Asus P5K-EPU User Manual

P5K/EPU

Motherboard

E3691

Second Edition V2
February 2008

Copyright © 2008 ASUSTeK COMPUTER INC. All Rights Reserved.

No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means, except documentation kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK COMPUTER INC. (“ASUS”).

Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the

product is defaced or missing.

ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS
DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY
DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.

SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS
MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.

Products and corporate names appearing in this manual may or may not be registered trademarks or

copyrights of their respective companies, and are used only for identication or explanation and to the
owners’ benet, without intent to infringe.

ii

Contents

Contents ...................................................................................................... iii

Notices ........................................................................................................ vii

Safety information .................................................................................... viii

About this guide ......................................................................................... ix

P5K/EPU specications summary ............................................................ xi

Chapter1: Product introduction

1.1 Welcome ....................................................................................... 1-1

1.2 Package contents .........................................................................

1.3 Special features ............................................................................

Chapter2: Hardware information

2.1 Before you proceed ..................................................................... 2-1

2.2 Motherboard overview .................................................................

2.2.1 Placement direction ........................................................

2.2.2 Screw holes ....................................................................

2.2.3 Motherboard layout .........................................................

2.2.4 Layout contents ...............................................................

2.3 Central Processing Unit (CPU) ...................................................

2.3.1 Installing the CPU ...........................................................

2.3.2 Installing the CPU heatsink and fan ................................

2.3.3 Uninstalling the CPU heatsink and fan ..........................

2.4 System memory .........................................................................

2.4.1 Overview .......................................................................

2.4.2 Memory congurations ..................................................

2.4.3 Installing a DIMM ..........................................................

2.4.4 Removing a DIMM ........................................................

2.5 Expansion slots ..........................................................................

2.5.1 Installing an expansion card .........................................

2.5.2 Conguring an

2.5.3 Interrupt assignments ...................................................

2.5.4 PCI slots ........................................................................

2.5.5 PCI Express x1 slots .....................................................

2.5.6 PCI Express x16 slots ...................................................

2.6 Jumper ........................................................................................

2.7 Connectors .................................................................................

2.7.1 Rear panel connectors ..................................................

expansion card ..................................... 2-19

1-1

1-2

2-2

2-2

2-2

2-3

2-4

2-6

2-7

2-9

2-11

2-13

2-13

2-14

2-18

2-18

2-19

2-19

2-20

2-21

2-21

2-21

2-23

2-24

2-24

iii

Contents

2.7.2 Internal connectors ......................................................... -26

Chapter3: Powering up

3.1 Starting up for the rst time ........................................................ 3-1

3.2 Turning off the computer .............................................................

3.2.1 Using the OS shut down function ....................................

3.2.2 Using the dual function power switch ..............................

Chapter4: BIOS setup

4.1 Managing and updating your BIOS ............................................ 4-1

4.1.1 ASUS Update utility ........................................................

4.1.2 ASUS EZ Flash 2 utility ...................................................

4.1.3 AFUDOS utility ................................................................

4.1.4 ASUS CrashFree BIOS 3 utility ......................................

4.2 BIOS setup program ....................................................................

4.2.1 BIOS menu screen ..........................................................

4.2.2 Menu bar .........................................................................

4.2.3 Navigation keys ...............................................................

4.2.4 Menu items ...................................................................

4.2.5 Sub-menu items ............................................................

4.2.6 Conguration elds .......................................................

4.2.7 Pop-up window .............................................................

4.2.8 Scroll bar .......................................................................

4.2.9 General help .................................................................

4.3 Main menu ..................................................................................

4.3.1 System Time [xx:xx:xx] ..................................................

4.3.2 System Date [Day xx/xx/xxxx] ........................................

4.3.3 Floppy Diskette A [1.44M, 3

4.3.4 SATA 1-4 .......................................................................

4.3.5 SATA Conguration .......................................................

4.3.6 System Information .......................................................

4.4 Advanced menu .........................................................................

4.4.1 JumperFree Conguration ............................................

4.4.2 USB Conguration ........................................................

4.4.3 CPU Conguration ........................................................

4.4.4 Chipset ..........................................................................

4.4.5 OnBoard Devices Conguration ...................................

.5 in.] ..............................................4-11

3-2

3-2

3-2

4-1

4-4

4-5

4-7

4-8

4-9

4-9

4-9

4-10

4-10

4-10

4-10

4-10

4-10

4-11

4-11

4-11

4-12

4-13

4-15

4-16

4-16

4-21

4-23

4-24

4-25

iv

Contents

4.4.6 PCIPnP ......................................................................... 4-26

4.5 Power menu ................................................................................

4.5.1 Suspend Mode [Auto] ...................................................

4.5.2 Repost Video on S3 Resume [Disabled] .......................

4.5.3 ACPI Version [Disabled] ................................................

4.5.4 ACPI APIC Support [Enabled] .......................................

4.5.5 APM Conguration ........................................................

4.5.6 Hardware Monitor .........................................................

4.6 Boot menu ..................................................................................

4.6.1 Boot Device Priority ......................................................

4.6.2 Boot Settings Conguration ..........................................

4.6.3 Security .........................................................................

4.7 Tools menu .................................................................................

4.7.1 ASUS EZ Flash 2 ..........................................................

4.7.2 ASUS Ai Net 2 ...............................................................

4.8 Exit menu ....................................................................................

Chapter5: Software support

5.1 Installing an operating system ................................................... 5-1

5.2 Support DVD information ............................................................

5.2.1 Running the support DVD ...............................................

5.2.2 Drivers menu ...................................................................

5.2.3 Utilities menu ..................................................................

5.2.5 Manual menu ..................................................................

5.2.6 ASUS Contact information ..............................................

5.2.7 Other information ............................................................

5.3 Software information ...................................................................

5.3.1 ASUS MyLogo3™ ...........................................................

5.3.2 AI NET2 ........................................................................

5.3.3 ASUS PC Probe II ..........................................................

5.3.4 ASUS AI Suite ...............................................................

5.3.5 ASUS EPU Utility—AI Gear 3+ .....................................

5.3.6 ASUS AI Nap ................................................................

5.3.7 ASUS Q-Fan 2 ..............................................................

5.3.8 ASUS AI Booster ...........................................................

5.3.9 ASUS AI Direct Link ......................................................

4-27

4-27

4-27

4-27

4-27

4-28

4-29

4-31

4-31

4-32

4-33

4-35

4-35

4-36

4-37

5-1

5-1

5-2

5-3

5-5

5-5

5-6

5-8

5-8

5-10

5-11

5-17

5-19

5-21

5-22

5-23

5-24

v

Contents

Chapter6: ATI® CrossFire™ technology support

6.1 Overview ....................................................................................... 6-1

6.1.1 Requirements ..................................................................

6.1.2 Before you begin .............................................................

6.2 Installing CrossFire™ graphics cards .......................................

6.3 Software information ...................................................................

6.3.1 Installing the device drivers .............................................

6.3.2 Using the Catalyst™ Control Center ...............................

Appendix: CPU features

A.1 Intel® EM64T ..................................................................................A-1

®

A.2 Enhanced Intel SpeedStep

A.2.1 System requirements ......................................................

A.2.2 Using the EIST ................................................................

®

A.3 Intel

Hyper-Threading Technology ...........................................A-3

Technology (EIST) ........................A-1

6-1

6-1

6-2

6-5

6-5

6-7

A-1

A-2

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 modications

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 x it by yourself. Contact a
qualied 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 qualied

service technician or your retailer.

viii

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.

About this guide

This user guide contains the information you need when installing and conguring

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 nd more information

Refer to the following sources for additional information and for product and
software updates.

1. ASUS websites

The ASUS website provides updated information on ASUS hardware and
software products. Refer to the ASUS contact information.

2. Optional documentation

Your product package may include optional documentation, such as warranty

yers, 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 Indicates a menu or an item to select.

Italics

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[lename]

afudos /iP5KEPU.ROM

x

P5K/EPU specications summary

CPU LGA775 socket for Intel® Core™2 Quad /

Chipset Intel® P35 / ICH9 with Intel® Fast Memory Access

System Bus 1600/1333 / 1066 / 800 MHz

Memory 4 x DIMM, max. 8GB, DDR2 1200 (O.C.)/1066 / 800 /

Expansion Slots

Storage Southbridge

LAN

Audio

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

Technology

667MHz, non-ECC, un-buffered memory
Dual channel memory architecture
Refer to www.asus.com or this user manual for the

Memory QVL (Qualied Vendors Lists).

2 x PCIe x16 (blue @ x16 mode, black @ x4 or x1
mode)
2 x PCIe x1
2 x PCI 2.2

- 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

Realtek® ALC883 8-channel High Denition Audio
CODEC

- Supports Enumeration, Multi-streaming technologies

- Coaxial S/PDIF out port at back I/O

(continued on the next page)

xi

P5K/EPU specications summary

IEEE 1394

USB

ASUS AI Lifestyle
Unique features

ASUS Stylish Features

ASUS Exclusive
Overclocking Features

VIA® VT6308P controller supports 2 x IEEE 1394a ports

(one at midboard; one at back panel)

12 x USB 2.0 ports (6 ports at mid-board, 6 ports at back
panel)

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™

Intelligent overclocking tools:

- 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 specications summary

Back Panel I/O Ports

Internal I/O Connectors 3 x USB connectors support additional 6 USB ports

BIOS Features

Manageability WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE

Support DVD Contents Drivers

Form Factor

*Specications are subject to change without notice.

1 x PS/2 Keyboard
1 x PS/2 Mouse
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

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

ASUS PC Probe II
ASUS Update
ASUS AI Suite
Anti-virus software

ATX Form Factor, 12”x 8.6” (30.5cm x 21.8cm)

(OEM version)

xiii

xiv

This chapter describes the motherboard
features and the new technologies
it supports.

Product

1

introduction

Chapter summary

1

1.1 Welcome! ...................................................................................... 1-1

1.2 Package contents .........................................................................

1.3 Special features ............................................................................

1-1

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 ASUS P5K/EPU

Cables 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 ASUS motherboard support DVD

Documentation User guide

If any of the above items is damaged or missing, contact your retailer.

ASUS P5K/EPU

1-1

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 efcient 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 efcient

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 signicantly 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 specication, 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 Denition Audio

Enjoy high-end sound quality on your PC! The onboard 8-channel HD audio (High

Denition 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 ltering, shading, and
texture settings you desire. Adjust your display congurations, 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.

ASUS P5K/EPU

1-3

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

efciency 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

efciency 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 Efciency!

With power efciency so important to operating temperatures, ASUS' 3rd
generation 8-phase VRM design leads the industry with its 96% power
efciency. 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 efciency.

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 efcient 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 "ngers" 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 ash disk containing the BIOS le. See page 4-7 for details.

ASUS EZ Flash 2

EZ Flash 2 is a user-friendly BIOS update utility. Simply press the predened

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 ash utility. See pages 4-4 and 4-35 for details.

ASUS P5K/EPU

1-5

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 netune voltages to achieve the
most precise setting for the ultimate customized overclocking conguration. 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.

information

Hardware

2

Chapter summary

2

2.1 Before you proceed ..................................................................... 2-1

2.2 Motherboard overview .................................................................

2.3 Central Processing Unit (CPU) ...................................................

2.4 System memory .........................................................................

2.5 Expansion slots ..........................................................................

2.6 Jumper ........................................................................................

2.7 Connectors .................................................................................

2-2

2-6

2-13

2-18

2-22

2-23

ASUS P5K/EPU

2.1 Before you proceed

P5K/EPU

®

P5K/EPU Onboard LED

SB_PWR

ON

Standby

Power

OFF

Powered

Off

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.

ASUS P5K/EPU 2-1

P5K/EPU

®

2.2 Motherboard overview

Before you install the motherboard, study the conguration of your chassis to
ensure that the motherboard ts 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

PANEL

P5K/EPU

®

AAFP

CHASSIS

24.5cm (9.6in)

30.5cm (12.0in)

CPU_FAN

FLOPPY

Super

I/O

CD

CLRTC

Intel

®

ICH9

EATXPWR

CR2032 3V
Lithium Cell

CMOS Power

Intel

®

P35

PCI1

USB1112

USB56

KBMS

LAN1_USB12

PCIEX16_1

PCI2

SPDIF_OUT

LGA775

IE1394_2 USB78

ATX12V

ALC883

88E8056

PWR_FAN

DDR2 DIMM_B1 (64 bit,240-pin module)

DDR2 DIMM_B2 (64 bit,240-pin module)

PCIEX1_2

CHA_FAN2

SATA4
SATA3

AUDIO

F_USB34

COM1

BIOS

SB_PWR

DET_X1_2

DET_X16_1

DET_PCI1

PRI_IDE

DDR2 DIMM_A1 (64 bit,240-pin module)

DDR2 DIMM_A2 (64 bit,240-pin module)

DET_PCI2

PCIEX16_2

DET_X16_2

PCIEX1_1

DET_X1_1

CHA_FAN1

USB910

SATA1
SATA2

VIA

VT6308P

SPDIF_O1

EPU

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

1. DDR2 DIMM slots 2-13

2. PCI slots

3. PCI Express x 1 slots

4. PCI Express x16 slots

Jumper Page

1. Clear RTC RAM (3-pin CLRTC) 2-22

Rear panel connectors Page

1. PS/2 mouse port (green) 2-23

2. IEEE 1394a port

3. LAN (RJ-45) port

4. Center/Subwoofer port (orange)

5. Rear Speaker Out port (black)

6. Line In port (light blue)

7. Line Out port (lime)

8. Microphone port (pink)

9. Side Speaker Out port (gray)

10. USB 2.0 ports 1 and 2

11. USB 2.0 ports 3 and 4

12. Coaxial S/PDIF Out port

13. USB 2.0 ports 5 and 6

14. PS/2 keyboard port (purple)

2-20

2-20

2-20

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

2-4 Chapter 2: Hardware information

Internal connectors Page

1. Floppy disk drive connector (34-1 pin FLOPPY)

2. IDE connector (40-1 pin PRI_EIDE))

3. ICH9R Serial ATA connectors (7-pin SATA1 [red], SATA2 [red],
SATA3 [red], SATA4 [red])

4. USB connectors (10-1 pin USB78, USB910, USB1112)

5. IEEE 1394a port connector (10-1 pin IE1394_2)

6. 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)

8. ATX power connectors (24-pin EATXPWR, 4-pin EATX12V)

9. Front panel audio connector (10-1 pin AAFP)

10. Optical drive audio connector (4-pin CD)

11. Digital audio connector (4-1 pin SPDIF_OUT, for ASUS HDMI
card)

12. System panel connector (20-8 pin PANEL)

2-33

2-25

2-25

2-26

2-28

2-28

2-29

2-30

2-30

2-31

2-32

2-32

Q-Connector (system panel)

ASUS P5K/EPU 2-5

2-34

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

P5K/EPU

®

P5K/EPU CPU Socket 775

To install a CPU:

1. Locate the CPU socket on the motherboard.

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

Load lever

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

A

PnP cap

B

This side of the socket box
should face you.

4. Lift the load plate with your thumb

and forenger to a 100º angle (A),

then push the PnP cap from the load
plate window to remove (B).

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 t the socket

alignment key into the
CPU notch.

The CPU ts 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!

CPU notch

Gold triangle mark

B

A

Load plate

6. Close the load plate (A), then

A

push the load lever (B) until it
snaps into the retention tab.

7. If installing a dual-core CPU,
connect the chassis fan cable

B

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®-certied 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

P5K/EPU

®

P5K/EPU CPU fan connector

CPU_FAN

GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM

a diagonal sequence to secure the
heatsink and fan assembly in place.

B

A

A

A

B

B

A

B

3. Connect the CPU fan cable to the connector on the motherboard labeled
CPU_FAN.

DO NOT forget to connect the CPU fan connector! Hardware monitoring errors
can occur if you fail to plug this connector.

2-10 Chapter 2: Hardware information

2.3.3 Uninstalling the CPU heatsink and fan

To uninstall the CPU heatsink and fan:

1. Disconnect the CPU fan cable from
the connector on the motherboard.

2. 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.

A

B

A

A

B

B

A

B

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.

The narrow end of the
groove should point outward
after resetting. (The photo
shows the groove shaded for
emphasis.)

Narrow end of the groove

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

P5K/EPU

®

P5K/EPU 240-pin DDR2 DIMM sockets

DIMM_A2

DIMM_A1

DIMM_B2

DIMM_B1

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 gure illustrates the location of the DDR2 DIMM sockets:

Channel Sockets

Channel A DIMM_A1 and DIMM_A2

Channel B DIMM_B1 and DIMM_B2

• This chipset ofcially 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
ofcially supports. See the table below.

FSB DDR2

1333 1066*

1333 800

1333 667

1066 1066*

1066 800

1066 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 Conguration for details.

ASUS P5K/EPU 2-13

2.4.2 Memory congurations

You may install 512 MB, 1 GB, and 2 GB unbuffered non-ECC DDR2 DIMMs into
the DIMM sockets.

Mode

Single-Channel

Dual-channel (1) Populated Populated - -

Dual-channel (2) Populated Populated Populated Populated

• You may install varying memory sizes in Channel A and Channel B. The

• Always install DIMMs with the same CAS latency. For optimum

• Due to chipset resource allocation, the system may detect less than 8 GB

• If you install four 1 GB memory modules, the system may detect less than

• If you install Windows Vista 32-bit/Windows XP 32-bit version operating

Notes on memory limitations

• Due to chipset limitation, this motherboard can only support up to

DIMM_A1 DIMM_B1 DIMM_A2 DIMM_B2

- Populated -

Populated - - -

system maps the total size of the lower-sized channel for the dual-channel
conguration. Any excess memory from the higher-sized channel is then

mapped for single-channel operation.

compatibility, it is recommended that you obtain memory modules from the
same vendor.

system memory when you installed four 2 GB DDR2 memory modules.

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.

system, we recommend that you install less than 3GB of total memory.

8 GB on the operating systems listed below. You may install a maximum of
2 GB DIMMs on each slot.

Sockets

64-bit

Windows XP Professional x64 Edition

Windows Vista x64 Edition

2-14 Chapter 2: Hardware information

P5K/EPU Motherboard Qualied Vendors Lists (QVL)
DDR2-1200MHz(O.C.) capability

Size Vendor Chip No. CL Chip Brand SS/DS Part No. DIMM support

512MB Kingston Heat-Sink Package N/A N/A SS KHX9600D2/512 V
1024MB Kingston Heat-Sink Package N/A N/A DS KHX9600D2/1G V

A* B* C*

P5K/EPU Motherboard Qualied Vendors Lists (QVL)
DDR2-1066MHz capability

Size Vendor Chip No. CL Chip Brand SS/DS Part No. DIMM support

512MB KINGSTON Heat-Sink Package N/A N/A SS KHX8500D2/512 V V V
1024MB CORSAIR Heat-Sink Package 5 N/A DS CM2X1024-8500C5 V V
512MB KINGMAX KKA8FEIBF-HJK-

1024MB KINGMAX KKA8FEIBF-HJK-

18E

18A

N/A KINGMAX SS KLEC28F-A8KI5-

N/A KINGMAX DS KLED48F-A8KI5-EPA V V

EGAS

A* B* C*

V V V

P5K/EPU Motherboard Qualied Vendors Lists (QVL)
DDR2-800MHz capability

Size Vendor Chip No. CL Chip Brand SS/DSPart No. DIMM

512MB KINGSTON K4T51083QC 5 SEC SS KVR800D2N5/512 V V V
1024MB KINGSTON Heat-Sink Package 4-4-4-12 N/A DS KHX6400D2LL/1G V V
1024MB KINGSTON Heat-Sink Package 4-4-4-12 N/A SS KHX6400D2LLK2/1GN V V V
1024MB KINGSTON V59C1512804QBF25 N/A N/A DS KVR800D2N5/1G V V
1024MB KINGSTON Heat-Sink Package N/A N/A SS KHX6400D2ULK2/1G V V V
2048MB KINGSTON Heat-Sink Package N/A N/A DS KHX6400D2ULK2/2G V V
512MB Qimonda HYB18T512800BF25F 5-5-5 N/A SS HYS64T64000HU-

1024MB Qimonda HYB18T512800BF25F 5-5-5 N/A DS HYS64T128020HU-

512MB Hynix HY5PS12821CFP-S5 5-5-5 Hynix SS HYMP564U64CP8-S5 V V V
1024MB Hynix HY5PS12821CFP-S5 5-5-5 Hynix DS HYMP512U64CP8-S5 V V
512MB MICRON D9GKX N/A N/A SS MT8HTF6464AY-

1024MB MICRON D9GKX N/A N/A DS MT16HTF12864AY-

512MB CORSAIR Heat-Sink Package 5 N/A SS CM2X512A-6400
1024MB CORSAIR Heat-Sink Package 4 N/A DS CM2X1024-6400C4 V V
1024MB ELPIDA E1108AB-8E-E(ECC) 5 ELPIDA SS EBE10EE8ABFA-8E-E
2048MB ELPIDA E1108AB-8E-E(ECC) 5 ELPIDA DS EBE21EE8ABFA-8E-E

25F-B

25F-B

80ED4

80ED4

support
A* B* C*

V V V

V V

V V V

V V

ASUS P5K/EPU 2-15

P5K/EPU Motherboard Qualied Vendors Lists (QVL)
DDR2-800MHz capability

Size Vendor Chip No. CL Chip Brand SS/

512MB Crucial Heat-Sink Package 4 N/A SS BL6464AA804.8FD V V V
512MB Crucial Heat-Sink Package 4 N/A SS BL6464AA804.8FD3
1024MB Crucial Heat-Sink Package 4 N/A DS BL12864AA804.16FD V V
1024MB Crucial Heat-Sink Package 4 N/A DS BL12864AL804.16FD3 V V
1024MB Crucial Heat-Sink Package 4 N/A DS BL12864AA804.16FD3 V V
512MB Apacer Heat-Sink Package 5 N/A DS AHU512E800C5K1C V V V
1024MB Apacer Heat-Sink Package 5 N/A DS AHU01GE800C5K1C V V
512MB A-DATA AD29608A8A-25EG N/A N/A SS M2OAD6G3H3160G1E53 V V V
1024MB A-DATA AD26908A8A-25EG N/A N/A DS M2OAD6G3I4170I1E58 V V
512MB KINGMAX KKA8FEIBF-HJK-25A N/A KINGMAX SS KLDC28F-A8KI5 V V V
1024MB KINGMAX KKA8FEIBF-HJK-25A N/A KINGMAX DS KLDD48F-ABKI5 V V
512MB Transcend HY5PS12821CFP-S5 N/A Hynix SS TS64MLQ64V8J V V V
1024MB Transcend HY5PS12821CFP-S5 N/A Hynix DS TS128MLQ64V8J V V
512MB Super

Talent

1024MB Super

Talent
512MB NANYA NT5TU64M8BE-25C 5 NANYA SS NT512T64U880BY-25C V V V
1024MB NANYA NT5TU64M8BE-25C 5 NANYA DS NT1GT64U8HB0BY-25C V V
1024MB NANYA NT5TU64M8CE-25D N/A NANYA DS NT1GT64U8HCOBY-25D V V V
512MB PSC A3R12E3HEF641B9A05 5 PSC SS AL6E8E63B8E1K V V
1024MB PSC A3R12E3HEF641B9A05 5 PSC DS AL7E8E63B-8E1K V V V
256MB TwinMOS E2508AB-GE-E 5 ELPIDA SS 8G-24IK2-EBT V V
1024MB Elixir N2TU51280BE-25C N/A Elixir DS M2Y1G64TU8HB0B-25C V V

Heat-Sink Package N/A N/A SS T800UA12C4 V V V

Heat-Sink Package N/A N/A DS T800UB1GC4

Part No. DIMM

DS

support
A* B* C*

2-16 Chapter 2: Hardware information

P5K/EPU Motherboard Qualied Vendors Lists (QVL)
DDR2-667MHz capability

Size Vendor Chip No. CL Chip Brand SS/

512MB KINGSTON D6408TEBGGL3U 5 KINGSTON SS KVR667D2N5/512 V V V
256MB KINGSTON HYB18T256800AF3S 5 N/A SS KVR667D2N5/256 V V V
256MB KINGSTON 6SBI2D9DCG 5 MICRON SS KVR667D2N5/256 V V V
512MB Qimonda HYB18T512800BF3S(ECC) 5-5-5 N/A SS HYS72T64000HU-3S-B
1024MB Qimonda HYB18T512800BF3S(ECC) 5-5-5 N/A DS HYS72T128020HU-3S-B
512MB Qimonda HYB18T512800BF3S 5 N/A SS HYS64T64000HU-3S-B V V V
1024MB Qimonda HYB18T512800BF3S 5 N/A DS HYS64T128020HU-3S-B V V V
512MB SAMSUNG K4T51163QE-ZCE6 5 SAMSUNG DS M378T3354EZ3-CE6
256MB SAMSUNG K4T51083QE 5 SAMSUNG SS M378T6553EZS-CE6 V V V
1024MB SAMSUNG K4T51083QE 5 SAMSUNG DS M378T2953EZ3-CE6 V V
256MB Hynix HY5PS121621CFP-Y5 5 Hynix SS HYMP532U64CP6-Y5 V V V
1024MB Hynix HY5PS12821CFP-Y5 5 Hynix DS HYMP512U64CP8-Y5 V V
256MB CORSAIR MIII00605 N/A N/A SS VS256MB667D2 V V V
512MB CORSAIR 64M8CFEG N/A N/A SS VS512MB667D2 V V V
1024MB CORSAIR 64M8CFEG N/A N/A DS VS1GB667D2 V V
256MB ELPIDA E2508AB-6E-E 5 ELPIDA SS EBE25UC8ABFA-6E-E V V V
512MB ELPIDA E5108AE-6E-E 5 ELPIDA SS EBE51UD8AEFA-6E-E
512MB A-DATA AD29608A8A-3EG 5 A-DATA SS M2OAD5G3H3166I1C52 V V V
1024MB A-DATA AD29608A8A-3EG 5 A-DATA DS M2OAD5G3I4176I1C52 V V
1024MB crucial Heat-Sink Package 3 N/A DS BL12864AA663.16FD V V
1024MB crucial Heat-Sink Package 3 N/A DS BL12864AL664.16FD V V
1024MB crucial Heat-Sink Package 3 N/A DS BL12864AA663.16FD2
512MB Apacer AM4B5708GQJS7E0628F 5 APACER SS AU512E667C5KBGC V V
1024MB Apacer AM4B5708GQJS7E 5 APACER DS AU01GE667C5KBGC V V
512MB Transcend K4T51083QE N/A SAMSUNG SS TS64MLQ64V6J V
1024MB Transcend K4T51083QE N/A SAMSUNG DS TS128MLQ64V6J V V
256MB Kingmax N2TU51216AG-3C 5 NANYA SS KLCB68F-36KH5 V V
512MB Kingmax KKEA88B4LAUG-29DX 5 KINGMAX SS KLCC28F-A8KB5 V V V
1024MB Kingmax KKEA88B4LAUG-29DX 5 KINGMAX DS KLCD48F-A8KB5 V V
512MB Super

Talent

1024MB Super

Talent
512MB NANYA NT5TU64M8BE-3C 5 NANYA SS NT512T64U88B0BY-3C V V V

512MB PSC A3R12E3GEF637BLC5N 5 PSC SS AL6E8E63B-6E1K V V V
1024MB PSC A3R12E3GEF637BLC5N 5 PSC DS AL7E8E63B-6E1K V V
512MB TwinMOS E5108AE-GE-E 5 ELPIDA SS 8G-25JK5-EBT
512MB TwinMOS TMM6208G8M30C 5 TwinMOS SS 8D-23JK5M2ETP V V V

Heat-Sink Package 5 N/A SS T6UA512C5 V V V

Heat-Sink Package 5 N/A DS T6UB1GC5 V V

Part No. DIMM

DS

support
A* B* C*

SS - Single-sided / DS - Double-sided
DIMM support:

• A*: Supports one module inserted in any slot as Single-channel

memory conguration.

• B*: Supports one pair of modules inserted into either the yellow slots
or the black slots as one pair of Dual-channel memory conguration.

• C*: Supports four modules inserted into both the yellow and black slots

as two pairs of Dual-channel memory conguration.

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.

To install a DIMM:

1. Unlock a DIMM socket by pressing
the retaining clips outward.

2. Align a DIMM on the socket
such that the notch on the DIMM
matches the break on the socket.

3. Firmly insert the DIMM into the
socket until the retaining clips
snap back in place and the DIMM
is properly seated.

• A DDR2 DIMM is keyed with a notch so that it ts 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:

1. Simultaneously press the retaining
clips outward to unlock the DIMM.

2

3

1

DDR2 DIMM notch

1

Unlocked retaining clip

2

Support the DIMM lightly with

your ngers when pressing the

retaining clips. The DIMM might

get damaged when it ips 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. Before installing the expansion card, read the documentation that came with
it and make the necessary hardware settings for the card.

2. Remove the system unit cover (if your motherboard is already installed in a
chassis).

3. Remove the bracket opposite the slot that you intend to use. Keep the screw
for later use.

4. Align the card connector with the slot and press rmly until the card is

completely seated on the slot.

5. Secure the card to the chassis with the screw you removed earlier.

6. Replace the system cover.

2.5.2 Conguring an expansion card

After installing the expansion card, congure 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. Assign an IRQ to the card. Refer to the tables on the next page.

3. 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, conicts 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 System Timer
1 2 Keyboard Controller
2 — Re-direct to IRQ#9
3 9 IRQ holder for PCI steering*
4 12 Communications Port (COM1)*
5 13 IRQ holder for PCI steering*
6 14 Floppy Disk Controller
7 15 Printer Port (LPT1)*
8 3 System CMOS/Real Time Clock

9 4 IRQ holder for PCI steering*
10 5 IRQ holder for PCI steering*
11 6 IRQ holder for PCI steering*
12 7 PS/2 Compatible Mouse Port*
13 8 Numeric Data Processor
14 10 Primary IDE Channel
15 11 Secondary IDE Channel

* These IRQs are usually available for PCI devices.

IRQ assignments for this motherboard

A B C D E F G H

PCI slot 1 — shared — — — — — —
PCI slot 2 — shared — — — — —
LAN(8056) — shared — — — — — —
PCIE x16 1 shared — — — — — — —
PCIE x16 2 shared — — — — — — —
PCIE x1 1 — — shared — — — — —
PCIE x1 2 — — — shared — — — —
USB controller 1 — — — — — — — used
USB controller 2 — — — shared — — — —
USB controller 3 — — shared — — — — —
USB controller 4 shared — — — — — — —
USB controller 5 shared — — — — — — —
USB controller 6 shared
USB 2.0 controller 1 — — — — — used — —
USB 2.0 controller 2 — — shared — — — — —
SATA controller 1 — — shared — — — — —
SATA controller 2 — 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

specications. The gure 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

specications. The following gure

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 specications. 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

specications.

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 specications.

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 gure 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 slot

Auto Automatically optimizes performance and

x4 mode [fast] User gets the best performance but this mode

x1 mode [compatible] Always runs at PCI Express x1 speed

•

•

PCI Express operating speed

functionality according to devices installed

disables the PCI Express x1 slot

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

P5K/EPU

®

P5K/EPU Clear RTC RAM

CLRTC

Normal

(Default)

Clear RTC

1 2 2 3

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!

ASUS P5K/EPU 2-23

• 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.

2.7 Connectors

4

89

6753

10

2

1113 12

1

14

2.7.1 Rear panel connectors

1. PS/2 mouse port (green). This port is for a PS/2 mouse.

2. IEEE 1394a port.

connectivity for audio/video devices, storage peripherals, PCs, or portable
devices.

3. LAN (RJ-45) port.

Network (LAN) through a network hub. Refer to the table below for the LAN
port LED indications.

4. Center/Subwoofer port (orange).

speakers.

LAN port LED indications

Activity/Link Speed LED
Status Description Status Description

OFF No link OFF 10 Mbps connection
ORANGE Linked ORANGE 100 Mbps connection
BLINKING Data activity GREEN 1 Gbps connection

This 6-pin IEEE 1394a port provides high-speed

This port allows Gigabit connection to a Local Area

This port connects the center/subwoofer

ACT/LINK

LED

LAN port

SPEED

LED

5. Rear Speaker Out port (black).

This port connects the rear speakers in a

4-channel, 6-channel, or 8-channel audio conguration.

6. 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 conguration, the function of this port

2-24 Chapter 2: Hardware information

becomes Front Speaker Out.

8. Microphone port (pink). This port connects a microphone.

9. Side Speaker Out port (gray).

This port connects the side speakers in an

8-channel audio conguration.

Refer to the audio conguration table below for the function of the audio ports in
2, 4, 6, or 8-channel conguration.

Audio 2, 4, 6, or 8-channel conguration

Port Headset

2-channel

Light Blue Line In Line In Line In Line In
Lime Line Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink Mic In Mic In Mic In Mic In
Orange – – Center/Subwoofer Center/Subwoofer
Black – Rear Speaker Out Rear Speaker Out Rear Speaker Out
Gray – – – Side Speaker Out

4-channel 6-channel 8-channel

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.

ASUS P5K/EPU

2-25

2.7.2 Internal connectors

P5K/EPU

®

P5K/EPU Floppy disk drive connector

NOTE: Orient the red markings on

the floppy ribbon cable to PIN 1.

FLOPPY

PIN 1

P5K/EPU

®

P5K/EPU IDE connector

NOTE: Orient the red markings

(usually zigzag) on the IDE
ribbon cable to PIN 1.

PRI_EIDE

1. Floppy disk drive connector (34-1 pin FLOPPY)

This connector is for the provided oppy 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 oppy disk drive.

Pin 5 on the connector is removed to prevent incorrect cable connection when
using a FDD cable with a covered Pin 5.

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 congure your device.

Drive jumper setting Mode of

Cable connector

device(s)

Single device Cable-Select or Master - Black

Two devices Cable-Select Master

2-26 Chapter 2: Hardware information

Master Master Black or gray
Slave Slave

Slave Gray

Black

P5K/EPU

®

GND

RSATA_TXP4

RSATA_TXN4

GND

RSATA_RXP4

RSATA_RXN4

GND

GND

RSATA_TXP1

RSATA_TXN1

GND

RSATA_RXP1

RSATA_RXN1

GND

P5K/EPU SATA connectors

SATA1

GND

RSATA_TXP2

RSATA_TXN2

GND

RSATA_RXP2

RSATA_RXN2

GND

GND

RSATA_TXP3

RSATA_TXN3

GND

RSATA_RXP3

RSATA_RXN3

GND

SATA2

SATA4

SATA3

• 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. ICH9R 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.

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 conict with huge

graphics cards.

ASUS P5K/EPU

2-27

4. USB connectors (10-1 pin USB 78, USB 9 10, USB 11 12)

P5K/EPU

®

P5K/EPU USB 2.0 connectors

USB+5V

USB_P12-

USB_P12+

GND

NC

USB+5V

USB_P11-

USB_P11+

GND

PIN1

USB1112

USB+5V

USB_P10-

USB_P10+

GND

NC

USB+5V

USB_P9-

USB_P9+

GND

PIN1

USB910

USB+5V

USB_P8-

USB_P8+

GND

NC

USB+5V

USB_P7-

USB_P7+

GND

PIN1

USB78

P5K/EPU

®

P5K/EPU IEEE 1394a connector

IE1394_2

PIN 1

TPA1-

GND

TPB1-

+12V

GND

TPA1+

GND

TPB1+

+12V

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

specication that supports up to 480 Mbps connection speed.

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) rst, 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.

2-28 Chapter 2: Hardware information

P5K/EPU

®

P5K/EPU Fan connectors

CPU_FAN

CHA_FAN1

GND

Rotation

+12V

GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM

CHA_FAN2

GND

Rotation

+12V

PWR_FAN

GND

Rotation

+12V

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) rst, 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. Insufcient air
ow inside the system may damage the motherboard components. These are

not jumpers! DO NOT place jumper caps on the fan connectors!

ASUS P5K/EPU

• 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

7. Chassis intrusion connector (4-1 pin CHASSIS)

P5K/EPU

®

P5K/EPU Chassis intrusion connector

CHASSIS

+5VSB_MB

Chassis Signal

GND

(Default)

P5K/EPU

®

P5K/EPU ATX power connectors

EATXPWR

+3 Volts

+3 Volts

Ground

+5 Volts

+5 Volts

Ground

Ground

Power OK

+5V Standby

+12 Volts

-5 Volts

+5 Volts

+3 Volts

-12 Volts

Ground

Ground
Ground
PSON#

Ground

+5 Volts

+12 Volts

+3 Volts

+5 Volts

Ground

ATX12V

+12V DC
GND

+12V DC

GND

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.

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 t these connectors in only one orientation. Find the proper
orientation and push down rmly until the connectors completely t.

2-30 Chapter 2: Hardware information

• For a fully congured system, we recommend that you use a power supply

P5K/EPU

®

P5K/EPU Analog front panel connector

AAFP

Legacy AC ‘97 audio
pin definition

SENSE2_RETUR

PORT1 L

PORT2 R

PORT2 L

SENSE1_RETUR

SENSE_SEND

PORT1 RPRESENCE#

GND

NC

MIC2

Line out_R

Line out_L

NC

NC

MICPWRNC

AGND

HD Audio-compliant

pin definition

unit (PSU) that complies with ATX 12 V Specication 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

conguring 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 Specication 2.0-compliant (400W) PSU has been tested

to support the motherboard power requirements with the following
conguration:
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.

•

We recommend that you connect a high-denition front panel audio

module to this connector to avail of the motherboard’s high-denition audio

capability.

•

If you want to connect a high-denition 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.

ASUS P5K/EPU

2-31

P5K/EPU

®

P5K/EPU Internal audio connector

CD

Right Audio Channel

Left Audio Channel

Ground

Ground

10. Optical drive audio connector (4-pin CD)

P5K/EPU

®

P5K/EPU Digital audio connector

+5V

SPDIFOUT

GND

SPDIF_OUT

This connector allows you to receive stereo audio input from sound sources
such as a CD-ROM, TV tuner, or MPEG card.

(black)

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.

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)

P5K/EPU

®

P5K/EPU System panel connector

*

Requires an ATX power supply.

PANEL

PLED-

PWR

+5V

Speaker

Ground

RESET

Ground

Reset

Ground

Ground

PWRSW

PLED+

IDE_LED-

IDE_LED+

IDE_LED

PLED SPEAKER

This connector supports several chassis-mounted functions.

•

System power LED (2-pin PLED)

This 2-pin connector is for the system power LED. Connect the chassis
power LED cable to this connector. The system power LED lights up when
you turn on the system power, and blinks when the system is in sleep mode.

•

Hard disk drive activity LED (2-pin IDE_LED)

This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity

LED cable to this connector. The IDE LED lights up or ashes when data is

read from or written to the HDD.

•

System warning speaker (4-pin SPEAKER)

This 4-pin connector is for the chassis-mounted system warning speaker. The
speaker allows you to hear system beeps and warnings.

•

ATX power button/soft-off button (2-pin PWRSW)

This connector is for the system power button. Pressing the power button
turns the system on or puts the system in sleep or soft-off mode depending
on the BIOS settings. Pressing the power switch for more than four seconds
while the system is ON turns the system OFF.

•

Reset button (2-pin RESET)

This 2-pin connector is for the chassis-mounted reset button for system
reboot without turning off the system power.

ASUS P5K/EPU

2-33

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 Q­Connector.

1. Connect the front panel cables to the
ASUS Q-Connector.

Refer to the labels on the Q-Connector

to know the detailed pin denitions, then

match them to the respective front panel
cable labels.

2. Install the ASUS Q-Connector to the
system panel connector, making sure
the orientation matches the labels on the
motherboard.

3. The front panel functions are now enabled.

The gure 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 rst time ........................................................ 3-1

3.2 Turning off the computer .............................................................

3-2

ASUS P5K/EPU

3.1 Starting up for the rst time

1. After making all the connections, replace the system case cover.

2. Be sure that all switches are off.

3. Connect the power cord to the power connector at the back of the system
chassis.

4. Connect the power cord to a power outlet that is equipped with a surge
protector.

5. 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

One continuous beep followed by two
short beeps then a pause (repeated)

One continuous beep followed by three
short beeps

One continuous beep followed by four
short beeps

Quick boot set to disabled
No keyboard detected

No memory detected

No VGA detected

Hardware component failure

7. At power on,

hold down the <Delete> key to enter the BIOS Setup. Follow

ㄞ

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. Click the Start button then select Turn Off Computer.

2. Click the Turn Off button to shut down the computer.

3. The power supply should turn off after Windows

If you are using Windows® Vista:

®

shuts down.

1. Click the Start button then select ShutDown.

2. 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

Chapter 4 for details.

in

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 Managing and updating your BIOS ............................................ 4-1

BIOS setup program .................................................................... 4-8

4.2

4.3 Main menu .................................................................................. 4-11

4.4 Advanced menu .........................................................................

4.5 Power menu ................................................................................

4.6 Boot menu ..................................................................................

4.7 Tools menu .................................................................................

4.8 Exit menu ....................................................................................

4-16

4-26

4-30

4-34

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.

ASUS Update (Updates the BIOS in Windows® environment.)

ASUS EZ Flash 2 (Updates the BIOS using a oppy disk or USB ash disk.)

2.

ASUS AFUDOS (Updates the BIOS using a bootable oppy disk)

3.

ASUS CrashFree BIOS 3 (Updates the BIOS using a USB ash disk or the

4.

motherboard support DVD when the BIOS le fails or gets corrupted.)

Refer to the corresponding sections for details on these utilities.

Save a copy of the original motherboard BIOS le to a bootable oppy disk or
USB ash 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 le

• Download the latest BIOS le from the Internet

• Update the BIOS from an updated BIOS le

• 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. Place the support DVD in the optical drive. The Drivers menu appears.

2. Click the Utilities tab, then click Install ASUS Update VX.XX.XX.

3. The ASUS Update utility is copied to your system.

Quit all Windows® applications before you update the BIOS using this utility.

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Updating the BIOS through the Internet

To update the BIOS through the Internet:

1. Launch the ASUS Update utility from the Windows

> Programs > ASUS > ASUSUpdate > ASUSUpdate. The ASUS Update
main window appears.

®

desktop by clicking Start

2. Select Update BIOS from the

Internet option from the drop-down
menu, then click Next.

4-2 Chapter 4: BIOS setup

3. Select the ASUS FTP site nearest

you to avoid network trafc, or

click Auto Select. Click Next.

4. From the FTP site, select the BIOS
version that you wish to download.
Click Next.

5. 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 le

To update the BIOS through a BIOS le:

1. Launch the ASUS Update utility from the Windows
> Programs > ASUS > ASUSUpdate > ASUSUpdate. The ASUS Update
main window appears.

2. Select

Update BIOS from a le

option from the drop-down menu,
then click Next.

®

desktop by clicking Start

3. Locate the BIOS le from the Open

window, then click Open.

4. Follow the screen instructions to
complete the update process.

ASUS P5K/EPU

P5K/EPU.ROM

P5K/EPU

4-3

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 oppy 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. Visit the ASUS website (www.asus.com) to download the latest BIOS le for

the motherboard.

2. Save the BIOS le to a oppy disk or a USB ash disk, then restart the

system.

3. You can launch the EZ Flash 2 by two methods.

Insert the oppy disk / USB ash disk that contains the BIOS le to the

(1)

oppy 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
DATE: 09/13/07

PATH: A:\

A:

Update ROM

BOARD: Unknown
VER: Unknown
DATE: Unknown

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 le

is found. Then press <Enter>.

4. When the correct BIOS le 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 ash disk, or oppy disk

with

FAT 32/16

• DO NOT shut down or reset the system while updating the BIOS to prevent
system boot failure!

4-4 Chapter 4: BIOS setup

format and single partition only.

4.1.3 AFUDOS utility

The AFUDOS utility allows you to update the BIOS le in DOS environment using
a bootable oppy disk with the updated BIOS le. This utility also allows you to
copy the current BIOS le 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 le using the AFUDOS utility:

• Make sure that the oppy disk is not write-protected and has at least
1024KB free space to save the le.

• The succeeding BIOS screens are for reference only. The actual BIOS
screen displays may not be same as shown.

1. Copy the AFUDOS utility (afudos.exe) from the motherboard support DVD to

the bootable oppy disk you created earlier.

2. Boot the system in DOS mode, then at the prompt type:

afudos /o[lename]

where the [lename] is any user-assigned lename not more than eight
alphanumeric characters for the main lename and three alphanumeric

characters for the extension name.

A:\>afudos /oOLDBIOS1.rom

Main lename Extension name

3. Press <Enter>. The utility copies the current BIOS le to the oppy 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 ash ..... done

Write to le...... ok

A:\>

The utility returns to the DOS prompt after copying the current BIOS le.

Updating the BIOS le

To update the BIOS le using the AFUDOS utility:

1. Visit the ASUS website (www.asus.com) and download the latest BIOS le for
the motherboard. Save the BIOS le to a bootable oppy disk.

ASUS P5K/EPU

4-5

Write the BIOS lename on a piece of paper. You need to type the exact BIOS
lename at the DOS prompt.

2. Copy the AFUDOS utility (afudos.exe) from the motherboard support DVD to

the bootable oppy disk you created earlier.

3. Boot the system in DOS mode, then at the prompt type:

afudos /i[lename]

where [lename] is the latest or the original BIOS le on the bootable oppy

disk.

A:\>afudos /P5KEPU.ROM

4. The utility veries the le 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 ash BIOS

Reading le ....... done

Reading ash ...... done

Advance Check ......

Erasing ash ...... done

Writing ash ...... 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 ash BIOS

Reading le ....... done

Reading ash ...... done

Advance Check ......

Erasing ash ...... done

Writing ash ...... done

Verifying ash .... 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 le when it fails or gets corrupted during the updating process. You can
update a corrupted BIOS le using the motherboard support DVD or the USB ash
disk that contains the updated BIOS le.

Prepare the motherboard support DVD or the USB ash 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. Turn on the system.

2. Insert the motherboard support DVD to the optical drive.

3. The utility displays the following message and automatically checks the DVD

for the BIOS le.

Bad BIOS checksum. Starting BIOS recovery...

Checking for oppy...

When found, the utility reads the BIOS le and starts ashing the corrupted

BIOS le.

Bad BIOS checksum. Starting BIOS recovery...
Checking for oppy...
Floppy found!
Reading le “P5KEPU.ROM”. Completed.
Start ashing...

4. Restart the system after the utility completes the updating process.

Recovering the BIOS from the USB ash disk

To recover the BIOS from the USB ash disk:

1. Insert the USB ash disk that contains BIOS le to the USB port.

2. Turn on the system.

3. The utility will automatically checks the devices for the BIOS le When found,
the utility reads the BIOS le and starts ashing the corrupted BIOS le.

4. Restart the system after the utility completes the updating process.

• Only the USB ash 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!

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4-7

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, reconguring
your system, or prompted to “Run Setup.” This section explains how to congure

your system using this utility.

Even if you are not prompted to use the Setup program, you can change the

conguration 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 recongure 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 rst 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 le for

this motherboard.

4-8 Chapter 4: BIOS setup

4.2.1 BIOS menu screen

Menu bar

Main Advanced Power Boot Tools Exit

System Time [10:55:25]
System Date [Thu 04/14/2007]
Floppy Diskette A [1.44M, 3.5 in.]
Language [English]

SATA1 [Not Detected]
SATA2 [Not Detected]
SATA3 [Not Detected]
SATA4 [Not Detected]

SATA Conguration
System Information

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

Sub-menu items

Conguration eldsMenu items

BIOS SETUP UTILITY

General help

Use [ENTER], [TAB]
or [SHIFT-TAB] to
select a eld.

Use [+] or [-] to
congure the System
Time.

Select Screen

Select Item

Change Field

+-

Tab Select Field
F1 General Help
F10 Save and Exit
ESC Exit

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 conguration

Advanced For changing the advanced system settings

Power For changing the advanced power management (APM)

conguration

Boot For changing the system boot conguration

Tools For conguring options for special functions

Exit 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.

ASUS P5K/EPU

4-9

4.2.4 Menu items

The highlighted item on the menu bar

displays the specic items for that

menu. For example, selecting Main
shows the Main menu items.

The other items (Advanced, Power,
Boot, and Exit) on the menu bar have
their respective menu items.

System Time [06:22:54]
System Date [Thu 04/14/2007]
Floppy Diskette A [1.44M, 3.5 in.]
Language [English]

SATA1 [Not Detected]
SATA2 [Not Detected]
SATA3 [Not Detected]
SATA4 [Not Detected]
SATA5 [Not Detected]
SATA6 [Not Detected]

SATA Conguration
System Information

Main menu items

Use [ENTER], [TAB],
or [SHIFT-TAB] to
select a eld.

Use [+] or [-] to
congure system.

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 Conguration elds

These elds show the values for the menu items. If an item is user- congurable,
you can change the value of the eld opposite the item. You cannot select an item
that is not user-congurable.

A congurable eld is enclosed in brackets, and is highlighted when selected. To
change the value of a eld, 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

conguration 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 t on the screen. Press the
Up/Down arrow keys or <Page Up> /<Page
Down> keys to display the other items on
the screen.

4.2.9 General help

At the top right corner of the menu screen
is a brief description of the selected item.

4-10 Chapter 4: BIOS setup

Pop-up window

Scroll bar

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.

Main Advanced Power Boot Tools Exit

System Time [10:55:25]
System Date [Thu 09/20/2007]
Floppy Diskette A [1.44M, 3.5 in.]
Language [English]

SATA1 [Not Detected]
SATA2 [Not Detected]
SATA3 [Not Detected]
SATA4 [Not Detected]
SATA5 [Not Detected]
SATA6 [Not Detected]

SATA Conguration
System Information

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

BIOS SETUP UTILITY

Use [ENTER], [TAB]
or [SHIFT-TAB] to
select a eld.

Use [+] or [-] to
congure the System
Time.

Select Screen

Select Item

Change Field

+-

Tab Select Field
F1 General Help
F10 Save and Exit
ESC Exit

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 oppy drive installed.
Conguration options: [Disabled] [720K , 3.5 in.] [1.44M, 3.5 in.]

ASUS P5K/EPU

4-11

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.

Main

SATA 1

Device : Hard Disk
Vendor : WDC WD800JD-00LSA0
Size : 80.0GB
LBA Mode : Supported
Block Mode : 16 Sectors
PIO Mode : 4
Async DMA : MultiWord DMA-2
Ultra DMA : Ultra DMA-5
SMART Monitoring: Supported

Type [Auto]
LBA/Large Mode [Auto]
Block(Multi-Sector Transfer) [Auto]
PIO Mode [Auto]
DMA Mode [Auto]
SMART Monitoring [Auto]
32Bit Data Transfer [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-congurable. 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 specically conguring a

DVD-ROM drive. Select [ARMD] (ATAPI Removable Media Device) if your device
is either a ZIP, LS-120, or MO drive.

Conguration options: [Not Installed] [Auto] [DVDROM] [ARMD]

BIOS SETUP UTILITY

Sel ect t he ty pe of
device connecte d to
the system.

Select Screen

Select Item

Change Option

+-

F1 General Help
F10 Save and Exit
ESC Exit

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. Conguration 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.

Conguration options: [Disabled] [Auto]

PIO Mode [Auto]

Allows you to select the data transfer mode.

Conguration options: [Auto] [0] [1] [2] [3] [4]

4-12 Chapter 4: BIOS setup

DMA Mode [Auto]

Selects the DMA mode.

Conguration 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.

Conguration options: [Auto] [Disabled] [Enabled]

32Bit Data Transfer [Enabled]

Enables or disables 32-bit data transfer.

Conguration options: [Disabled] [Enabled]

4.3.5 SATA Conguration

The items in this menu allow you to set or change the congurations for the SATA

devices installed in the system. Select an item then press <Enter> if you want to

congure the item.

SATA Conguration

SATA Conguraton [Enhanced]

Congure SATA as [IDE]

Hard Disk Write Protect [Disabled]
SATA Detect Time Out (Sec) [35]

Options

Disabled
Compatible
Enhanced

SATA Conguration [Enhanced]

Conguration options: [Disabled] [Compatible] [Enhanced]

Configure SATA as [IDE]

Sets the conguration for the Serial ATA connectors supported by the
Southbridge chip. Conguration options: [IDE] [RAID] [AHCI]

If you want to use the Serial ATA hard disk drives as Parallel ATA physical
storage devices, keep the default setting [IDE].

Hard Disk Write Protect [Disabled]

Disables or enables device write protection. This will be effective only if the device

is accessed through BIOS. Conguration option: [Disabled] [Enabled]

SATA Detect Time Out (Sec) [35]

Selects the time out value for detecting ATA/ATAPI devices.

Conguration options: [0] [5] [10] [15] [20] [25] [30] [35]

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AHCI Port1

Device :Not Detected

SATA Port1 [Auto]
SMART Monitoring [Enabled]

Select the type of
devices connected to
the system.

SATA Port1 [Auto]

Allows you to select the type of device connected to the system.

Conguration options: [Auto] [Not Installed]

SMART Monitoring [Enabled]

Enables or disables the SMART monitoring function. S.M.A.R.T stands for
Self-Monitoring, Analysis and Reporting Technology.

Conguration options: [Enabled] [Disabled]

4-14 Chapter 4: BIOS setup

4.3.6 System Information

This menu gives you an overview of the general system specications. The BIOS

automatically detects the items in this menu.

Main

AMIBIOS

Version : 0004
Build Date : 09/13/07

Processor

Type : Intel(R) Core(TM)2 Duo CPU @ 3.00GHz
Speed : 3000 MHz
Count : 2

System Memory

Available : 512 MB

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

AMIBIOS

Displays the auto-detected BIOS information.

Processor

Displays the auto-detected CPU specication.

System Memory

Displays the auto-detected system memory.

BIOS SETUP UTILITY

Select Screen

Select Item
F1 General Help
F10 Save and Exit
ESC Exit

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4-15

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

eld values can cause the system to malfunction.

Main Advanced Power Boot Tools Exit

JumperFree Conguration
USB Conguration

CPU Conguration
Chipset
Onboard Devices Conguration
PCIPnP

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

BIOS SETUP UTILITY

4.4.1 JumperFree Conguration

Advanced

Congure System Frequency/Voltage

Ai Overclocking [Auto]
CPU Ratio Control [Auto]
FSB Strap to North Bridge [Auto]
DRAM Frequency [Auto]
DRAM Command Rate [Auto]
DRAM Timing Control [Auto]
DRAM Static Read Control [Auto]

Transaction Booster [Auto]

CPU Spread Spectrum [Auto]
PCIE Spread Spectrum [Auto]

BIOS SETUP UTILITY

Select Screen

Select Item
Enter Go to Sub Screen
F1 General Help
F10 Save and Exit
ESC Exit

Select the target CPU
frequency, and the
relevant parameters
will be auto-adjusted.
Frequencies higher
than CPU manufacturer
recommends are not
guaranteed to be
stable. If the system
becomes unstable,
return to the default.

Ai Overclocking [Auto]

Allows selection of CPU overclocking options to achieve desired CPU internal

frequency. Selct either one of the preset overclocking conguration options:

Manual

Auto

Standard

4-16 Chapter 4: BIOS setup

Allows you to individually set overclocking parameters.

Loads the optimal settings for the system.

Loads the standard settings for the system.

CPU Ratio Control [Auto]

Conguration 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.

Conguration 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 CPU External Frequency

FSB 1066 266 MHz

FSB 800 200 MHz

PCIE Frequency [Auto]

Allows you to set the PCI Express frequency.

Conguration options: [Auto] [100] [101] ~ [149] [150]

DRAM Frequency [Auto]

Allows you to set the DDR2 operating frequency.

Conguration 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 conguration options of the DRAM Frequency item may differ

according to the CPU and the DIMM(s) you install.

ASUS P5K/EPU

4-17

DRAM Command Rate [Auto]

Conguration options: [Auto] [1T] [2T]

DRAM Timing Control [Auto]

Conguration options: [Auto] [Manual]

The following items appear when you set the DRAM Timing Control item to
[Manual].

CAS# Latency [5 DRAM Clocks]

Conguration options: [3 DRAM Clocks] [4 DRAM Clocks] [5 DRAM Clocks]

[6 DRAM Clocks]

RAS# to CAS# Delay [5 DRAM Clocks]

Conguration options: [3 DRAM Clocks] [4 DRAM Clocks] [5 DRAM Clocks]

[6 DRAM Clocks]~[10 DRAM Clocks]

RAS# Precharge [5 DRAM Clocks]

Conguration options: [3 DRAM Clocks] [4 DRAM Clocks] [5 DRAM Clocks]

[6 DRAM Clocks]~[10 DRAM Clocks]

RAS# Activate Time [15 DRAM Clocks]

Conguration options: [3 DRAM Clocks] [4 DRAM Clocks]~[17 DRAM Clocks]

[18 DRAM Clocks]

RAS# to RAS# Delay [Auto]

Conguration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM

Clocks] [15 DRAM Clocks]

Row Refresh CycleTime [Auto]

Conguration options: [Auto] [20 DRAM Clocks] [25 DRAM Clocks] [30

DRAM Clocks] [35 DRAM Clocks] [42 DRAM Clocks]

Write Recovery Time [Auto]

Conguration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM

Clocks] [15 DRAM Clocks]

Write to Read Delay [Auto]

Conguration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM

Clocks] [15 DRAM Clocks]

Read to Precharge Time [Auto]

Conguration options: [Auto] [1 DRAM Clocks] [2 DRAM Clocks]~[14 DRAM

Clocks] [15 DRAM Clocks]

DRAM Static Read Control [Auto]

Conguration options: [Auto] [Disabled] [Enabled]

4-18 Chapter 4: BIOS setup

Transaction Booster [Auto]

Conguration 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.

ASUS P5K/EPU

4-19

• 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 Yellow Purple Red

CPU PLL Voltage 1.50V~1.78V 1.80V~2.00V 2.02V~2.20V 2.22V~2.78V

FSB Termination Voltage 1.20V~1.38V 1.40V~1.50V N/A N/A

DRAM Voltage 1.80V~1.98V 2.00V~2.20V 2.22V~2.40V 2.42V~3.08V

North Bridge Voltage 1.25V~1.41V 1.43V~1.55V 1.57V~1.73V 1.75V~1.91V

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]

Conguration options: [Auto] [Disabled] [Enabled]

CPU Voltage Reference [Auto]

Conguration options: [Auto] [0.63x] [0.61x] [0.59x] [0.57x]

North Bridge Voltage Reference [Auto]

Conguration options: [Auto] [0.67x] [0.61x]

CPU Spread Spectrum [Auto]

Allows you to enable or disable the CPU spread spectrum.

Conguration options: [Auto] [Disabled]

PCIE Spread Spectrum [Auto]

Allows you to enable or disable the PCIE spread spectrum.

Conguration options: [Auto] [Disabled]

4-20 Chapter 4: BIOS setup

4.4.2 USB Conguration

The items in this menu allows you to change the USB-related features. Select an

item then press <Enter> to display the conguration options.

Advanced

USB Conguration

USB Devices Enabled:

None

USB Functions [Enabled]
USB 2.0 Controller [Enabled]
USB 2.0 Controller Mode [HiSpeed]
BIOS EHCI Hand-off [Enabled]
Port 64/60 Emulation [Disabled]
Legacy USB Support [Auto]

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.

Conguration options: [Disabled] [Enabled]

The following items appear only when you set USB Functions to [Enabled].

BIOS SETUP UTILITY

Options

Disabled
Enabled

Select Screen

Select Item

Change Option

+-

F1 General Help
F10 Save and Exit
ESC Exit

USB 2.0 Controller [Enabled]

Allows you to enable or disable the USB 2.0 controller.

Conguration 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). Conguration 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. Conguration 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. Conguration options: [Disabled] [Enabled]

ASUS P5K/EPU

4-21

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.

Conguration options: [Disabled] [Enabled] [Auto]

4-22 Chapter 4: BIOS setup

4.4.3 CPU Conguration

The items in this menu show the CPU-related information that the BIOS
automatically detects.

Advanced

Congure advanced CPU settings

Manufacturer: Intel
Brand String: Intel(R) Core(TM)2 Duo CPU @ 3.00GHz
Frequency : 3.00GHz
FSB Speed : 1333MHz
Cache L1 : 64 KB
Cache L2 : 4096 KB
CPUID : 6F9
Ratio Status: Unlocked (Max:09, Min:06)
Ratio Actual Value : 9

CPU Ratio Control [Auto]
C1E Support [Enabled]
CPU TM Function [Enabled]
Vanderpool Technology [Enabled]
Execute Disable Bit [Enabled]
Max CPUID Value Limit [Disabled]
Intel(R) SpeedStep(TM) Tech. [Enabled]

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

CPU Ratio Control [Auto]

Conguration 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.

Conguration options: [ 6] [ 7] [ 8] [ 9]

BIOS SETUP UTILITY

Options

Auto
Manual

Select Screen

Select Item

Change Option

+-

F1 General Help
F10 Save and Exit
ESC Exit

C1E Support [Enabled]

Allows you to enable or disable C1E Support.

Conguration options: [Disabled] [Enabled]

CPU TM Function [Enabled]

Conguration options: [Disabled] [Enabled]

Vanderpool Technology [Enabled]

Conguration 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 ag to always return to zero
(0). Conguration options: [Disabled] [Enabled]

ASUS P5K/EPU

4-23

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.

Conguration options: [Disabled] [Enabled]

The following item appears only when you set the CPU Ratio Control to [Auto]

Intel(R) SpeedStep (TM) Tech. [Disabled]

Conguration 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

Advanced Chipset Settings

WARMING: Setting wrong values in below sections
may cause system to malfunction.

North Bridge Conguration

BIOS SETUP UTILITY

Congure North Bridge
features.

North Bridge Chipset Conguration

Advanced

North Bridge Chipset Conguration

Memory Remap Feature [Enabled]
Initiate Graphic Adapter [PEG/PCI]
PEG Port Control [Auto]
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. Conguration options: [Disabled] [Enabled]

Initiate Graphic Adapter [PEG/PCI]

Allows you to decide which graphics controller to use as the primary boot

device. Conguration options: [PCI/PEG] [PEG/PCI]

PEG Port Control [Auto]

Conguration options: [Auto] [Disabled]

The following item appears only when you set PEG Port Control to [Auto]

4-24 Chapter 4: BIOS setup

BIOS SETUP UTILITY

Disabled
Enabled

Options

PEG Port Force x1 [Disabled]

Conguration options: [Enabled] [Disabled]

ASUS C.G.I. Function [Auto]

Allows you to congure ASUS Cross Graphics Impeller.
Conguration options: [Auto] [Enabled] [Disabled]

4.4.5 OnBoard Devices Conguration

Advanced

Onboard Device Conguration

High Denition Audio [Enabled]

Front Panel Type [HD Audio]

Onboard 1394 Controller [Enabled]
Marvell IDE Controller [Enabled]
Marvell GbE LAN [Enabled]
LAN Boot ROM [Disabled]

Serial Port1 Address [3F8/IRQ4]

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

High Denition Audio [Enabled]

Allows you to enable or disable the High Denition Audio Controller.
Conguration 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-denition audio depending on the audio standard that the front
panel audio module supports. Conguration options: [AC97] [HD Audio]

Onboard 1394 Controller [Enabled]

Allows you to disable or enable the onboard 1394 device support.

Conguration options: [Enabled] [Disabled]

BIOS SETUP UTILITY

Enable or Disable
High Denition Audio
Controller

Select Screen

Select Item
+- Change Option
F1 General Help
F10 Save and Exit
ESC Exit

Marvell IDE Controller [Enabled]

Allows you to disable or enable the Marvell IDE device support.

Conguration options: [Enabled] [Disabled]

MarvelI GbE LAN [Enabled]

Conguration options: [Enabled] [Disabled]

LAN Boot ROM [Disabled]

Conguration options: [Disabled] [Enabled]

ASUS P5K/EPU

4-25

Serial Port1 Address [3F8/IRQ4]

Allows you to select the Serial Port1 base address.

Conguration 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

eld values can cause the system to malfunction.

Advanced

Advanced PCI/PnP Settings

WARNING: Setting wrong values in below sections
may cause system to malfunction.

Plug And Play O/S [NO]

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

BIOS SETUP UTILITY

NO: lets the BIOS
congure all the
devices in the system.

YES: lets the operating
system congure Plug
and Play (PnP) devices
not required for boot
if your system has a
Plug and Play operating
system.

Select Screen

Select Item

Change Option

+-

F1 General Help
F10 Save and Exit
ESC Exit

Plug And Play O/S [NO]

When set to [NO], BIOS congures all the devices in the system. When set to

[YES] and if you install a Plug and Play operating system, the operating system

congures the Plug and Play devices not required for boot.
Conguration options: [NO] [YES]

4-26 Chapter 4: BIOS setup

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

conguration options.

Main Advanced Power Boot Tools Exit

Suspend Mode [Auto]
Repost Video on S3 Resume [Disabled]
ACPI Version [Disabled]
ACPI APIC Support [Enabled]

APM Conguration
Hardware Monitor

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

4.5.1 Suspend Mode [Auto]

Allows you to select the Advanced Conguration and Power Interface (ACPI) state

to be used for system suspend.

Conguration 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.

Conguration options: [Disabled] [Enabled]

BIOS SETUP UTILITY

Select the ACPI state
used for System
Suspend.

Select Screen

Select Item

Change Option

+-

F1 General Help
F10 Save and Exit
ESC Exit

4.5.3 ACPI Version [Disabled]

Add additional tables as per ACPI 2.0 specications.
Conguration options: [Disabled] [Enabled]

4.5.4 ACPI APIC Support [Enabled]

Allows you to enable or disable the Advanced Conguration 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.

Conguration options: [Disabled] [Enabled]

ASUS P5K/EPU

4-27

4.5.5 APM Conguration

Power

APM Conguration

Restore on AC Power Loss [Power Off]
Power On By RTC Alarm [Disabled]
Power On By External Modems [Disabled]
Power On By PCI Devices [Disabled]
Power On By PCIE Devices [Disabled]
Power On By PS/2 Keyboard [Disabled]
Power On By PS/2 Mouse [Disabled]

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.

Conguration 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-congurable with set values.
Conguration options: [Disabled] [Enabled]

BIOS SETUP UTILITY

<Enter> to select
whether or not to
restart the system
after AC power loss.

Select Screen

Select Item

Change Option

+-

F1 General Help
F10 Save and Exit
ESC Exit

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.

Conguration 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 rst

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.

Conguration options: [Disabled] [Enabled]

Power On By PCIE Devices [Disabled]

Allows you to enable or disable the PCIE devices to generate a wake event.

Conguration options: [Disabled] [Enabled]

4-28 Chapter 4: BIOS setup

Power On By PS/2 Keyboard [Disabled]

Allows you to disable the Power On by PS/2 keyboard function or set specic 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.

Conguration 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. Conguration options: [Disabled] [Enabled]

4.5.6 Hardware Monitor

Power

Hardware Monitor

CPU Temperature [51ºC/123.5ºF]
MB Temperature [41ºC/105.5ºF]

CPU Fan Speed [1962RPM]
CPU Q-Fan Control [Disabled]
Chassis Fan 1 Speed [N/A]
Chassis Fan 2 Speed [N/A]
Chassis Q-Fan Control [Disabled]
Power Fan Speed [N/A]

VCORE Voltage [ 1.288V]

3.3V Voltage [ 3.296V]
5V Voltage [ 5.094V]
12V Voltage [11.616V]

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

BIOS SETUP UTILITY

CPU Temperature

Select Screen

Select Item

Change Field

+-

F1 General Help
F10 Save and Exit
ESC Exit

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 eld shows [N/A].

CPU Q-Fan Control [Disabled]

Allows you to enable or disable the CPU Q-fan.

Conguration options: [Disabled] [Enabled]

The following item appears only when you enable CPU Q-Fan Control.

ASUS P5K/EPU

4-29

CPU Fan Prole [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.

Conguration 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 eld shows [N/A].

Chassis Q-Fan Control [Disabled]

Allows you to enable or disable the Chassis Q-fan.

Conguration 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.

Conguration 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.

Conguration 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.

4-30 Chapter 4: BIOS setup

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.

Main Advanced Power Boot Tools Exit

Boot Device Priority

Boot Settings Conguration
Security

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

4.6.1 Boot Device Priority

Boot

Boot Device Priority

1st Boot Device [1st FLOPPY DRIVE]

2nd Boot Device [IDE:HDS728080PLAT2]
3rd Boot Device [ATAPI CD-ROM]

BIOS SETUP UTILITY

BIOS SETUP UTILITY

Species the Boot
Device Boot Priority
sequence.

A virtual oppy disk
drive (Floppy Drive B:
) may appear when you
set the DVD-ROM drive
as the rst boot
device.

Select Screen

Select Item
Enter Go to Sub Screen
F1 General Help
F10 Save and Exit
ESC Exit

Species the boot
sequence from the
availabe devices.

A device enclosed
in parenthesis has
been disabled in the
corresponding menu.

Select Screen

Select Item

Change Option

+-

F1 General Help
F10 Save and Exit
ESC 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. Conguration options: [1st FLOPPY DRIVE]
[Hard Drive] [ATAPI CD-ROM] [Disabled]

ASUS P5K/EPU

4-31

4.6.2 Boot Settings Conguration

Boot

Boot Settings Conguration

Quick Boot [Enabled]
Full Screen Logo [Enabled]
AddOn ROM Display Mode [Force BIOS]
Bootup Num-Lock [On]
PS/2 Mouse Support [Auto]
Wait for ‘F1’ if Error [Enabled]
Hit ‘DEL’ Message Display [Enabled]
Interrupt 19 Capture [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. Conguration options: [Disabled] [Enabled]

Full Screen Logo [Enabled]

This allows you to enable or disable the full screen logo display feature.

Conguration 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.

Conguration options: [Force BIOS] [Keep Current]

Bootup Num-Lock [On]

Allows you to select the power-on state for the NumLock.

Conguration options: [Off] [On]

BIOS SETUP UTILITY

Allows BIOS to skip
certain tests while
booting. This will
decrease the time needed
to boot the system.

PS/2 Mouse Support [Auto]

Allows you to enable or disable support for PS/2 mouse.

Conguration 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. Conguration options: [Disabled] [Enabled]

Hit ‘DEL’ Message Display [Enabled]

When set to [Enabled], the system displays the message “Press DEL to run Setup”

during POST. Conguration options: [Disabled] [Enabled]

Interrupt 19 Capture [Disabled]

When set to [Enabled], this function allows the option ROMs to trap Interrupt 19.

Conguration options: [Disabled] [Enabled]

4-32 Chapter 4: BIOS setup

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 conguration options.

Boot

Security Settings

Supervisor Password : Not Installed
User Password : Not Installed

Change Supervisor Password
Change User Password

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:

BIOS SETUP UTILITY

<Enter> to change
password.
<Enter> again to
disabled password.

Select Screen

Select Item
Enter Change
F1 General Help
F10 Save and Exit
ESC Exit

1. Select the

Change Supervisor Password item and press <Enter>.

2. From the password box, type a password composed of at least six letters
and/or numbers, then press <Enter>.

3. Conrm 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.

ASUS P5K/EPU

4-33

Boot

Security Settings

Supervisor Password : Installed
User Password : Installed

Change Supervisor Password
User Access Level [Full Access]
Change User Password
Clear User Password
Password Check [Setup]

v02.61 (C)Copyright 1985-2007, American Megatrends, Inc.

BIOS SETUP UTILITY

<Enter> to change
password.
<Enter> again to
disabled password.

Select Screen

Select Item
Enter Change
F1 General Help
F10 Save and Exit
ESC Exit

User Access Level [Full Access]

This item allows you to select the access restriction to the Setup items.

Conguration 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 eld.

[Limited] allows changes only to selected elds, such as Date and Time.

[Full Access] allows viewing and changing all the elds 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. Select the

2. On the password box that appears, type a password composed of at least six
letters and/or numbers, then press <Enter>.

3. Conrm 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.

Change User Password item and press <Enter>.

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. Conguration options: [Setup] [Always]

4-34 Chapter 4: BIOS setup

4.7 Tools menu

The Tools menu items allow you to congure options for special functions. Select

an item then press <Enter> to display the sub-menu.

Main Advanced Power Boot Tools Exit

ASUS EZ Flash 2

ASUS O.C. Prole
ASUS Ai Net 2

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 conrmation

message appears. Use the left/right arrow key to select between [Yes] or [No],

then press <Enter> to conrm 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
DATE: 09/13/07

PATH: A:\

A:

BIOS SETUP UTILITY

BOARD: Unknown
VER: Unknown
DATE: Unknown

Update ROM

Press ENTER to run
the utility to select
and update BIOS.
This utility doesn't
support :

1.NTFS format

Select Screen

Select Item

Change Field

+-

Enter Go to Sub Screen
F1 General Help
F10 Save and Exit
ESC Exit

[Enter] Select or Load [B] Backup [ESC] Exit

[Tab] Switch [Up/Down/Home/End] Move

ASUS P5K/EPU

Note

4-35

4.7.2 ASUS Ai Net 2

Tools

Pair Status Length

1-2 N/A
3-6 N/A
4-5 N/A
7-8 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). Conguration options: [Disabled] [Enabled]

BIOS SETUP UTILITY

Check LAN cable during

POST.

4-36 Chapter 4: BIOS setup