAM Clocks]  
[6 DRAM Clocks]~[10 DRAM Clocks]  
RAS# Precharge [5 DRAM Clocks]  
Configuration options: [3 DRAM Clocks] [4 DRAM Clocks] [5 DRAM Clocks]  
[6 DRAM Clocks]~[10 DRAM Clocks]  
RAS# Activate Time [15 DRAM Clocks]  
Configuration options: [3 DRAM Clocks] [4 DRAM Clocks]~[17 DRAM Clocks]  
[18 DRAM Clocks]  
RAS# to RAS# Delay [Auto]  
Configuration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM  
Clocks] [15 DRAM Clocks]  
Row Refresh CycleTime [Auto]  
Configuration options: [Auto] [20 DRAM Clocks] [25 DRAM Clocks] [30  
DRAM Clocks] [35 DRAM Clocks] [42 DRAM Clocks]  
Write Recovery Time [Auto]  
Configuration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM  
Clocks] [15 DRAM Clocks]  
Write to Read Delay [Auto]  
Configuration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM  
Clocks] [15 DRAM Clocks]  
Read to Precharge Time [Auto]  
Configuration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM  
Clocks] [15 DRAM Clocks]  
DRAM Static Read Control [Auto]  
Configuration options: [Auto] [Disabled] [Enabled]  
4-17  
ASUS P5K/EPU  
Transaction Booster [Auto]  
Configuration options: [Auto] [Disabled] [Enabled]  
Relax Level [0]  
This sub-item appears only when you set the Transaction Booster item to  
[Disabled]. Set this item to a higher level to get better compatibility. Use the  
<+> and <-> keys to adjust the value. The values range from 0 to 3.  
Boost Level [0]  
This sub-item appears only when you set the Transaction Booster item to  
[Enabled]. Set this item to a higher level to get better performance. Use the  
<+> and <-> keys to adjust the value. The values range from 0 to 3.  
The following items only appear when you set the Ai Overclocking item to  
[Manual] or [Standard] and are adjusted by typing the desired values using the  
numeric keypad and press the <Enter> key. Use the <+> and <-> keys to adjust  
the value. To restore the default setting, type [auto] using the keyboard and  
press the <Enter> key.  
CPU Voltage [Auto]  
Allows you to set the CPU VCore voltage. The values range from 1.10000V to  
1.70000V with a 0.00625V interval.  
Refer to the CPU documentation before setting the CPU voltage. Setting a high  
voltage may damage the CPU!  
CPU PLL Voltage [Auto]  
Allows you to set the CPU PLL voltage. The values range from 1.50V to 2.78V with  
a 0.02V interval.  
FSB Termination Voltage [Auto]  
Allows you to select the front side bus termination voltage. The values range from  
1.20V to 1.50V with a 0.02V interval.  
Setting a high FSB termination voltage may damage the chipset and CPU.  
DRAM Voltage [Auto]  
Allows you to select the DRAM reference voltage. The values range from 1.80V to  
3.08V with a 0.02V interval.  
Refer to the DDR2 documentation before adjusting the memory voltage. Setting  
a very high memory voltage may damage the memory module(s)!  
North Bridge Voltage [Auto]  
Allows you to select the north bridge voltage. The values range from 1.25V to  
1.91V with a 0.02V interval.  
4-18  
Chapter 4: BIOS setup  
Setting the CPU PLL Voltage, FSB Termination Voltage, DRAM Voltage  
and North Bridge Voltage to a high level may damage the chipset, memory  
module, and CPU permanently. Proceed with caution.  
Some values of the CPU PLL Voltage, FSB Termination Voltage, DRAM  
Voltage and North Bridge Voltage items are labeled in different color,  
indicating the risk levels of high voltage settings. Refer to the table below  
for details.  
The system may need better cooling system to work stably under high  
voltage settings.  
Blue  
1.50V~1.78V 1.80V~2.00V 2.02V~2.20V 2.22V~2.78V  
N/A  
Yellow  
Purple  
Red  
CPU PLL Voltage  
FSB Termination Voltage 1.20V~1.38V 1.40V~1.50V N/A  
DRAM Voltage  
1.80V~1.98V 2.00V~2.20V 2.22V~2.40V 2.42V~3.08V  
1.25V~1.41V 1.43V~1.55V 1.57V~1.73V 1.75V~1.91V  
North Bridge Voltage  
South Bridge Voltage [Auto]  
Allows you to select the south bridge voltage. The values range from 1.05V to  
1.20V with a 0.15V interval.  
Clock Over-Charging Mode [Auto]  
The values range from 0.70V to 1.00V with a 0.10V interval.  
Load-Line Calibration [Auto]  
Configuration options: [Auto] [Disabled] [Enabled]  
CPU Voltage Reference [Auto]  
Configuration options: [Auto] [0.63x] [0.61x] [0.59x] [0.57x]  
North Bridge Voltage Reference [Auto]  
Configuration options: [Auto] [0.67x] [0.61x]  
CPU Spread Spectrum [Auto]  
Allows you to enable or disable the CPU spread spectrum.  
Configuration options: [Auto] [Disabled]  
PCIE Spread Spectrum [Auto]  
Allows you to enable or disable the PCIE spread spectrum.  
Configuration options: [Auto] [Disabled]  
4-19  
ASUS P5K/EPU  
4.4.2  
USB Configuration  
The items in this menu allows you to change the USB-related features. Select an  
item then press <Enter> to display the configuration options.  
BIOS SETUP UTILITY  
Advanced  
USB Configuration  
Options  
USB Devices Enabled:  
None  
Disabled  
Enabled  
USB Functions  
[Enabled]  
[Enabled]  
[HiSpeed]  
[Enabled]  
[Disabled]  
[Auto]  
USB 2.0 Controller  
USB 2.0 Controller Mode  
BIOS EHCI Hand-off  
Port 64/60 Emulation  
Legacy USB Support  
Select Screen  
Select Item  
Change Option  
+-  
F10  
ESC  
F1  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
The USB Devices Enabled item shows the auto-detected values. If no USB  
device is detected, the item shows None.  
USB Functions [Enabled]  
Allows you to enable or disable the USB Host Controllers.  
Configuration options: [Disabled] [Enabled]  
The following items appear only when you set USB Functions to [Enabled].  
USB 2.0 Controller [Enabled]  
Allows you to enable or disable the USB 2.0 controller.  
Configuration options: [Enabled] [Disabled]  
USB 2.0 Controller Mode [HiSpeed]  
Allows you to set the USB 2.0 controller mode to HiSpeed (480 Mbps) or  
FullSpeed (12 Mbps). Configuration options: [FullSpeed] [HiSpeed]  
The USB 2.0 Controller Mode item appears only when you enable the USB  
2.0 Controller item.  
BIOS EHCI Hand-off [Enabled]  
Allows you to enable the support for operating systems without an EHCI hand-off  
feature. Configuration options: [Disabled] [Enabled]  
Port 64/60 Emulation [Disabled]  
Allows you to enable or disable the I/O port 60h/64h emulation support. This item  
should be enabled for the complete USB keyboard legacy support for non-USB  
aware OSes. Configuration options: [Disabled] [Enabled]  
4-20  
Chapter 4: BIOS setup  
Legacy USB Support [Auto]  
Allows you to enable or disable the support for legacy USB devices. Setting to  
[Auto] 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.  
Configuration options: [Disabled] [Enabled] [Auto]  
4-21  
ASUS P5K/EPU  
4.4.3  
CPU Configuration  
The items in this menu show the CPU-related information that the BIOS  
automatically detects.  
BIOS SETUP UTILITY  
Advanced  
Configure advanced CPU settings  
Options  
Auto  
Manual  
Manufacturer: Intel  
Brand String: Intel(R) Core(TM)2 Duo CPU @ 3.00GHz  
Frequency  
FSB Speed  
Cache L1  
Cache L2  
CPUID  
: 3.00GHz  
: 1333MHz  
: 64 KB  
: 4096 KB  
: 6F9  
Ratio Status: Unlocked (Max:09, Min:06)  
Ratio Actual Value : 9  
CPU Ratio Control  
[Auto]  
C1E Support  
[Enabled]  
[Enabled]  
[Enabled]  
[Enabled]  
[Disabled]  
[Enabled]  
CPU TM Function  
Select Screen  
Select Item  
Vanderpool Technology  
Execute Disable Bit  
Max CPUID Value Limit  
Intel(R) SpeedStep(TM) Tech.  
Change Option  
+-  
F10  
ESC  
F1  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
CPU Ratio Control [Auto]  
Configuration options: [Auto] [Manual]  
The following item appears when the item CPU Ratio Control is set to  
[Manual].  
Ratio CMOS Setting: [ 9]  
Allows you to set the ratio between the CPU Core Clock and the FSB  
Frequency. Use <+> and <-> to adjust the value.  
Configuration options: [ 6] [ 7] [ 8] [ 9]  
C1E Support [Enabled]  
Allows you to enable or disable C1E Support.  
Configuration options: [Disabled] [Enabled]  
CPU TM Function [Enabled]  
Configuration options: [Disabled] [Enabled]  
Vanderpool Technology [Enabled]  
Configuration options: [Disabled] [Enabled]  
Execute Disable Bit [Enabled]  
Allows you to enable or disable the No-Execution Page Protection Technology.  
Setting this item to [Disabled] forces the XD feature flag to always return to zero  
(0). Configuration options: [Disabled] [Enabled]  
4-22  
Chapter 4: BIOS setup  
Max CPUID Value Limit [Disabled]  
Setting this item to [Enabled] allows legacy operating systems to boot even without  
support for CPUs with extended CPUID functions.  
Configuration options: [Disabled] [Enabled]  
The following item appears only when you set the CPU Ratio Control to [Auto]  
Intel(R) SpeedStep (TM) Tech. [Disabled]  
Configuration options: [Enabled] [Disabled]  
4.4.4  
Chipset  
The Chipset menu allows you to change the advanced chipset settings. Select an  
item then press <Enter> to display the sub-menu.  
Advanced Chipset Settings  
Configure North Bridge  
features.  
WARMING: Setting wrong values in below sections  
may cause system to malfunction.  
North Bridge Configuration  
North Bridge Chipset Configuration  
BIOS SETUP UTILITY  
Advanced  
North Bridge Chipset Configuration  
Options  
Memory Remap Feature  
Initiate Graphic Adapter  
PEG Port Control  
[Enabled]  
[PEG/PCI]  
[Auto]  
Disabled  
Enabled  
PEG Port Force x1  
[Disabled]  
ASUS C.G.I. Function  
[Auto]  
Memory Remap Feature [Enabled]  
Allows you to enable or disable the remapping of the overlapped PCI memory  
above the total physical memory. Enable this option only when you install 64-  
bit operating system. Configuration options: [Disabled] [Enabled]  
Initiate Graphic Adapter [PEG/PCI]  
Allows you to decide which graphics controller to use as the primary boot  
device. Configuration options: [PCI/PEG] [PEG/PCI]  
PEG Port Control [Auto]  
Configuration options: [Auto] [Disabled]  
The following item appears only when you set PEG Port Control to [Auto]  
4-23  
ASUS P5K/EPU  
PEG Port Force x1 [Disabled]  
Configuration options: [Enabled] [Disabled]  
ASUS C.G.I. Function [Auto]  
Allows you to configure ASUS Cross Graphics Impeller.  
Configuration options: [Auto] [Enabled] [Disabled]  
4.4.5  
OnBoard Devices Configuration  
BIOS SETUP UTILITY  
Advanced  
Onboard Device Configuration  
Enable or Disable  
High Definition Audio  
Controller  
High Definition Audio  
Front Panel Type  
[Enabled]  
[HD Audio]  
[Enabled]  
[Enabled]  
[Enabled]  
[Disabled]  
Onboard 1394 Controller  
Marvell IDE Controller  
Marvell GbE LAN  
LAN Boot ROM  
Serial Port1 Address  
[3F8/IRQ4]  
Select Screen  
Select Item  
Change Option  
General Help  
Save and Exit  
Exit  
+-  
F1  
F10  
ESC  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
High Definition Audio [Enabled]  
Allows you to enable or disable the High Definition Audio Controller.  
Configuration options: [Enabled] [Disabled]  
Front Panel Support Type [HD Audio]  
Allows you to set the front panel audio connector (AAFP) mode to legacy  
AC’97 or high-definition audio depending on the audio standard that the front  
panel audio module supports. Configuration options: [AC97] [HD Audio]  
Onboard 1394 Controller [Enabled]  
Allows you to disable or enable the onboard 1394 device support.  
Configuration options: [Enabled] [Disabled]  
Marvell IDE Controller [Enabled]  
Allows you to disable or enable the Marvell IDE device support.  
Configuration options: [Enabled] [Disabled]  
MarvelI GbE LAN [Enabled]  
Configuration options: [Enabled] [Disabled]  
LAN Boot ROM [Disabled]  
Configuration options: [Disabled] [Enabled]  
4-24  
Chapter 4: BIOS setup  
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]  
4.4.6  
PCIPnP  
The PCIPnP menu items allow you to change the advanced settings for PCI/PnP  
devices.  
Take caution when changing the settings of the PCIPnP menu items. Incorrect  
field values can cause the system to malfunction.  
BIOS SETUP UTILITY  
Advanced  
Advanced PCI/PnP Settings  
NO: lets the BIOS  
configure all the  
devices in the system.  
WARNING: Setting wrong values in below sections  
may cause system to malfunction.  
YES: lets the operating  
system configure Plug  
and Play (PnP) devices  
not required for boot  
if your system has a  
Plug and Play operating  
system.  
Plug And Play O/S  
[NO]  
Select Screen  
Select Item  
Change Option  
+-  
F10  
ESC  
F1  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
Plug And Play O/S [NO]  
When set to [NO], BIOS configures all the devices in the system. 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.  
Configuration options: [NO] [YES]  
4-25  
ASUS P5K/EPU  
4.5  
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  
Advanced  
Power  
Boot  
Tools  
Exit  
Select the ACPI state  
used for System  
Suspend.  
Suspend Mode  
[Auto]  
Repost Video on S3 Resume  
ACPI Version  
[Disabled]  
[Disabled]  
[Enabled]  
ACPI APIC Support  
APM Configuration  
Hardware Monitor  
Select Screen  
Select Item  
Change Option  
+-  
F10  
ESC  
F1  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
4.5.1  
Suspend Mode [Auto]  
Allows you to select the Advanced Configuration and Power Interface (ACPI) state  
to be used for system suspend.  
Configuration options: [S1 (POS) only] [S3 only] [Auto]  
4.5.2  
Repost Video on S3 Resume [Disabled]  
Determines whether to invoke VGA BIOS POST on S3/STR resume.  
Configuration options: [Disabled] [Enabled]  
4.5.3  
ACPI Version [Disabled]  
Add additional tables as per ACPI 2.0 specifications.  
Configuration options: [Disabled] [Enabled]  
4.5.4  
ACPI APIC Support [Enabled]  
Allows you to enable or disable the Advanced Configuration and Power Interface  
(ACPI) support in the Advanced Programmable Interrupt Controller (APIC). When  
set to [Enabled], the ACPI APIC table pointer is included in the RSDT pointer list.  
Configuration options: [Disabled] [Enabled]  
4-26  
Chapter 4: BIOS setup  
4.5.5  
APM Configuration  
BIOS SETUP UTILITY  
Power  
APM Configuration  
<Enter> to select  
whether or not to  
restart the system  
after AC power loss.  
Restore on AC Power Loss  
Power On By RTC Alarm  
Power On By External Modems  
Power On By PCI Devices  
Power On By PCIE Devices  
Power On By PS/2 Keyboard  
Power On By PS/2 Mouse  
[Power Off]  
[Disabled]  
[Disabled]  
[Disabled]  
[Disabled]  
[Disabled]  
[Disabled]  
Select Screen  
Select Item  
Change Option  
+-  
F10  
ESC  
F1  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
Restore On AC Power Loss [Power Off]  
When set to [Power Off], the system goes into off state after an AC power loss.  
When set to [Power On], the system goes on after an AC power loss. When set to  
[Last State], the system goes into either off or on state, whatever the system state  
was before the AC power loss.  
Configuration options: [Power Off] [Power On] [Last State]  
Power On By RTC Alarm [Disabled]  
Allows you to enable or disable RTC to generate a wake event. When this item  
is set to [Enabled], the items RTC Alarm Date/ RTC Alarm Hour/ RTC Alarm  
Minute/ RTC Alarm Second will become user-configurable with set values.  
Configuration options: [Disabled] [Enabled]  
Power On By External Modems [Disabled]  
This allows either settings of [Enabled] or [Disabled] for powering up the computer  
when the external modem receives a call while the computer is in Soft-off mode.  
Configuration options: [Disabled] [Enabled]  
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]  
Allows you to enable or disable the PME to wake up from S5 by PCI devices.  
Configuration options: [Disabled] [Enabled]  
Power On By PCIE Devices [Disabled]  
Allows you to enable or disable the PCIE devices to generate a wake event.  
Configuration options: [Disabled] [Enabled]  
4-27  
ASUS P5K/EPU  
Power On By PS/2 Keyboard [Disabled]  
Allows you to disable the Power On by PS/2 keyboard function or set 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.  
Configuration options: [Disabled] [Space Bar] [Ctrl-Esc] [Power Key]  
Power On By PS/2 Mouse [Disabled]  
When set to [Enabled], this parameter allows you to use the PS/2 mouse to turn on  
the system. This feature requires an ATX power supply that provides at least 1A on  
the +5VSB lead. Configuration options: [Disabled] [Enabled]  
4.5.6  
Hardware Monitor  
BIOS SETUP UTILITY  
Power  
Hardware Monitor  
CPU Temperature  
CPU Temperature  
MB Temperature  
[51ºC/123.5ºF]  
[41ºC/105.5ºF]  
CPU Fan Speed  
[1962RPM]  
[Disabled]  
[N/A]  
CPU Q-Fan Control  
Chassis Fan 1 Speed  
Chassis Fan 2 Speed  
Chassis Q-Fan Control  
Power Fan Speed  
[N/A]  
[Disabled]  
[N/A]  
Select Screen  
VCORE Voltage  
3.3V Voltage  
[ 1.288V]  
[ 3.296V]  
[ 5.094V]  
[11.616V]  
Select Item  
Change Field  
+-  
F10  
ESC  
5V  
Voltage  
Voltage  
F1  
General Help  
12V  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
CPU Temperature [xxxºC/xxxºF]  
MB Temperature [xxxºC/xxxºF]  
The onboard hardware monitor automatically detects and displays the motherboard  
and CPU temperatures. Select [Ignored] if you do not wish to display the detected  
temperatures.  
CPU / Power Fan Speed [xxxxRPM] or [Ignored] / [N/A]  
The onboard hardware monitor automatically detects and displays the CPU /  
Power fan speed in rotations per minute (RPM). If the fan is not connected to the  
motherboard, the field shows [N/A].  
CPU Q-Fan Control [Disabled]  
Allows you to enable or disable the CPU Q-fan.  
Configuration options: [Disabled] [Enabled]  
The following item appears only when you enable CPU Q-Fan Control.  
4-28  
Chapter 4: BIOS setup  
CPU Fan Profile [Optimal]  
Allows you to set the appropriate performance level of the ASUS Q-Fan. When  
set to [Optimal], the CPU fan automatically adjusts depending on the CPU  
temperature. Set this item to [Silent Mode] to minimize fan speed for quiet CPU  
fan operation, or [Performance Mode] to achieve maximum CPU fan speed.  
Configuration options: [Optimal] [Silent Mode] [Performance Mode]  
Chassis Fan 1/2 Speed [xxxxRPM] or [Ignored] / [N/A]  
The onboard hardware monitor automatically detects and displays the chassis  
fan speed in rotations per minute (RPM). If the fan is not connected to the  
motherboard, the field shows [N/A].  
Chassis Q-Fan Control [Disabled]  
Allows you to enable or disable the Chassis Q-fan.  
Configuration options: [Disabled] [Enabled]  
The following items appear only when you enable Chassis Q-Fan Control.  
Chassis Fan Ratio [Auto]  
Allows you to select a fan speed ratio in the low CPU temperature.  
Configuration options [Auto] [90%] [80%] [70%] [60%]  
A very low fan speed ratio may cause fan speed drop and trigger the hardware  
monitor warning message.  
Chassis Target Temperature [37°C]  
CPU fan speed will auto-adjust to reach this target temperature.  
Configuration options: [28°C] [31°C] [34°C] [37°C] [40°C] [43°C] [46°C]  
VCORE 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.  
4-29  
ASUS P5K/EPU  
4.6  
Boot menu  
The Boot menu items allow you to change the system boot options. Select an item  
then press <Enter> to display the sub-menu.  
BIOS SETUP UTILITY  
Main  
Advanced  
Power  
Boot  
Tools  
Exit  
Specifies the Boot  
Device Boot Priority  
sequence.  
Boot Device Priority  
A virtual floppy disk  
drive (Floppy Drive B:  
) may appear when you  
set the DVD-ROM drive  
as the first boot  
Boot Settings Configuration  
Security  
device.  
Select Screen  
Select Item  
Enter Go to Sub Screen  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
4.6.1  
Boot Device Priority  
BIOS SETUP UTILITY  
Boot  
Boot Device Priority  
Specifies the boot  
sequence from the  
availabe devices.  
1st Boot Device  
2nd Boot Device  
3rd Boot Device  
[1st FLOPPY DRIVE]  
[IDE:HDS728080PLAT2]  
[ATAPI CD-ROM]  
A device enclosed  
in parenthesis has  
been disabled in the  
corresponding menu.  
Select Screen  
Select Item  
Change Option  
+-  
F10  
ESC  
F1  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
1st ~ xxth Boot Device [xxx Drive]  
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: [1st FLOPPY DRIVE]  
[Hard Drive] [ATAPI CD-ROM] [Disabled]  
4-30  
Chapter 4: BIOS setup  
4.6.2  
Boot Settings Configuration  
BIOS SETUP UTILITY  
Boot  
Boot Settings Configuration  
Allows BIOS to skip  
certain tests while  
booting. This will  
decrease the time needed  
to boot the system.  
Quick Boot  
Full Screen Logo  
AddOn ROM Display Mode  
Bootup Num-Lock  
PS/2 Mouse Support  
Wait for ‘F1’ if Error  
Hit ‘DEL’ Message Display  
Interrupt 19 Capture  
[Enabled]  
[Enabled]  
[Force BIOS]  
[On]  
[Auto]  
[Enabled]  
[Enabled]  
[Disabled]  
Quick Boot [Enabled]  
Enabling this item allows the BIOS to skip some power on self tests (POST) while  
booting to decrease the time needed to boot the system. When set to [Disabled],  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
BIOS performs all the POST items. Configuration options: [Disabled] [Enabled]  
Full Screen Logo [Enabled]  
This allows you to enable or disable the full screen logo display feature.  
Configuration options: [Disabled] [Enabled]  
Set this item to [Enabled] to use the ASUS MyLogo3™ feature.  
AddOn ROM Display Mode [Force BIOS]  
Sets the display mode for option ROM.  
Configuration options: [Force BIOS] [Keep Current]  
Bootup Num-Lock [On]  
Allows you to select the power-on state for the NumLock.  
Configuration options: [Off] [On]  
PS/2 Mouse Support [Auto]  
Allows you to enable or disable support for PS/2 mouse.  
Configuration options: [Auto] [Disabled] [Enabled]  
Wait for ‘F1’ If Error [Enabled]  
When set to [Enabled], the system waits for the <F1> key to be pressed when error  
occurs. Configuration options: [Disabled] [Enabled]  
Hit ‘DEL’ Message Display [Enabled]  
When set to [Enabled], the system displays the message “Press DEL to run Setup”  
during POST. Configuration options: [Disabled] [Enabled]  
Interrupt 19 Capture [Disabled]  
When set to [Enabled], this function allows the option ROMs to trap Interrupt 19.  
Configuration options: [Disabled] [Enabled]  
4-31  
ASUS P5K/EPU  
4.6.3  
Security  
The Security menu items allow you to change the system security settings. Select  
an item then press <Enter> to display the configuration options.  
BIOS SETUP UTILITY  
Boot  
Security Settings  
<Enter> to change  
password.  
<Enter> again to  
disabled password.  
Supervisor Password  
User Password  
: Not Installed  
: Not Installed  
Change Supervisor Password  
Change User Password  
Select Screen  
Select Item  
Enter Change  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
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 2.6 Jumper for information on how to  
erase the RTC RAM.  
After you have set a supervisor password, the other items appear to allow you to  
change other security settings.  
4-32  
Chapter 4: BIOS setup  
BIOS SETUP UTILITY  
Boot  
Security Settings  
<Enter> to change  
password.  
<Enter> again to  
disabled password.  
Supervisor Password  
User Password  
: Installed  
: Installed  
Change Supervisor Password  
User Access Level  
Change User Password  
Clear User Password  
Password Check  
[Full Access]  
[Setup]  
Select Screen  
Select Item  
Enter Change  
F1  
F10  
ESC  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
User Access Level [Full Access]  
This item allows you to select the access restriction to the Setup items.  
Configuration options: [No Access] [View Only] [Limited] [Full Access]  
[No Access] prevents user access to the Setup utility.  
[View Only] allows access but does not allow change to any field.  
[Limited] allows changes only to selected fields, such as Date and Time.  
[Full Access] allows viewing and changing all the fields in the Setup utility.  
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]  
When set to [Setup], BIOS checks for user password when accessing the Setup  
utility. When set to [Always], BIOS checks for user password both when accessing  
Setup and booting the system. Configuration options: [Setup] [Always]  
4-33  
ASUS P5K/EPU  
4.7  
Tools menu  
The Tools menu items allow you to configure options for special functions. Select  
an item then press <Enter> to display the sub-menu.  
BIOS SETUP UTILITY  
Main  
Advanced  
Power  
Boot  
Tools  
Exit  
Press ENTER to run  
the utility to select  
and update BIOS.  
This utility doesn't  
support :  
ASUS EZ Flash 2  
ASUS O.C. Profile  
ASUS Ai Net 2  
1.NTFS format  
Select Screen  
Select Item  
Change Field  
+-  
F1  
F10  
ESC  
Enter Go to Sub Screen  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
4.7.1  
ASUS EZ Flash 2  
Allows you to run ASUS EZ Flash 2. When you press <Enter>, a confirmation  
message appears. Use the left/right arrow key to select between [Yes] or [No],  
then press <Enter> to confirm your choice. Refer to section 4.1.2 for details.  
ASUSTek EZ Flash 2 BIOS ROM Utility V3.06  
FLASH TYPE: WINBOND W25X80  
Current ROM  
BOARD: P5KEPU  
VER: 0004  
Update ROM  
BOARD: Unknown  
VER: Unknown  
DATE: 09/13/07  
DATE: Unknown  
PATH: A:\  
A:  
Note  
[Enter] Select or Load  
[B] Backup  
[ESC] Exit  
[Tab] Switch  
[Up/Down/Home/End] Move  
4-34  
Chapter 4: BIOS setup  
4.7.2  
ASUS Ai Net 2  
BIOS SETUP UTILITY  
Tools  
Check LAN cable during  
POST.  
Pair Status Length  
1-2  
3-6  
4-5  
7-8  
N/A  
N/A  
N/A  
N/A  
Marvell POST Check LAN cable  
[Disabled]  
v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.  
Marvell POST Check LAN Cable [Disabled]  
Enables or disables checking of the Marvell LAN cable during the Power-On  
Self-Test (POST). Configuration options: [Disabled] [Enabled]  
4-35  
ASUS P5K/EPU  
4.8  
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  
Advanced  
Power  
Boot  
Tools  
Exit  
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  
Tab  
F1  
F10  
ESC  
Select Field  
General Help  
Save and Exit  
Exit  
v02.61 (C)Copyright 1985-2007, 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.  
4-36  
Chapter 4: BIOS setup  
This chapter describes the contents of  
the support DVD that comes with the  
motherboard package and the softwares.  
Software  
5
support  
Chapter summary  
5
5.1  
5.2  
5.3  
Installing an operating system ................................................... 5-1  
Support DVD information............................................................ 5-1  
Software information ................................................................... 5-8  
ASUS P5K/EPU  
5.1  
Installing an operating system  
This motherboard supports Windows® XP/ 64-bit XP/ Vista™ 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.  
Make sure that you install the Windows® XP Service Pack 2 or later  
versions before installing the drivers for better compatibility and system  
stability.  
5.2  
Support DVD information  
The support DVD that came with the motherboard package contains the drivers,  
software applications, and utilities that you can install to avail all motherboard  
features.  
The contents of the support DVD are subject to change at any time without  
notice. Visit the ASUS website (www.asus.com) for updates.  
5.2.1  
Running the support DVD  
Place the support DVD to the optical drive. The DVD automatically displays the  
Drivers menu if Autorun is enabled in your computer.  
Click an icon to  
display support DVD/  
motherboard information  
Click an item to install  
If Autorun is NOT enabled in your computer, browse the contents of the support  
DVD to locate the file ASSETUP.EXE from the BIN folder. Double-click the  
ASSETUP.EXE to run the DVD.  
5-1  
ASUS P5K/EPU  
5.2.2  
Drivers menu  
The Drivers menu shows the available device drivers if the system detects installed  
devices. Install the necessary drivers to activate the devices.  
ASUS InstAll-Drivers Installation Wizard  
Installs all of the drivers through the Installation Wizard.  
Intel Chipset Inf Update Program  
Installs the Intel® chipset Inf update program.  
Realtek Audio Driver  
Installs the Realtek® ALC883 audio driver and application.  
Marvell Yukon Gigabit Ethernet Driver  
Installs the Marvell Yukon Gigabit Ethernet driver.  
ASUS EPU + AI Gear 3 Driver  
Installs the EPU + AI Gear 3 driver.  
Install this driver before the ASUS AI Suite utility.  
USB 2.0 Driver  
Installs the USB 2.0 driver.  
5-2  
Chapter 5: Software support  
5.2.3  
Utilities menu  
The Utilities menu shows the applications and other software that the motherboard  
supports.  
Click to display  
the next page  
Click to return  
to the previous  
page  
ASUS InstAll-Installation Wizard for Utilities  
Installs all of the utilities through the Installation Wizard.  
Marvell Yukon VCT Application  
Installs the Marvell® Yukon Virtual Cable Tester™ (VCT) application that diagnoses  
and reports LAN cable faults and shorts using the Time Domain Reflectometry  
(TDR) technology.  
5-3  
ASUS P5K/EPU  
ASUS Update  
The ASUS Update utility allows you to update the motherboard BIOS in Windows®  
environment. This utility requires an Internet connection either through a network  
or an Internet Service Provider (ISP).  
ASUS PC Probe II  
This smart utility monitors the fan speed, CPU temperature, and system voltages,  
and alerts you of any detected problems. This utility helps you keep your computer  
in healthy operating condition.  
ASUS AI Suite  
Installs the ASUS AI Suite.  
ASUS AI Direct Link  
Installs the ASUS AI Direct Link application  
Adobe Acrobat Reader V7.0  
Installs the Adobe® Acrobat® Reader that allows you to open, view, and print  
documents in Portable Document Format (PDF).  
Microsoft DirectX 9.0c  
Installs the Microsoft® DirectX 9.0c driver. The Microsoft DirectX® 9.0c is a  
multimedia technology that enhances computer graphics and sound. DirectX®  
improves the multimedia features of you computer so you can enjoy watching  
TV and movies, capturing videos, or playing games in your computer. Visit the  
Microsoft website (www.microsoft.com) for updates.  
Anti-Virus Utility  
The anti-virus application scans, identifies, and removes computer viruses. View  
the online help for detailed information.  
InterVideo MediaOne Gallery  
Installs the media library and all-in-one software.  
WinDVD Copy5 Trial  
Installs the WinDVD Copy5 trial version.  
Ulead PhotoImpact 12 SE  
Installs the PhotoImpact image editing software.  
CyberLink PowerBackup  
Installs CyberLink PowerBackup to back up and restore your data easily.  
Corel Snapfire Plus SE  
Installs Corel Snapfire Plus SE.  
5-4  
Chapter 5: Software support  
5.2.5  
Manual menu  
The Manual menu contains a list of supplementary user manuals. Click an item to  
open the folder of the user manual.  
Most user manual files are in Portable Document Format (PDF). Install the Adobe®  
Acrobat® Reader from the Utilities menu before opening a user manual file.  
5.2.6  
ASUS Contact information  
Click the Contact tab to display the ASUS contact information. You can also find  
this information on the inside front cover of this user guide.  
5-5  
ASUS P5K/EPU  
5.2.7  
Other information  
The icons on the top right corner of the screen give additional information on the  
motherboard and the contents of the support DVD. Click an icon to display the  
specified information.  
Motherboard Info  
Displays the general specifications of the motherboard.  
Browse this DVD  
Displays the support DVD contents in graphical format.  
5-6  
Chapter 5: Software support  
Technical support Form  
Displays the ASUS Technical Support Request Form that you have to fill out when  
requesting technical support.  
Filelist  
Displays the contents of the support DVD in text format.  
P5K/EPU  
5-7  
ASUS P5K/EPU  
5.3  
Software information  
Most of the applications in the support DVD have wizards that will conveniently  
guide you through the installation. View the online help or readme file that came  
with the software application for more information.  
5.3.1  
ASUS MyLogo3™  
The ASUS MyLogo3™ utility lets you customize the boot logo. The boot logo is the  
image that appears on screen during the Power-On-Self-Tests (POST). The ASUS  
MyLogo3™ is automatically installed when you install the ASUS Update utility from  
the support DVD. See section 5.2.3 Utilities menu for details.  
Before using the ASUS MyLogo3™, use the AFUDOS utility to make a copy  
of your original BIOS file, or obtain the latest BIOS version from the ASUS  
website. See section 4.1.3 AFUDOS utility.  
Make sure that the BIOS item Full Screen Logo is set to [Enabled] if  
you wish to use ASUS MyLogo3. See section 4.6.2 Boot Settings  
Configuration.  
You can create your own boot logo image in GIF, JPG, or BMP file formats.  
To launch the ASUS MyLogo3™:  
1.  
Launch the ASUS Update utility. Refer to section 4.1.1 ASUS Update utility  
for details.  
2.  
3.  
Select Options from the drop down menu, then click Next.  
Check the option Launch MyLogo to replace system boot logo before  
flashing BIOS, then click Next.  
4.  
Select Update BIOS from a file from the drop down menu, then click Next.  
5.  
When prompted, locate the new BIOS file, then click Next. The ASUS  
MyLogo3 window appears.  
6.  
From the left window pane, select  
the folder that contains the image  
you intend to use as your boot logo.  
5-8  
Chapter 5: Software support  
7.  
When the logo images appear on the  
right window pane, select an image to  
enlarge by clicking on it.  
8.  
Adjust the boot image to your desired  
size by selecting a value on the Ratio  
box.  
9.  
When the screen returns to the ASUS Update utility, flash the original BIOS to  
load the new boot logo.  
10. After flashing the BIOS, restart the computer to display the new boot logo  
during POST.  
ASUS P5K/EPU  
5-9  
5.3.2  
AI NET2  
The AI NET2 features the Marvell® Virtual Cable Tester™ (VCT). VCT is a cable  
diagnostic utility that reports LAN cable faults and shorts using the Time Domain  
Reflectometry (TDR) technology. The VCT detects and reports open and shorted  
cables, impedance mismatches, pair swaps, pair polarity problems, and pair skew  
problems of up to 64 ns at one meter accuracy.  
The VCT feature reduces networking and support costs through a highly  
manageable and controlled network system. This utility can be incorporated in  
the network systems software for ideal field support as well as development  
diagnostics.  
Using the Virtual Cable Tester™  
To use the the Marvell® Virtual Cable Tester™ utility:  
1.  
2.  
Launch the VCT utility from the Windows® desktop by clicking Start > All  
Programs > Marvell > Virtual Cable Tester.  
Click Virtual Cable Tester from the menu to display the screen below.  
3.  
Click the Run button to perform a cable test.  
The VCT utility only tests Ethernet cables connected to Gigabit LAN port(s).  
The Run button on the Virtual Cable Tester™ main window is disabled if no  
problem is detected on the LAN cable(s) connected to the LAN port(s).  
If you want the system to check the status of the LAN cable before entering  
the OS, enable the item Post Check LAN Cable in the BIOS Setup.  
5-10  
Chapter 5: Software support  
5.3.3  
ASUS PC Probe II  
PC Probe II is a utility that monitors the computer’s vital components, and detects  
and alerts you of any problem with these components. PC Probe II senses fan  
rotations, CPU temperature, and system voltages, among others. Because PC  
Probe II is software-based, you can start monitoring your computer the moment  
you turn it on. With this utility, you are assured that your computer is always at a  
healthy operating condition.  
Installing PC Probe II  
To install PC Probe II on your computer:  
1.  
Place the support DVD to the optical drive. The Drivers installation tab  
appears if your computer has an enabled Autorun feature.  
If Autorun is not enabled in your computer, browse the contents of the support  
DVD to locate the setup.exe file from the ASUS PC Probe II folder. Double-click  
the setup.exe file to start installation.  
2.  
3.  
Click the Utilities tab, then click ASUS PC Probe II.  
Follow the screen instructions to complete installation.  
Launching PC Probe II  
You can launch the PC Probe II right after installation or anytime from the  
Windows® desktop.  
To launch the PC Probe II from the Windows® desktop, click Start > All Programs  
> ASUS > PC Probe II > PC Probe II v1.xx.xx. The PC Probe II main window  
appears.  
After launching the application, the PC Probe II icon appears in the Windows®  
taskbar. Click this icon to close or restore the application.  
Using PC Probe II  
Main window  
The PC Probe II main window  
allows you to view the current  
status of your system and change  
the utility configuration. By default,  
the main window displays the  
Preference section. You can close  
or restore the Preference section  
by clicking on the triangle on the  
main window right handle.  
Click to close the  
Preference panel  
ASUS P5K/EPU  
5-11  
Button  
F
u
n
c
t
i
o
n
Button  
Functioin  
Opens the Configuration window  
Opens the Report window  
Opens the Desktop Management Interface window  
Opens the Peripheral Component Interconnect window  
Opens the Windows Management Instrumentation window  
Opens the hard disk drive, memory, CPU usage window  
Shows/Hides the Preference section  
Minimizes the application  
Closes the application  
Sensor alert  
When a system sensor detects a problem, the main window right handle  
turns red, as the illustrations below show.  
When displayed, the monitor panel for that sensor also turns red. Refer to the  
Monitor panels section for details.  
Preferences  
You can customize the application using the  
Preference section in the main window. Click  
the box before each preference to activate or  
deactivate.  
5-12  
Chapter 5: Software support  
Hardware monitor panels  
The hardware monitor panels display the current value of a system sensor such as  
fan rotation, CPU temperature, and voltages.  
The hardware monitor panels come in two display modes: hexagonal (large) and  
rectangular (small). When you check the Enable Monitoring Panel option from the  
Preference section, the monitor panels appear on your computer’s desktop.  
Small display  
Large display  
Changing the monitor panels position  
To change the position of the monitor panels in the desktop,  
click the arrow down button of the Scheme options, then select  
another position from the list box. Click OK when finished.  
Moving the monitor panels  
All monitor panels move together using a magnetic effect. If  
you want to detach a monitor panel from  
the group, click the horseshoe magnet  
icon. You can now move or reposition the  
panel independently.  
Adjusting the sensor threshold value  
You can adjust the sensor threshold  
value in the monitor panel by  
Click to  
clicking the or buttons. You can  
increase  
also adjust the threshold values  
value  
using the Config window.  
Click to  
decrease  
value  
You cannot adjust the sensor  
threshold values in a small  
monitoring panel.  
ASUS P5K/EPU  
5-13  
Monitoring sensor alert  
The monitor panel turns red when a component value exceeds or is lower  
than the threshold value. Refer to the illustrations below.  
Small display  
Large display  
WMI browser  
Click to display the  
WMI (Windows Management  
Instrumentation) browser. This  
browser displays various Windows®  
management information. Click an  
item from the left panel to display on  
the right panel. Click the plus sign (+)  
before WMI Information to display the  
available information.  
You can enlarge or reduce the browser size by dragging the bottom right corner  
of the browser.  
DMI browser  
Click to display the DMI  
(Desktop Management Interface)  
browser. This browser displays various  
desktop and system information.  
Click the plus sign (+) before DMI  
Information to display the available  
information.  
5-14  
Chapter 5: Software support  
PCI browser  
Click  
to display the PCI  
(Peripheral Component Interconnect)  
browser. This browser provides  
information on the PCI devices installed  
on your system. Click the plus sign  
(+) before the PCI Information item to  
display available information.  
Usage  
The Usage browser displays real-time information on the CPU, hard disk drive  
space, and memory usage. Click  
to display the Usage browser.  
CPU usage  
The CPU tab displays real-  
time CPU usage in line graph  
representation. If the CPU has  
an enabled Hyper-Threading,  
two separate line graphs display  
the operation of the two logical  
processors.  
Hard disk drive space usage  
The Hard Disk tab displays the  
used and available hard disk  
drive space. The left panel of the  
tab lists all logical drives. Click  
a hard disk drive to display the  
information on the right panel.  
The pie chart at the bottom of the  
window represents the used (blue)  
and the available HDD space.  
ASUS P5K/EPU  
5-15  
Memory usage  
The Memory tab shows both  
used and available physical  
memory. The pie chart at the  
bottom of the window represents  
the used (blue) and the available  
physical memory.  
Configuring PC Probe II  
Click  
to view and adjust the sensor threshold values.  
The Config window has two tabs: Sensor/Threshold and Preference. The Sensor/  
Threshold tab enables you to activate the sensors or to adjust the sensor threshold  
values. The Preference tab allows you to customize sensor alerts, or change the  
temperature scale.  
Loads the default  
Loads your saved  
configuration  
threshold values for  
each sensor  
Cancels or  
ignores your  
changes  
Applies your  
changes  
Saves your  
configuration  
5-16  
Chapter 5: Software support  
5.3.4  
ASUS AI Suite  
ASUS AI Suite allows you to launch AI Gear 3+, AI Booster, AI Nap, and Q-Fan 2  
utilities easily.  
Install the ASUS EPU + AI Gear 3 Driver before the ASUS AI Suite utility.  
Otherwise, the ASUS AI Suite will not function properly.  
Installing AI Suite  
To install AI Suite on your computer:  
1.  
Place the support DVD to the optical drive. The Drivers installation tab  
appears if your computer has an enabled Autorun feature.  
2.  
3.  
Click the Utilities tab, then click AI Suite.  
Follow the screen instructions to complete installation.  
Launching AI Suite  
You can launch AI Suite right after installation or anytime from the Windows®  
desktop.  
To launch AI Suite from the Windows® desktop, click Start > All Programs >  
ASUS > AI Suite > AI Suite v1.xx.xx. The AI Suite main window appears.  
After launching the application, the AI Suite icon appears in the Windows® taskbar.  
Click this icon to close or restore the application.  
Using AI Suite  
Click the AI Gear 3, AI Nap, AI Booster, or Q-Fan 2 icon to launch the utility, or click  
the Normal icon to restore the system to normal state.  
Press to restore to normal  
Press to launch AI Nap  
Press to launch AI Gear 3+  
Press to launch Q-Fan 2  
Press to launch AI Booster  
5-17  
ASUS P5K/EPU  
Other feature buttons  
Click on right corner of the main window to open the monitor window.  
Displays the CPU/  
system temperature,  
CPU/memory/PCIE  
voltage, and CPU/  
chassis fan speed  
Displays the FSB/CPU  
frequency  
Click  
on right corner of the expanded window to switch the temperature from  
degrees Centigrade to degrees Fahrenheit.  
5-18  
Chapter 5: Software support  
5.3.5  
ASUS EPU Utility—AI Gear 3+  
ASUS AI Gear 3+ is a utility designed to configure and support all ASUS EPU  
(Energy Processing Unit) features. This easy-to-use utility provides four system  
performance profiles that adjusts the processor frequency and vCore voltage for  
different computing needs.  
After installing ASUS AI Suite from the bundled support DVD, you can launch  
ASUS AI Gear 3+ by double-clicking the AI Suite icon on your Windows OS taskbar  
and then click the AI Gear 3+ button on the AI Suite main window.  
Here are some simple ways to use AI Gear 3+:  
Click the four gear mode buttons below, including Turbo, High Performance,  
Medium Power Saving, and Max. Power Saving, or shift the gear to the  
performance setting that you like.  
Click Calibration first, and switch to Auto mode to have AI Gear 3+  
automatically adjust the system performance according to the CPU loading.  
Under Auto mode, click Settings to set the time for the system to enter AI  
Nap mode.  
Click Energy Saving to show the total amount of electricity this ASUS EPU-  
featured motherboard saved.  
Calibration  
Settings  
Auto Mode  
Energy Saving  
Turbo Mode  
High Performance Mode  
Medium Power Saving Mode  
Max. Power Saving Mode  
5-19  
ASUS P5K/EPU  
Energy Saving Status  
Displays the  
current CPU  
D i s p l a y s t h e  
a m o u n t o f  
electricity saved  
since the system  
started up  
Displays the  
time/date the  
calculator starts  
counting  
Click to switch to  
the “Total Electricity  
Savings” window  
Click to switch to the  
“Electricity Savings  
Calculator” window  
Displays the amount  
of CO2 that has been  
reduced  
Click  
to open the Electricity Savings Calculator window. You may reset the  
time for the calculator to start counting.  
Click to reset  
t h e t i m e t h e  
calculator starts  
Displays the electricity saved since the time  
was reset  
5-20  
Chapter 5: Software support  
5.3.6  
ASUS AI Nap  
This feature allows you to minimize the power consumption of your computer  
whenever you are away. Enable this feature for minimum power consumption and  
a more quiet system operation.  
After installing AI Suite from the bundled support DVD, you can launch the utility by  
double-clicking the AI Suite icon on the Windows OS taskbar and click the AI Nap  
button on the AI Suite main window.  
Click Yes on the confirmation screen.  
To exit AI Nap mode, press the system power or mouse button then click Yes on  
the confirmation screen.  
To switch the power button functions from AI Nap to shutting down, just right  
click the AI Suite icon on the OS taskbar, select AI Nap and click Use power  
button. Unclick the the item to switch the function back.  
5-21  
ASUS P5K/EPU  
5.3.7  
ASUS Q-Fan 2  
This ASUS Q-Fan 2 Control feature allows you to set the appropriate performance  
level of the CPU Q-Fan 2 or the Chassis Q-Fan 2 for more efficient system  
operation. After enabling the Q-Fan 2 function, the fans can be set to automatically  
adjust depending on the temperature, to decrease fan speed, or to achieve the  
maximum fan speed.  
After installing AI Suite from the bundled support DVD, you can launch the utility by  
double-clicking the AI Suite icon on the Windows® OS taskbar and click the Q-Fan  
2 button on the AI Suite main window.  
Click the drop-down menu button  
and display the fan names. Select  
CPU Q-Fan 2 or CHASSIS Q-Fan 2.  
Click the box of Enabled to activate  
this function.  
drop-down list button  
Enabled box  
Profile list appears after clicking  
the Enabled box. Click the drop-  
down list button and select a profile.  
Optimal mode makes the fans  
adjust speed with the temperature;  
Silent mode minimizes fan  
speed for quiet fan operation;  
Performance mode boosts the fan  
to achieve maximal fan speed for  
the best cooling effect.  
click to display the  
drop-down list and  
select a Q-Fan 2 mode  
Click Apply at the bottom to save the setup.  
5-22  
Chapter 5: Software support  
5.3.8  
ASUS AI Booster  
The ASUS AI Booster application allows you to overclock the CPU speed in  
WIndows® environment without the hassle of booting the BIOS.  
After installing AI Suite from the bundled support DVD, you can launch the utility  
by double-clicking the AI Suite icon on the Windows® OS taskbar and click the AI  
Booster button on the AI Suite main window.  
The options on the taskbar allow you to use the default settings, adjust CPU/  
Memory/PCI-E frequency manually, or create and apply your personal overclocking  
configurations.  
5-23  
ASUS P5K/EPU  
5.3.9  
ASUS AI Direct Link  
ASUS AI Direct Link allows you to form a computer-to-computer network via a  
network cable to share files with high transfer rate. You must first connect two  
computers (at least one of them is ASUS product) using a network cable, and then  
install the utility to both computers to avail the AI Direct Link feature.  
Turn off your firewall software other than Windows Firewall before  
launching AI Direct Link.  
The transfer rate is limited if you use a 10/100 LAN card.  
Using AI Direct Link  
To enable the incoming folder:  
1.  
From the Windows® taskbar, right click on the AI Direct Link icon  
and  
select Incoming folder > Enable incoming folder.  
For Windows XP Home  
edition users, click Steps of  
enabling file sharing on this  
pop-up message and follow  
the instructions to enable the  
incoming folder.  
2.  
If you want to to verify the incoming  
user, select Use my account and  
set your username and password.  
Otherwise, select Use public  
account.  
For security’s sake, it is  
recommended that you set a  
username and password.  
3.  
Click OK and the “Ready for incoming” message  
appears.  
To disable the incoming folder, select Incoming  
folder > Disable incoming folder.  
5-24  
Chapter 5: Software support  
4.  
Right click on the AI Direct Link  
icon and select Incoming folder  
> Open incoming folder. The  
AIDirectLinkIncoming folder  
opens. Put the files you want  
to share into this folder. The  
authorized user has full access to  
this folder.  
The default path of the AIDirectLinkIncoming folder is C:\Program Files\ASUS\AI  
Direct Link. To change its location, disable the incoming folder first. Then, select  
Incoming folder > Change incoming folder to open the system directories,  
and move the AIDirectLinkIncoming folder under another directory.  
To connect to another computer:  
This function is valid for ASUS products only.  
1.  
From the Windows® taskbar, right  
click on the AI Direct Link icon and  
select Connect. The following screen  
displays.  
2.  
Click Refresh. The software starts  
searching for the connected computer.  
4.  
If necessary, enter the authorized  
username and password. Click OK  
to log in and have full access to  
this shared folder.  
3.  
The name of the computer found  
is listed. Click Open to open its  
shared folder.  
5-25  
ASUS P5K/EPU  
5-26  
Chapter 5: Software support  
This chapter tells how to install ATI®  
CrossFire™ graphics cards to avail of  
ATI’s Multi-Video Processing technology.  
ATI® CrossFire™  
6
technology support  
Chapter summary  
6
6.1  
6.2  
6.3  
Overview ....................................................................................... 6-1  
Installing CrossFire™ graphics cards ....................................... 6-2  
Software information ................................................................... 6-5  
ASUS P5K/EPU  
6.1  
Overview  
The motherboard supports the ATI® CrossFire™ technology that allows you to  
install multi-graphics processing units (GPU) graphics cards. Follow the installation  
procedures in this section.  
6.1.1  
Requirements  
CrossFire™ Edition graphics card (Master)  
CrossFire™-ready graphics card (Slave)  
CrossFire™-ready motherboard  
Make sure that your power supply unit (PSU) can provide at least the  
minimum power required by your system. See 8. ATX Power connectors on  
page 2-30 for details.  
Visit the ATI website or download the Radeon® X850 Crossfire™ Edition  
User’s Guide from the support DVD for detailed hardware requirements and  
installation procedures.  
The ATI CrossFire™ technology supports only the following operating  
systems:  
- Windows® XP 32-bit (Home or Professional) with Service  
Pack 2 (SP2)  
- Windows® XP Professional 64-bit Edition.  
Make sure that your graphics card driver supports the ATI® CrossFire™  
Technology. Download the latest driver from the ATI website (www.ati.com)  
The maximum resolution of Radeon™ X850 CrossFire™ Edition is 1600 x  
1200 at 65 MHz when you use DVI output.  
6.1.2  
Before you begin  
Uninstall other graphics card drivers in your system  
To uninstall other graphics card drivers:  
1.  
2.  
3.  
4.  
5.  
Close all current applications.  
Go to Control Panel > Add/Remove Programs.  
Select your current graphics card driver/s.  
Select Add/Remove.  
Restart your system.  
6-1  
ASUS P5K/EPU  
6.2  
Installing CrossFire™ graphics cards  
Before installing a CrossFire™ system, refer to the user guide that came with  
the ATI® CrossFire™ Edition graphics card.  
To install the graphics cards:  
1.  
Prepare one CrossFire™ Edition (Master) graphics card and one  
CrossFire™-ready (Slave) graphics card.  
Slave graphics card  
Master graphics card  
2.  
Insert the CrossFire™ Edition (Master) graphics card into the PCI Express  
x16 blue slot. Make sure that the card is properly seated on the slot.  
6-2  
Chapter 6: ATI® MVP technology support  
3.  
Insert the CrossFire™-ready (Slave) graphics card into the PCI Express x16  
black slot. Make sure that the card is properly seated on the slot.  
4.  
Connect an auxiliary power source from the power supply to the graphics  
cards.  
6-3  
ASUS P5K/EPU  
5.  
Connect one end of the external cable to the Master graphics card.  
6.  
7.  
Connect the other end of the external cable to the Slave graphics card.  
Connect the loose end to the corresponding port on your monitor.  
6
7
6-4  
Chapter 6: ATI® MVP technology support  
6.3  
Software information  
6.3.1  
Installing the device drivers  
Refer to the documentation that came with your graphics card package to install  
the device drivers.  
The ATI CrossFire™ technology supports only the following operating systems:  
Windows® XP 32-bit (Home or Professional) with Service  
Pack 2 (SP2)  
Windows® XP Professional 64-bit Edition.  
Windows® Vista 32/64 bit Edition. (Will be ready later. Visit the ATI  
website (www.ati.com)  
1.  
2.  
Turn on your system and log in  
with administrator rights.  
Windows® auto-detects the  
CrossFire™ graphics cards  
and displays the Found New  
Hardware Wizard window. Click  
Cancel.  
3.  
4.  
Place the CrossFire™ installation  
DVD in your optical drive and  
install drivers from the opening  
menu.  
Click Next to continue from the  
installation window that appears.  
5.  
Read the License Agreement,  
then click Yes.  
6-5  
ASUS P5K/EPU  
6.  
Select the components that you  
want to install, then click Next.  
Select Express to install the HydraVision™ multi-monitor and desktop  
management software, as well as the ATI driver.  
Select Custom to individually choose desired software components.  
Setup prepares the installation  
wizard that will guide you to setup  
process.  
Windows automatically configures  
the ATI Catalyst Control Center.  
The status windows indicates the  
progress of the installation.  
7.  
8.  
The Setup Complete window  
appears, indicating that the driver  
files have been copied to your  
computer.  
Click Yes to restart your computer  
now or No to restart later  
Click Finish.  
6-6  
Chapter 6: ATI® MVP technology support  
6.3.2  
Using the Catalyst™ Control Center  
The Catalyst™ Control Center allows you to access display features of the ATI  
hardware and software you installed. Use this application to adjust your graphic  
settings, enable/disable connected devices, and change your desktop orientation.  
Launching the Catalyst™ Control Center  
There are several ways to launch the Catalyst™ Control Center:  
On the Windows® task bar, click Start > ATI Catalyst™ Control Center >  
Catalyst™ Control Center  
Double-click the Catalyst™ Control Center desktop shortcut.  
On the Windows® task bar, double-  
click the Catalyst™ Control Center  
icon.  
6-7  
ASUS P5K/EPU  
The Catalyst™ Control Center Dialog Box  
View  
The Catalyst™ Control Center provides two views:  
Standard - simple view with wizards for beginners  
Advance - allows advanced users to access and configure the complete  
features of the software  
Set to Advance view to enable the CrossFire™ function.  
6-8  
Chapter 6: ATI® MVP technology support  
To enable CrossFire™:  
1. Set the view to Advance.  
2. Click the Crossfire™ item in Graphics Settings.  
3. In the CrossFire™ Settings dialog, tick the box opposite Enable  
CrossFire™.  
4. Click OK to effect the setting.  
3
2
4
Hotkeys  
Click the Hotkeys tab on the Catalyst™ Control Center to access the  
Hotkeys Manager, which allows you to create key combinations as shortcuts  
for performing certain functions quickly.  
6-9  
ASUS P5K/EPU  
Profiles  
Click the Profiles tab on the Catalyst™ Control Center to access the Profiles  
Manager, which allows you to create customized environments for your  
desktop, video, and 3D applications.  
Preferences  
Click the Preferences tab on the Catalyst™ Control Center to select a  
language, restore defaults, change skins, or enable/disable the System Tray  
icon.  
6-10  
Chapter 6: ATI® MVP technology support  
Help  
Click the Help tab on the Catalyst™ Control Center to access the online help  
system, generate a Problem Report, and get the Catalyst™ Control Center  
version information.  
6-11  
ASUS P5K/EPU  
6-12  
Chapter 6: ATI® MVP technology support  
The Appendix describes the CPU features  
and technologies that the motherboard  
supports.  
CPU features  
A
Chapter summary  
A
A.1  
A.2  
A.3  
Intel® EM64T..................................................................................A-1  
Enhanced Intel SpeedStep® Technology (EIST)........................A-1  
Intel® Hyper-Threading Technology ...........................................A-3  
ASUS P5K/EPU  
A.1  
Intel® EM64T  
The motherboard is fully compatible with Intel® LGA775 processors running  
on 32-bit operating systems.  
The motherboard comes with a BIOS file that supports EM64T. You can  
download the latest BIOS file from the ASUS website (www.asus.com/  
support/download/) if you need to update the BIOS file. See Chapter 4 for  
details.  
Visit www.intel.com for more information on the EM64T feature.  
Visit www.microsoft.com for more information on Windows® 64-bit OS.  
Using the Intel® EM64T feature  
To use the Intel® EM64T feature:  
1.  
2.  
Install an Intel® CPU that supports the Intel® EM64T.  
Install a 64-bit operating system (Windows® Vista 64-bit Edition or  
Windows® XP Professional x64 Edition).  
3.  
4.  
Install the 64-bit drivers for the motherboard components and devices from  
the support CD.  
Install the 64-bit drivers for expansion cards or add-on devices, if any.  
Refer to the expansion card or add-on device(s) documentation, or visit the  
related website, to verify if the card/device supports a 64-bit system.  
A.2  
Technology (EIST)  
Enhanced Intel SpeedStep®  
The motherboard comes with a BIOS file that supports EIST. You can  
download the latest BIOS file from the ASUS website (www.asus.com/  
support/download/) if you need to update the BIOS. See Chapter 4 for  
details.  
Visit www.intel.com for more information on the EIST feature.  
A.2.1  
System requirements  
Before using EIST, check your system if it meets the following requirements:  
Intel® processor with EIST support  
BIOS file with EIST support  
Operating system with EIST support (Windows® Vista, Windows® XP SP2/  
Linux 2.6 kernel or later versions).  
ASUS P5K/EPU  
A-1  
A.2.2  
Using the EIST  
To use the EIST feature:  
1.  
2.  
3.  
Turn on the computer, then enter the BIOS Setup.  
Go to the Advanced Menu, highlight CPU Configuration, then press <Enter>.  
Set the Intel(R) SpeedStep Technology item to [Automatic], then press  
<Enter>. See page 4-22 for details.  
4.  
5.  
Press <F10> to save your changes and exit the BIOS setup.  
After the computer restarts, right click on a blank space on the desktop, then  
select Properties from the pop-up menu.  
6.  
7.  
When the Display Properties window appears, click the Screen Saver tab.  
Click the Power button on the  
Monitor power section to open the  
Power Options Properties window.  
8.  
9.  
On the Power schemes section,  
click , then select any option  
except Home/Office Desktop or  
Always On.  
Click Apply, then click OK.  
10. Close the Display Properties  
window.  
After you adjust the power scheme,  
the CPU internal frequency slightly  
decreases when the CPU loading is  
low.  
The screen displays and procedures may vary depending on the operating  
system.  
A-2  
Appendix: CPU features  
A.3  
Intel® Hyper-Threading Technology  
The motherboard supports Intel® Pentium® 4 LGA775 processors with  
Hyper-Threading Technology.  
Hyper-Threading Technology is supported under Windows® Vista/XP and  
Linux 2.4.x (kernel) and later versions only. Under Linux, use the Hyper-  
Threading compiler to compile the code. If you are using any other  
operating systems, disable the Hyper-Threading Technology item in the  
BIOS to ensure system stability and performance.  
Installing Windows® XP Service Pack 1 or later version is recommended.  
Make sure to enable the Hyper-Threading Technology item in BIOS before  
installing a supported operating system.  
For more information on Hyper-Threading Technology, visit  
www.intel.com/info/hyperthreading.  
Using the Hyper-Threading Technology  
To use the Hyper-Threading Technology:  
1.  
2.  
Install an Intel® Pentium® 4 CPU that supports Hyper-Threading Technology.  
Power up the system and enter the BIOS Setup. Under the Advanced Menu,  
make sure that the item Hyper-Threading Technology is set to [Enabled].  
The BIOS item appears only if you installed a CPU that supports  
Hyper-Threading Technology.  
3.  
Restart the computer.  
ASUS P5K/EPU  
A-3  
A-4  
Appendix: CPU features  

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