ASUS 5B-VM User Manual

P5B-VM

Motherboard

E2642

First Edition
July 2006

Copyright © 2006 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

Notices ......................................................................................................... vi

Safety information ..................................................................................... vii

P5B-VM specications summary ............................................................... x

Chapter 1: Product introduction

1.1 Welcome! ...................................................................................... 1-2

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

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

1.3.1 Product highlights ...........................................................

1.3.2 Innovative ASUS features ..............................................

1.4 Before you proceed .....................................................................

1.5 Motherboard overview .................................................................

1.5.1 Motherboard layout .........................................................

1.5.2 Placement direction ........................................................

1.5.3 Screw holes ....................................................................

1.6 Central Processing Unit (CPU) .................................................

1.6.1 Overview ........................................................................

1.6.2 Installing the CPU .........................................................

1.6.3 Installing the heatsink and fan ......................................

1.7 System memory .........................................................................

1.7.1 Overview .......................................................................

1.7.2 Memory congurations ..................................................

1.7.3 Installing a DIMM ..........................................................

1.7.4 Removing a DIMM ........................................................

1.8 Expansion slots ..........................................................................

1.8.1 Installing an expansion card .........................................

1.8.2 Conguring an expansion card .....................................

1.8.3 PCI slots ........................................................................

1.8.4 PCI Express x4 slot .......................................................

1.8.5 PCI Express x16 slot .....................................................

1.9 Jumpers ......................................................................................

1.10 Connectors .................................................................................

1.10.1 Rear panel connectors ..................................................

1.10.2 Internal connectors .......................................................

1-2

1-2

1-4

1-4

1-6

1-7

1-7

1-7

1-8

1-11

1-11

1-12

1-14

1-18

1-18

1-18

1-22

1-22

1-23

1-23

1-23

1-25

1-25

1-25

1-26

1-28

1-28

1-30

iii

Contents

Chapter 2: BIOS setup

2.1 Managing and updating your BIOS ............................................ 2-2

2.1.1 Creating a bootable oppy disk .......................................

2.1.2 ASUS EZ Flash 2 utility ...................................................

2.1.3 AFUDOS utility ................................................................

2.1.4 ASUS CrashFree BIOS 3 utility ......................................

2.1.5 ASUS Update utility ........................................................

2.2 BIOS setup program ..................................................................

2.2.1 BIOS menu screen ........................................................

2.2.2 Menu bar .......................................................................

2.2.3 Navigation keys .............................................................

2.2.4 Menu items ...................................................................

2.2.5 Sub-menu items ............................................................

2.2.6 Conguration elds .......................................................

2.2.7 Pop-up window .............................................................

2.2.8 Scroll bar .......................................................................

2.2.9 General help .................................................................

2.3 Main menu ..................................................................................

2.3.1 System Time .................................................................

2.3.2 System Date .................................................................

2.3.3 Legacy Diskette A ........................................................

2.3.4 Primary, Secondary, Third, Fourth IDE Master/Slave ............

2.3.5 IDE Conguration ..........................................................

2.3.6 System Information .......................................................

2.4 Advanced menu .........................................................................

2.4.1 CPU Conguration ........................................................

2.4.2 Chipset .........................................................................

2.4.3 Onboard Devices Conguration ....................................

2.4.4 PCI PnP ........................................................................

2.5 Power menu ................................................................................

2.5.1 ACPI 2.0 Support .........................................................

2.5.2 ACPI APIC Support .......................................................

2.5.3 APM Conguration ........................................................

2.5.4 Hardware Monitor .........................................................

2-2

2-3

2-4

2-6

2-8

2-11

2-12

2-12

2-12

2-13

2-13

2-13

2-13

2-13

2-13

2-14

2-14

2-14

2-14

2-15

2-16

2-17

2-18

2-18

2-19

2-24

2-26

2-27

2-27

2-27

2-28

2-29

iv

Contents

2.6 Boot menu .................................................................................. 2-30

2.6.1 Boot Device Priority ......................................................

2.6.2 Boot Settings Conguration ..........................................

2.6.3 Security .........................................................................

2.7 Exit menu ....................................................................................

Chapter 3: Software support

3.1 Installing an operating system ................................................... 3-2

3.2 Support CD information ..............................................................

3.2.1 Running the support CD .................................................

3.2.2 Drivers menu ...................................................................

3.2.3 Utilities menu ..................................................................

3.2.4 Make disk menu ..............................................................

3.2.5 Manual ............................................................................

3.2.6 ASUS Contact information ..............................................

3.3 Software information ...................................................................

2-30

2-31

2-32

2-35

3-2

3-2

3-3

3-4

3-5

3-6

3-6

3-7

v

Notices

Federal Communications Commission Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:

•

This device may not cause harmful interference, and

•

This device must accept any interference received including interference that
may cause undesired operation.

This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio

frequency energy and, if not installed and used in accordance with manufacturer’s

instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:

•

Reorient or relocate the receiving antenna.

•

Increase the separation between the equipment and receiver.

•

Connect the equipment to an outlet on a circuit different from that to which the
receiver is connected.

•

Consult the dealer or an experienced radio/TV technician for help.

The use of shielded cables for connection of the monitor to the graphics card is

required to assure compliance with FCC regulations. Changes or 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.

vi

Safety information

Electrical safety

•

To prevent electrical shock hazard, disconnect the power cable from the

electrical outlet before relocating the system.

•

When adding or removing devices to or from the system, ensure that the
power cables for the devices are unplugged before the signal cables are
connected. If possible, disconnect all power cables from the existing system
before you add a device.

•

Before connecting or removing signal cables from the motherboard, ensure
that all power cables are unplugged.

•

Seek professional assistance before using an adpater or extension cord.
These devices could interrupt the grounding circuit.

•

Make sure that your power supply is set to the correct voltage in your area.
If you are not sure about the voltage of the electrical outlet you are using,
contact your local power company.

•

If the power supply is broken, do not try to 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.

vii

About this guide

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

the motherboard.

How this guide is organized

This manual contains the following parts:

• Chapter 1: Product introduction

This chapter describes the features of the motherboard and the new
technology it supports. It also 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.

• Chapter 2: 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 3: Software support

This chapter describes the contents of the support CD that comes with the
motherboard package.

• 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.

viii

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 /iP5BVM.ROM

ix

P5B-VM specications summary

CPU LGA775 socket for Intel® Core™2 Extreme / Core™2

Chipset Northbridge: Intel® G965 with Intel® Clear Video Technology

System Bus 1066 / 800 / 533 MHz

Memory 4 x DIMM, max. 8GB, DDR2 800 / 667 / 533 MHz, non-ECC,

Expansion Slots 1 x PCI-E x16 slot

VGA Intel® Graphics Media Accelerator X3000 (Intel® GMA

Storage Southbridge Intel

LAN Realtek® RTL8111B PCIE Gigabit LAN controller

Audio ADI® AD 1988 8-channel High Denition Audio CODEC

IEEE 1394 TI® 1394a controller supports 2 x IEEE 1394a ports (one

USB 10 x USB2.0 ports (6 ports at mid-board, 4 ports at back

Duo / Pentium® Extreme / Pentium® D / Pentium® 4 /
Celeron® D Processors
Compatible with Intel® 05B/05A/06 processors
Intel® Hyper-Threading Technology ready
Refer to www.asus.com for Intel CPU support list

Southbridge: Intel® ICH8

un-buffered memory
Dual channel memory architecture

1 x PCI-E x4 slot
2 x PCI slots

X3000) integrated

High Denition Video Processing with max. resolutions to
Max resolution to 2048 x 1536 bpp(@75Hz)

Max. shared memory of 256MB
Support Microsoft® DX 9, OpenGL 1.5, Pixel Shader 3.0

®

- 4 x SATA 3.0 Gb/s ports.

JMicron® JMB363 PATA and SATA controller

- 1 x UltraDMA 133/100/66 for up to 2 PATA devices

- 1 x Internal SATA 3.0 Gb/s port

- 1 x External SATA 3.0 Gb/s port

- RAID 0, RAID 1 and JBOD conguration

Support Jack-Sensing, Enumeration, Multi-streaming and
Jack-Retasking
S/PDIF out interface

at midboard; one at back panel)

panel)

ICH8

(continued on the next page)

x

P5B-VM specications summary

ASUS AI Lifestyle

Features

Other Features ASUS MyLogo 2

Rear panel 1 x PS/2 keyboard port

Internal connectors 3 x USB 2.0 connectors support six additional USB 2.0 ports

BIOS features 8 Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM2.0,

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

Support CD contents Device drivers

Form factor Micro-ATX form factor: 9.6 in x 9.6 in (24.5 cm x 24.5 cm)

*Specications are subject to change without notice.

ASUS Quiet Thermal Solution:

- ASUS AI Gear

- ASUS AI Nap

- ASUS Advanced Q-Fan
ASUS Crystal Sound

-Noise Filter
ASUS EZ DIY:

- ASUS Q-Connector

- ASUS CrashFree BIOS 3

- ASUS EZ Flash 2

ASUS C.P.R. (CPU Parameter Recall)

1 x PS/2 mouse port
1 x Parallel port
1 x VGA port
1 x External Serial ATA port
1 x IEEE1394a
1 x LAN (RJ-45) port
4 x USB 2.0/1.1 ports
8-channel audio ports

1 x Floppy disk drive connector
1 x IDE connector for two devices
5 x Serial ATA connectors
1 x CPU / 1 x Chassis / 1 x Power fan connectors
1 x COM connector
1 x IEEE1394a connector
1 x S/PDIF Out connector
1 x Chassis intrusion connector
1 x Front panel audio connector
1 x CD audio in connector
1 x 24-pin ATX power connector
1 x 4-pin ATX 12 V power connector
1 x HD Audio Digital Header
System panel connector

SM BIOS 2.3, ACPI 2.0a, ASUS EZ Flash 2, ASUS
CrashFree BIOS 3

ASUS PC Probe II
ASUS Update
Anti-virus software (OEM version)

xi

xii

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

Product

1

introduction

1.1 Welcome!

Thank you for buying an ASUS® P5B-VM 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 P5B-VM
Cables 2 x Serial ATA cable kit
1 x Ultra DMA 133/100/66 cable
1 x Floppy disk drive cable
Accessories I/O shield
1 x ASUS Q-Connector Kit (USB, 1394, system
panel; Retail version only)
Application CD ASUS motherboard support CD
Documentation User guide

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

1.3 Special features

1.3.1 Product highlights

Green ASUS

This motherboard and its packaging comply with the European Union’s Restriction
on the use of Hazardous Substances (RoHS). This is in line with the ASUS vision

of creating environment-friendly and recyclable products/packaging to safeguard
consumers’ health while minimizing the impact on the environment.

Intel® Core™2 Processor Ready

This motherboard supports the latest Intel® Core™2 processor in the LGA775
package. With the new Intel® Core™ microarchitecture technology and 1066 /

800 MHz FSB, Intel® Core™2 processor is one of the most powerful and energy
efcient CPU in the world.

1-2 Chapter 1: Product introduction

Intel G965 Chipset

The Intel® G965 Express Chipset boosts your gaming and multi-media experience
with the integrated graphics engine Intel® Graphics Media Accelerator X3000.
Delivering breakthrough increases in 3D, 2D, and video capabilities, the integrated
chipset meets the changing display requirements of visually rich applications. The

Intel® G965 Express features the Intel® Clear Video Technology, which trailblazes
new standards in high-denition video, crisp imaging, and accurate color control.

DDR2 memory support

The motherboard supports DDR2 memory that features data transfer rates of

800/667/533 MHz to meet the higher bandwidth requirements of the latest

3D graphics, multimedia, and Internet applications. The dual-channel DDR2
architecture doubles the bandwidth of your system memory to boost system
performance, eliminating bottlenecks with peak bandwidths of up to 12.8 GB/s.

Without restriction to the memory size across the two channels, the motherboard
allows you to install DIMMs with different memory size and enjoy dual-channel

feature at the same time. See pages 1-18 for details.

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 1-28 and 1-33 for details.

Serial ATA 3.0 Gb/s technology and SATA on the go

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. The external
SATA port located at the back I/O provides smart setup and hot-plug functions.
Easily backup photos, videos and other entertainment contents to external devices.
See pages 1-28 and 1-32 for details.

S/PDIF digital sound ready

The motherboard supports the S/PDIF-out (SONY-PHILIPS Digtal Interface)
function through the S/PDIF interface at mid-board. It allows to transfer digital
audio without converting to analog format and keeps the best signal quality. See
pages 1-30 for details.

ASUS P5B-VM 1-3

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, jack-sensing feature, retasking functions and

multi-streaming technology 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 page 1-36 for details.

1.3.2 ASUS AI Lifestyle features

ASUS Quiet Thermal Solution

ASUS Quiet Thermal solution makes system more stable and enhances the
overclocking capability.

AI Gear

AI Gear provides four modes that adjust the CPU frequency and Vcore

voltage minimizing system noise and power consumption. You can choose

the mode that best suits your computing needs. See pages 3-4 and 3-8 for
details.

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 pages 3-4 and 3-9
for details.

ASUS Advanced Q-Fan

The ASUS advanced Q-Fan technology on P5B Series is powered by Intel Quiet

System Technology; It makes the change of fan speed more smoothly. It’s better
in fan use, and efciently reduces the noise caused by fans’ abruptly speeding

up. Moreover, Advanced Q-Fan has a better control over a constant temperature
system environment. See page 2-30 for details.

ASUS Crystal Sound

This feature can enhance 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 3-8 for details.

1-4 Chapter 1: Product introduction

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-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 page 1-39 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 2-6 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 page 2-3 for details.

1.3.3 ASUS Special features

ASUS MyLogo2™

This feature allows you to convert your favorite photo into a 256-color boot logo for
a more colorful and vivid image on your screen. See page 2-31 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.

Due to chipset behavior, AC power off is required prior using C.P.R. function.

ASUS P5B-VM 1-5

1.4 Before you proceed

R

P5B-VM

P5B-VM

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 that lights up to indicate
that the system is ON, in sleep mode, or in soft-off mode. This is a reminder
that you should shut down the system and unplug the power cable before
removing or plugging in any motherboard component. The illustration below
shows the location of the onboard LED.

1-6 Chapter 1: Product introduction

R

P5B-VM

1.5 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.

1.5.1 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.

1.5.2 Screw holes

Place eight (8) 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

ASUS P5B-VM 1-7

24.5cm (9.6in)

24.5cm (9.6in

)

LGA775

PCIEX16

PCI1

PCI2

PCIEX4_1

EATXPWR

PWR_FAN

SPDIF_OUT

CD

CHA_FAN1

KBPWR

CPU_FAN

Super I/O

DDR2 DIMM_A1 (64 bit,240-pin module)

DDR2 DIMM_A2 (64 bit,240-pin module)

DDR2 DIMM_B1 (64 bit,240-pin module)

DDR2 DIMM_B2 (64 bit,240-pin module)

Intel G965MCH

Intel ICH8

FLOPPY

COM1

SATA1

SATA_RAID1

SATA2

SATA3

SATA4

PANEL

CHASSIS

CLRTC

USB910USB78USB56

PRI_EIDE

ADH

IE1394_2

AAFP

AD1988

RTL8111B

TSB43AB22A

JMicron

JMB363

8Mb BIOS

CR2032 3V
Lithium Cell

CMOS Power

AUDIO

LAN_USB34

1394_USB12

PARALLE PORT

PS/2KBMS
T: Mouse
B: Keyboard

ATX12V

R

P5B-VM

SB_PWR

ESATA

VGA

1.5.3 Motherboard layout

Refer to 1.10 Connectors for more information about rear panel connectors and
internal connectors.

1-8 Chapter 1: Product introduction

1.5.4 Layout contents

Slots Page

1. DDR2 DIMM slots 1-18

2. PCI slots 1-25

3. PCI Express x4 slots 1-25

4. PCI Express x16 slot 1-25

Jumper Page

1. Clear RTC RAM (3-pin CLRTC) 1-26

Rear panel connectors Page

1. PS/2 mouse port (green) 1-28

2. Parallel port 1-28

. VGA port 1-28

3

4. USB 2.0 ports 1 and 2 1-28

5. LAN (RJ-45) port 1-28

6. Rear Speaker Out port (black) 1-28

7. Center/Subwoofer port (orange) 1-28

8. Line In port (light blue) 1-28

9. Line Out port (lime) 1-28

10. Microphone port (pink) 1-28

11. Side Speaker Out port (gray) 1-28

12. USB 2.0 ports 3 and 4 1-29

13. External SATA port 1-29

14. IEEE 1394a port 1-28

15. PS/2 keyboard port (purple) 1-29

ASUS P5B-VM 1-9

Internal connectors Pag

1. Floppy disk drive connector (34-1 pin FLOPPY) 1-30

2. Digital Audio connector (4-1 pin SPDIF_OUT) 1-30

3. IDE connector (40-1 pin PRI_IDE) 1-31

4. ICH8 Serial ATA connectors (7-pin SATA1, SATA2,SATA3, SATA4) 1-32

5. JMicron

®

JMB363 Serial ATA RAID connector (7-pin SATA_RAID) 1-33

6. IEEE 1394a port connector (10-1 pin IE1394_2) 1-33

7. USB connectors (10-1 pin USB56, USB 78, USB910) 1-34

8. Optical drive audio connector (4-pin CD) 1-34

9. CPU, chassis, and power fan connectors (4-pin CPU_FAN, 1-35
3-pin CHA_FAN1, 3-pin CHA_FAN2, 3-pin PWR_FAN)

10. Serial port connector (10-1 pin COM1) 1-35

11. Chassis intrusion connector (4-1 pin CHASSIS) 1-36

12. Front panel audio connector (10-1 pin AAFP) 1-36

13. ATX power connectors (24-pin EATXPWR, 4-pin EATX12V) 1-37

14. System panel connector (20-8 pin PANEL) 1-38

e

1-10 Chapter 1: Product introduction

1.6 Central Processing Unit (CPU)

The motherboard comes with a surface mount LGA775 socket designed for
the Intel® Core™2/Pentium® D/Pentium® 4/Pentium® Extreme and Celeron

®

processors.

•

Make sure the AC power is off before you install the CPU.

• If installing a dual-core CPU, connect the chassis fan cable to the
CHA_FAN connector to ensure system stability.

•

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.

D

ASUS P5B-VM 1-11

1.6.1 Installing the CPU

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P5B-VM

P5B-VM

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

A

Load lever

B

This side of the socket box

should face you.

To prevent damage to the socket pins, do not remove the PnP cap unless you
are installing a CPU.

3. Lift the load lever in the direction of
the arrow to a 135º angle.

1-12 Chapter 1: Product introduction

PnP cap

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.

ASUS P5B-VM 1-13

1.6.2 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

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.)

1-14 Chapter 1: Product introduction

Fastener

2. Push down two fasteners at a time in

R

P5B-VM

P5B-VM

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.

ASUS P5B-VM 1-15

1.6.3 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.

1-16 Chapter 1: Product introduction

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.

ASUS P5B-VM 1-17

1.7 System memory

1.7.1 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

1.7.2 Memory congurations

You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered non-ECC DDR2
DIMMs into the DIMM sockets.

• You may install varying memory sizes in Channel A and Channel B. The
system maps the total size of the lower-sized channel for the dual-channel
conguration. Any excess memory from the higher-sized channel is then

mapped for single-channel operation.

• Always install DIMMs with the same CAS latency. For optimum compatibility,
it is recommended that you obtain memory modules from the same vendor.

• If you install four 1 or 2GB memory modules, the system may only recognize

less than 3GB because the address space is reserved for other critical
functions. This limitation appears on Windows® XP 32-bit operation system
which does not support Physical Address Extension (PAE).

®

• If you install Windows
than 3GB is recommended.

• This motherboard does not support memory modules made up of 128 Mb
chips or double sided x16 memory modules.

1-18 Chapter 1: Product introduction

XP 32-bit operation system, a total memory of less

Notes on memory limitations

• Due to chipset limitation, this motherboard can only support up to
8 GB on the operating systems listed below. You may install a maximum of
2 GB DIMMs on each slot, but only DDR2-533 and DDR2-667 2 GB density

modules are available for this conguration.

32-bit 64-bit

Windows® 2000 Advanced Windows® XP Professional x64
Server Edition

• Some old-version DDR2-800/667 DIMMs may not match Intel®’s
On-Die-Termination (ODT) requirement and will automatically downgrade
to run at DDR2-533. If this happens, contact your memory vendor to check
the ODT value.

• Due to chipset limitation, DDR2-800 with CL=4 will be downgraded to run
at DDR2-667 by default setting. If you want to operate with lower latency,
adjust the memory timing manually.

• Due to chipset limitation, DDR2-667 with CL=3 will be downgraded to run
at DDR2-533 by default setting. If you want to operate with lower latency,
adjust the memory timing manually. There will be 8MB reduction in total
memory when enabling ASUS Thermostat function under Single Channel
mode, and 16MB reduction under Dual Channel Mode.

• The total memory may has 8MB reduction under Single Channel mode, and
16MB reduction under Dual Channel mode because the address space is
reserved for Intel® Quiet System Technology.

ASUS P5B-VM 1-19

Qualied Vendors Lists (QVL)

DDR2 800

Siz e Vend or Ch ip No. Side(s) Par t N o. A B C

512MB KINGSTON K4T51083QC SS KVR800D2N5/512 • • •

1024MB KINGSTON K4T51083QC DS KVR800D2N5/1G • •

512MB Qimonda HYB18T256800AF25F DS HYS64T64020HU-25F-A • •

256MB Qimonda HYB18T512160BF-25F SS HYS64T32000HU-25F-B • •

512MB Qimonda HYB18T512800BF25F SS HYS64T64000HU-25F-B • •

1024MB Qimonda HYB18T512800BF25F DS HYS64T128020HU-25F-B • • •

512MB SAMSUNG EDD339XX SS M378T6553CZ3-CE7 • • •

256MB SAMSUNG K4T51163QC-ZCE7 SS M378T3354CZ3-CE7 • •

512MB Hynix HY5PS12821BFP-S5 SS HYMP564U64BP8-S5 • •

1024MB Hynix HY5PS12821BFP-S5 DS HYMP512U64BP8-S5 •

512MB MICRON 5JAIIZ9DQQ SS MT8HTF6464AY-80EA3 • •

1024MB MICRON 5JAIIZ9DQQ DS MT16HTF12864AY-80EA3 • •

512MB MICRON 5ZD22D9GKX SS MT8HTF6464AY-80ED4 •

1024MB MICRON 5ZD22D9GKX DS MT16HTF12864AY-80ED4 • •

512MB MICRON 6CD22D9GKX SS MT8HTF6464AY-80ED4 • •

1024MB MICRON 6CD22D9GKX DS MT16HTF12864AY-80ED4 •

1024MB CORSAIR Heat-Sink Package DS CM2X1024-6400C4 •

512MB Crucial Heat-Sink Package SS BL6464AA804.8FD • •

1024MB Crucial Heat-Sink Package DS BL12864AA804.16FD •

DIMM support

DDR2 667

Siz e Vend or Chip No Si de( s) Par t N o. A B C

512MB KINGSTON E5108AE-6E-E SS KVR667D2N5/512 • •

1024MB KINGSTON E5108AE-6E-E DS KVR667D2N5/1G • •

512MB KINGSTON E5108AE-6E-E SS KVR667D2E5/512 • •

256MB KINGSTON HYB18T256800AF3 SS KVR667D2N5/256 • •

256MB Qimonda HYB18T512160AF-3S SS HYS64T32000HU-3S-A • •

512MB Qimonda HYB18T512800AF3S SS HYS64T64000HU-3S-A • •

1024MB Qimonda HYB18T512800AF3S DS HYS64T128020HU-3S-A • •

256MB Qimonda HYB18T512160BF-3S SS HYS64T32000HU-3S-B • •

512MB Qimonda HYB18T512800BF3S SS HYS64T64000HU-3S-B • •

1024MB Qimonda HYB18T512800BF3S DS HYS64T128020HU-3S-B

256MB SAMSUNG K4T51163QC-ZCE6 SS M378T3354CZ0-CE6 • •

512MB SAMSUNG ZCE6K4T51083QC SS M378T6553CZ0-CE6

1024MB SAMSUNG ZCE6K4T51083QC DS M378T2953CZ0-CE6 • •

512MB Hynix HY5PS12821AFP-Y5 SS HYMP564U64AP8-Y5 • •

512MB Hynix HY5PS12821AFP-Y4 SS HYMP564U64AP8-Y4 • •

256MB ELPIDA E2508AB-6E-E SS EBE25UC8ABFA-6E-E • •

512MB ELPIDA E5108AE-6E-E SS EBE51UD8AEFA-6E-E • •

512MB A-DATA AD29608A8B-3EG SS M20AD5Q3H3163J1C52 • •

512MB Transcend E5108AE-6E-E SS TS64MLQ64V6J • •

1024MB Transcend E5108AE-6E-E DS TS128MLQ64V6J

1024MB Transcend J12Q3AB-6 DS JM388Q643A-6

DIMM support

•

•

•

•

•

1-20 Chapter 1: Product introduction

DDR2 533

Siz e Vend or Ch ip No. Side(s) Par t N o. A B C

256MB KINGSTON E5116AF-5C-E SS KVR533D2N4/256 • •

512MB KINGSTON HYB18T512800AF37 SS KVR533D2N4/512 • •

1024MB KINGSTON 5YDIID9GCT DS KVR533D2N4/1G • •

256MB Qimonda HYB18T512160AF-3.7 SS HYS64T32000HU-3.7-A • •

512MB Qimonda HYB18T512800AF37 SS HYS64T64000HU-3.7-A • •

1024MB Qimonda HYB18T512800AF37 DS HYS64T128020HU-3.7-A • •

256MB Qimonda HYB18T5121608BF-3.7 SS HYS64T32000HU-3.7-B • • •

512MB Qimonda HYB18T512800BF37 SS HYS64T64000HU-3.7-B • • •

1024MB Qimonda HYB18T512800BF37 DS HYS64T128020HU-3.7-B •

512MB Hynix HY5PS12821F-C4 SS HYMP564U648-C4 •

512MB Hynix HY5PS12821F-C4(ECC) SS HYMP564U728-C4

1024MB Hynix HY5PS12821F-C4 DS HYMP512U648-C4 • •

512MB Hynix HY5PS12821AFP-C3 SS HYMP564U64AP8-C3 • •

1024MB Hynix HY5PS12821AFP-C3 DS HYMP512U64AP8-C3 • •

512MB ELPIDA E5108AB-5C-E SS EBE51UD8ABFA-5C-E • •

256MB Apacer E5116AB-5C-E SS 78.81077.420 • •

512MB KINGMAX E5108AE-5C-E SS KLBC28F-A8EB4 • • •

1024MB KINGMAX E5108AE-5C-E DS KLBD48F-A8EB4 •

512MB KINGMAX KKEA88E4AAK-37 SS KLBC28F-A8KE4 •

1024MB KINGMAX 5MB22D9DCN DS KLBD48F-A8ME4 •

DIMM support

Visit the ASUS website (www.asus.com) for the latest QVL.

Side(s): SS - Single-sided DS - Double-sided

DIMM support:

A - Supports one module inserted into any slot as Single-channel memory conguration.
B - Supports one pair of modules inserted into either the blue slots or the black slots as

one pair of Dual-channel memory conguration.

C - Supports three modules inserted into both the blue and black slots as two pairs of

Dual-channel memory conguration.

ASUS P5B-VM 1-21

1.7.3 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.

1.7.4 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.

2. Remove the DIMM from the socket

1-22 Chapter 1: Product introduction

1

.

DDR2 DIMM notch

1

1.8 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.

1.8.1 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.

1.8.2 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 P5B-VM 1-23

1.8.3 Interrupt assignments

Standard interrupt assignments

IRQ Priority Standard Function

0 1 System Timer
1 2 Keyboard Controller
2 — Re-direct to IRQ#9
3 12 IRQ holder for PCI steering*
4 13 Communications Port (COM1)*
5 14 IRQ holder for PCI steering*
6 15 Floppy Disk Controller
7 16 Printer Port (LPT1)*
8 3 System CMOS/Real Time Clock
9 4 ACPI*
10 5 SMBus Controller*
11 6 IRQ holder for PCI steering*
12 7 PS/2 Compatible Mouse Port*
13 8 Numeric Data Processor
14 9 IDEIRQ (legacy mode, combined mapped as primary),

SMasterATA1 (Master), SATA3 (Secondary)
15 10 IDEIRQ (legacy mode, combined mapped as secondary),

SATA2 (Master), SATA4 (Secondary)

* These IRQs are usually available for PCI devices.

IRQ assignments for this motherboard

A B C D E F G H

PCI1 shared — — — — — — —
PCI2 — shared — — — — — —
PCIEX16_1 shared — — — — — — —
PCIEX4_1 shared — — — — — — —
On-board ESATA, SATA_RAID shared — — — — — — —
On-board PRI_IDE shared — — — — — — —
On-board HD Audio (AD1988) — — — — — — shared —
On-board GbEthernet (RTL8111B) — shared — — — — — —
USB 2.0 EHCI#1 — — — — — — — shared

USB 2.0 EHCI#2 — — — — — — shared —
USB12 UHCI#1 — — — — — — — shared
USB34 UHCI#2 — — — shared — — — —
USB56 UHCI#3 — — shared — — — — —
USB78 UHCI#4 shared — — — — — — —
USB910 UHCI#5 shared — — — — — — —
SATA1, SATA2 (ICH8) — — shared — — — — —
SATA3, SATA4 (ICH8) — — — shared — — — —

1-24 Chapter 1: Product introduction

1.8.4 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.

1.8.5 PCI Express x4 slots

This motherboard supports PCI Express
x4 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 x4 slot.

2.5.6 PCI Express x16 slot

This motherboard supports PCI Express
x16 graphic cards that comply with the

PCI Express specications. The gure

shows a graphics card installed on the
PCI Express x16 sloti

ASUS P5B-VM 1-25

1.9 Jumper

R

P5B-VM

P5B-VM

Clear RTC RAM

CLRTC

Normal

Clear CMOS

(Default)

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!

• 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 limitation, AC power off is required prior using C.P.R.
function. You must turn off and on the power supply or unplug and plug the
power cord before reboot the system.

1-26 Chapter 1: Product introduction

2. Keyboard power (3-pin KBPWR)

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P5B-VM

P5B-VM

Keyboard Power Setting

(Default)

+5V

+5VSB

KBPWR

2

3

1

2

This jumper allows you to enable or disable the keyboard wake-up feature.
Set this jumper to pins 2-3 (+5VSB) to wake up the computer when you press
a key on the keyboard (the default is the Space Bar). This feature requires
an ATX power supply that can supply at least 1A on the +5VSB lead, and a
corresponding setting in the BIOS.

ASUS P5B-VM 1-27

1.10 Connectors

3

12

5

7

1 2

15

4 6

8

9

1011

14

13

1.10.1 Rear panel connectors

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

Parallel port. This 25-pin port connects a parallel printer, a scanner, or other

2.

devices.

3. IEEE 1394a port.

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

4. LAN (RJ-45) port.

allows Gigabit connection to a Local Area Network (LAN) through a network
hub. Refer to the table below for the LAN port LED indications.

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

Supported by Realtek® Gigabit LAN controller, this port

ACT/LINK

LED

LAN port

SPEED

LED

5. Rear Speaker Out port (black).

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

6. Center/Subwoofer port (orange).

speakers.

7. Line In port (light blue).

other audio sources.

8. Line Out port (lime).

4-channel, 6-channel, and 8-channel conguration, the function of this port

becomes Front Speaker Out.

9. Microphone port (pink).

10 Side Speaker Out port (gray).

8-channel audio conguration.

This port connects a headphone or a speaker. In

This port connects the rear speakers in a

This port connects the center/subwoofer

This port connects the tape, CD, DVD player, or

This port connects a microphone.

This port connects the side speakers in an

1-28 Chapter 1: Product introduction

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

11. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports

are available for connecting USB 2.0 devices.

12. USB 2.0 ports 3 and 4.

These two 4-pin Universal Serial Bus (USB) ports

are available for connecting USB 2.0 devices.

13. VGA port

. This port is for a VGA monitor or other VGA-compatible devices.

14. External SATA port. This port connects to an external SATA box or a Serial

ATA port multiplier. This port supports a Serial ATA hard disk drive that you

can combine with an external Serial ATA 3.0 Gb/s device to congure a RAID

0, RAID 1, or JBOD set through the onboard JMicron SATA RAID controller.

The external SATA port supports external Serial ATA

3.0 Gb/s devices. Longer cables support higher power requirements to deliver
signal up to two meters away, and enables improved hot-swap function.

• Before creating a RAID set using Serial ATA hard disks, make sure that you
have connected the Serial ATA signal cable and installed Serial ATA hard

disk drives; otherwise, you cannot enter the JMicron RAID utility and SATA

BIOS setup during POST.

• If you intend to create a RAID conguration using this connector, set the

JMicron SATA Controller Mode item in the BIOS to [RAID]. See section

“4.4.5 Onboard Device Conguration” for details.

• DO NOT insert a different connector to this port.

• DO NOT unplug the external Serial ATA box when a RAID 0 or JBOD is congured.

15. PS/2 keyboard port (purple). This port is for a PS/2 keyboard.

ASUS P5B-VM 1-29

1.10.2 Internal connectors

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P5B-VM

P5B-VM

Floppy Disk Drive Connector

PIN 1

NOTE:

Orient the red markings on

the floppy ribbon cable to PIN 1.

FLOPPY

R

P5B-VM

P5B-VM D

igital Audio Connector

+5V

SPDIFOUT

GND

SPDIF_OUT

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.

Digital Audio connector (4-1 pin SPDIF_OUT)

This connector is for the S/PDIF audio module to allow digital sound output.
Connect one end of the S/PDIF audio cable to this connector and the other
end to the S/PDIF module.

The S/PDIF out module is purchased separately.

1-30 Chapter 1: Product introduction

2. IDE connector (40-1 pin PRI_EIDE)

R

P5B-VM

P5B-VM

IDE Connector

NOTE: Orient the red markings

(usually zigzag) on the ID

ribbon cable to PIN 1.

PRI_EIDE

PIN1

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

Black

Slave Gray

Master Master Black or gray

Slave Slave

• 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.

ASUS P5B-VM 1-31

3. ICH8 Serial ATA connectors (7-pin SATA1, SATA2, SATA3, SATA4)

R

P5B-VM

P5B-VM

SATA Connectors

GND

RSATA_TXP1

RSATA_TXN1

GND

RSATA_RXP1

RSATA_RXN1

GND

GND

RSATA_TXP2

RSATA_TXN2

GND

RSATA_RXP2

RSATA_RXN2

GND

GND

RSATA_TXP3

RSATA_TXN3

GND

RSATA_RXP3

RSATA_RXN3

GND

GND

RSATA_TXP4

RSATA_TXN4

GND

RSATA_RXP4

RSATA_RXN4

GND

SATA1

SATA4

SATA3

SATA2

These connectors are for the Serial ATA signal cables for Serial ATA hard disk
drives.

When using the connectors in Standard IDE mode, connect the primary (boot)
hard disk drive to the SATA1/2 connector. Refer to the table below for the
recommended SATA hard disk drive connections.

right angle side

Con n e ct t h e righ t - angl e si de
of SATA s i gna l c abl e t o SATA
device. Or you may connect the
right-angle side of SATA cable to
the onboard SATA port to avoid
me cha nical con fli ct wi th huge
graphics cards.

1-32 Chapter 1: Product introduction

4. JMicron JMB363® Serial ATA RAID connector (7-pin SATA_RAID)

R

P5B-VM

P5B-VM

SATA RAID Connector

SATA_RAID1

GND

RSATA_TXP1

RSATA_TXN1

GND

RSATA_RXP1

RSATA_RXN1

GND

R

P5B-VM

P5B-VM

IEEE 1394a Connector

IE1394_2

1

GND

+12V

TPB1-

GND

TPA1-

+12V

TPB1+

GND

TPA1+

This connector is for a Serial ATA signal cable. This connector supports

a Serial ATA hard disk drive that you can congure for RAID through the

onboard Serial ATA RAID controller.

The JMicron controller mode item in the BIOS is set to [AHCI] by default,
allowing you to use the connectors to build a RAID set. See section “2.4.5

Onboard Device Conguration” for details.

Before creating a RAID set using Serial ATA hard disks, make sure that you
have connected the Serial ATA signal cables and installed Serial ATA hard disk

drives; otherwise, you cannot enter the JMicron® JMB363 RAID utility and SATA

BIOS setup during POST.

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.

The IEEE 1394a module is purchased separately.

ASUS P5B-VM 1-33

6. USB connectors (10-1 pin USB56, USB 78, USB910)

R

P5B-VM

P5B-VM

Internal Audio Connector

CD

(black)

Right Audio Channel

Left Audio Channel

Ground

Ground

R

P5B-VM

P5B-VM

USB 2.0 Connectors

USB78

USB56

USB910

USB+5V

USB_P6-

USB_P6+

GND

NC

USB+5V

USB_P5-

GND

1

USB+5V

USB_P8-

USB_P8+

GND

NC

USB+5V

USB_P7-

GND

1

USB+5V

USB_P10-

USB_P10+

GND

NC

USB+5V

USB_P9-

GND

1

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!

You can 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 is purchased separately.

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

These connectors allow you to receive stereo audio input from sound sources
such as a CD-ROM, TV tuner, or MPEG card.

1-34 Chapter 1: Product introduction

8. CPU, chassis, and power fan connectors

R

P5B-VM

P5B-VM

Fan Connectors

CPU_FAN

GND

CPU FAN PWR

CPU FAN IN

CPU FAN PWM

CHA_FAN

1

GND

Rotation

+12V

GND

Rotation

+12V

PWR_FAN

R

P5B-VM

P5B-VM

COM Port Connector

PIN 1

COM1

(4-pin CPU_FAN, 3-pin CHA_FAN1, 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!

Only the CPU-FAN and CHA-FAN connectors support the ASUS Thermostat
feature.

9. Serial port connector (10-1 pin COM1)

This connector is for a serial (COM) port. Connect the serial port module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.

The COM module is purchased separately.

ASUS P5B-VM 1-35

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

R

P5B-VM

P5B-VM

Chassis Intrusion Connector

CHASSIS

+5VSB_MB

Chassis Signal

GND

(Default)

R

P5B-VM

P5B-VM

Front Panel Audio Connector

HP_HD

MIC2_L

HP_R

HP_L

MIC2_JD

Jack_Sense

MIC2_R

PRESENSE#

AGND

AAFP

Legacy AC�97-complian

t

pin definition

NC

MIC2_L

Line out_R

Line out_L

NC

NC

MIC2_R

NC

AGND

Azalia-compliant

pin definition

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.

11. 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.

• By default, this connector is set to HD Audio. If you want to connect

1-36 Chapter 1: Product introduction

a AC’ 97 front panel audio module to this connector, set the Front

Panel Support Type item in the BIOS setup to [AC97]. See section

2. 4. 5 Onboard Device Conguration for details.

R

P5B-VM

P5B-VM

ATX Power Connector

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

EATX12V

GND

+12V DC

GND
+12V DC

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

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.

•

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

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 EATX12V 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.

• 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 DDR2 (x4)
Graphics card: ASUS EAX1900XT
Parallel ATA device: IDE hard disk drive
Serial ATA device: SATA hard disk drive (x2)
Optical drive: DVD-RW

ASUS P5B-VM 1-37

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

R

P5B-VM

P5B-VM

System Panel Connector

* Requires an ATX power supply

NEL

PLED-

PWR

+5V

Speaker

Ground

RESET

Ground

Reset

Ground

Ground

PWRSW

PLED+

IDE_LED-

IDE_LED+

IDE_LED

PLED SPEAKER

PA

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.

1-38 Chapter 1: Product introduction

Q-Connector (system panel)

You can use ASUS Q-Connector to connect / disconnect chassis front panel

cables by only a few steps. Directions below shows how to install ASUS Q­Connector.

Step1.

Connect correct front panel to ASUS Q-

Connector rst. You can refer to the marking

on Q-Connector itself to know the detail pin

denition.

Step2.

Properly install the ASUS Q-Connector to the

System panel connctor.

Step3.

Front panel functions are enabled.

ASUS P5B-VM 1-39

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

2

2.1 Managing and updating your BIOS

The following utilities allow you to manage and update the motherboard Basic
Input/Output System (BIOS) setup.

1.

ASUS EZ Flash 2 (Updates the BIOS using a oppy disk, USB Flash, or the

motherboard support CD during POST.)

2. ASUS AFUDOS (Updates the BIOS in DOS mode using a bootable oppy

disk.)

ASUS CrashFree BIOS 3 (Updates the BIOS using a bootable oppy, USB

3.

Flash disk, or the motherboard support CD when the BIOS le fails or gets

corrupted.)

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

4.

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
a 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.

2.1.1 Creating a bootable oppy disk

1. Do either one of the following to create a bootable oppy disk.

DOS environment

a. Insert a 1.44MB oppy disk into the drive.

b. At the DOS prompt, type
Windows® XP environment

a. Insert a 1.44 MB oppy disk to the oppy disk drive.

b. Click

Start from the Windows® desktop, then select My Computer.

c. Select the 3 1/2 Floppy Drive icon.

d. Click

File from the menu, then select Format. A Format 3 1/2 Floppy

Disk window appears.

e. Select

Create an MS-DOS startup disk from the format options eld,

then click Start.

Windows® 2000 environment

To create a set of boot disks for Windows

a. Insert a formatted, high density 1.44 MB oppy disk into the drive.

b. Insert the Windows

c. Click

Start, then select Run.

d. From the Open eld, type

D:\bootdisk\makeboot a:

assuming that D: is your optical drive.

e. Press <Enter>, then follow screen instructions to continue.

format A:/S then press <Enter>.

®

2000:

®

2000 CD to the optical drive.

2-2 Chapter 2: BIOS setup

2. Copy the original or the latest motherboard BIOS le to the bootable oppy disk.

2.1.2 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-Test (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.
(1)

Insert the oppy disk / USB ash disk that contains the BIOS le to the
oppy disk drive or the USB port.

Press <Alt> + <F2> during POST to display the following.

ASUSTek EZ Flash 2 BIOS ROM Utility V3.00

FLASH TYPE: SST 49LF008 FWH

Current ROM

BOARD: P5B-VM

VER: 0024 [0101]
DATE: 05/16/06

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 Flash2

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!

ASUS P5B-VM 2-3

format only.

• 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!

format only.

2.1.3 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 CD 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.

2-4 Chapter 2: BIOS setup

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.

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 CD 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 /iP5B-VM.ROM

4. The utility veries the le and starts updating the BIOS.

A:\>afudos /iP5B-VM.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 /iP5B-VM.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:\>

ASUS P5B-VM 2-5

2.1.4 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 CD, the USB ash
disk, or the oppy disk that contains the updated BIOS le.

• Prepare the motherboard support CD, the USB ash disk, or the oppy

disk containing the updated motherboard BIOS before using this utility.

• Make sure that you rename the original or updated BIOS le in the oppy

disk or the USB ash disk to P5BVMA. ROM.

If your display monitor is connected to the onboard VGA connector,
the display monitor will turn-off and the system will beep once while
CrashFree BIOS 3 starts updating your system. The system will

beep once again while the process is nished, and the display will

return after the system restarts.

Recovering the BIOS from a oppy disk

To recover the BIOS from a oppy disk:

1. Turn on the system.

2. Insert the oppy disk with the original or updated BIOS le to the oppy disk

drive.

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

oppy disk for the original or updated 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 “P5BVMA.ROM”. Completed.
Start ashing...

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

2-6 Chapter 2: BIOS setup

Recovering the BIOS from the support CD

To recover the BIOS from the support CD:

1. Remove any oppy disk from the oppy disk drive, then turn on the system.

2. Insert the support CD to the optical drive.

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

oppy disk for the original or updated BIOS le.

Bad BIOS checksum. Starting BIOS recovery...
Checking for oppy...

When no oppy disk is found, the utility automatically checks the optical drive

for the original or updated BIOS le. The utility then updates the corrupted
BIOS le.

Bad BIOS checksum. Starting BIOS recovery...
Checking for oppy...
Floppy not found!
Checking for CD-ROM...
CD-ROM found!
Reading le “P5BVMA.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.

The recovered BIOS may not be the latest BIOS version for this motherboard.

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

ASUS P5B-VM 2-7

• 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!

2.1.5 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 CD 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 CD in the optical drive. The

2. Click the

Utilities tab, then click Install ASUS Update. See page 3-3 for the

Utilities screen menu.

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

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

2-8 Chapter 2: BIOS setup

Drivers menu appears.

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.

ASUS P5B-VM 2-9

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.

2-10 Chapter 2: BIOS setup

2.2 BIOS setup program

This motherboard supports a programmable rmware chip that you can update

using the provided utility described in section “2.1 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 rmware 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, reboot the system by doing any of the
following procedures:

• Restart using the OS standard shut-down procedure.

• Press <Ctrl>+<Alt>+<Del> simultaneously.

• Press the reset button on the system chassis.

• Press the power button to turn the system off then back on.

Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force
reset from a running operating system can cause damage to your data or
system. We recommend to always shut-down the system properly from the
operating system.

The 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 “2.8 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.

ASUS P5B-VM 2-11

2.2.1 BIOS menu screen

Menu bar Conguration eldsMenu items

System Time [11:51:19]
System Date [Mon 05/15/2006]
Legacy Diskette A [1.44M, 3.5 in]

SATA 1 :[Not Detected
SATA 2 :[Not Detected]
SATA 3 :[Not Detected]
SATA 4 :[Not Detected]

IDE Conguration

System Information

General help

Use [ENTER], [TAB]
or [SHIFT-TAB] to
select a eld.
Use [+] or [-] to
congure system time.

Navigation keysSub-menu items

2.2.2 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 setting EZ Flash 2 and O.C. Prole.

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.

2.2.3 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.

Some of the navigation keys differ from one screen to another.

2-12 Chapter 2: BIOS setup

2.2.4 Menu items

System Time [11:10:19]
System Date [Thu 03/27/2003]
Legacy Diskette A [1.44M, 3.5 in]
Legacy Diskette B [Disabled]

Primary IDE Master :[Not Detected]
Primary IDE Slave :[Not Detected]
Secondary IDE Master :[Not Detected]
Secondary IDE Slave :[Not Detected]
Third IDE Master :[Not Detected]
Fourth IDE Master :[Not Detected]
IDE Configuration

System Information

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

Use [+] or [-] to
configure system time.

Select Screen
Select Item
+- Change Field
Tab Select Field
F1 General Help
F10 Save and Exit
ESC Exit

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

Advanced Chipset settings

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

Configure DRAM Timing by SPD [Enabled]
Memory Acceleration Mode [Auto]
DRAM Idle Timer [Auto]
DRAm Refresh Rate [Auto]

Graphic Adapter Priority [AGP/PCI]
Graphics Aperture Size [ 64 MB]
Spread Spectrum [Enabled]

ICH Delayed Transaction [Enabled]

MPS Revision [1.4]

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,
Tool, and Exit) on the menu bar have their
respective menu items.

Main menu items

2.2.5 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>.

2.2.6 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.”

2.2.7 Pop-up window

Select a menu item then press <Enter> to display a pop-up window with the

conguration options for that item.

2.2.8 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.

2.2.9 General help

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

ASUS P5B-VM 2-13

Pop-up window

Scroll bar

2.3 Main menu

When you enter the BIOS Setup program, the Main menu screen appears, giving
you an overview of the basic system information.

Refer to section “4.2.1 BIOS menu screen” for information on the menu screen
items and how to navigate through them.

System Time [11:51:19]
System Date [Mon 05/15/2006]
Legacy Diskette A [1.44M, 3.5 in]

SATA 1 :[Not Detected
SATA 2 :[Not Detected]
SATA 3 :[Not Detected]
SATA 4 :[Not Detected]

IDE Conguration

System Information

Use [ENTER], [TAB]
or [SHIFT-TAB] to
select a eld.
Use [+] or [-] to
congure system time.

2.3.1 System Time [xx:xx:xx]

Allows you to set the system time.

2.3.2 System Date [Day xx/xx/xxxx]

Allows you to set the system date.

2.3.3 Legacy Diskette A [1.44M, 3.5 in.]

Sets the type of oppy drive installed. Conguration options: [Disabled] [360K, 5.25

in.] [1.2M , 5.25 in.] [720K , 3.5 in.] [1.44M, 3.5 in.] [2.88M, 3.5 in.]

2-14 Chapter 2: BIOS setup

2.3.4 SATA1, SATA2, SATA3, and SATA4

While entering Setup, the BIOS automatically detects the presence of IDE devices.
There is a separate sub-menu for each IDE device. Select a device item then
press <Enter> to display the IDE device information.

SATA 1

Device : Not Detected

Type [Auto]
LBA/Large Mode [Auto]
Block(Multi-sector Transfer) M [Auto]
PIO Mode [Auto]
DMA Mode [Auto]
Smart Monitoring [Auto]
32Bit Data Transfer [Disabled]

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 CDROM if you are specically conguring a

CD-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]

[CDROM] [ARMD]

LBA/Large Mode [Auto]

Enables or disables the LBA mode. Setting to Auto enables the LBA mode if the
device supports this mode, and if the device was not previously formatted with LBA

mode disabled. Conguration options: [Disabled] [Auto]

Block (Multi-sector Transfer) M [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]

ASUS P5B-VM 2-15

PIO Mode [Auto]

Selects the PIO mode.

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

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 [Disabled]

Enables or disables 32-bit data transfer.

Conguration options: [Disabled] [Enabled]

2.3.5 IDE Conguration

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

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

congure the item.

IDE Conguration

SATA Conguration [Enhanced]

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

SATA Conguration [Enhanced]

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

Hard Disk Write Protect [Disabled]

Allows you to enable to disable the hard disk write protection. This will be

effective only if device is accessed through BIOS. Conguration options:

[Disabled] [Enabled]

IDE Detect Time Out [35]

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

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

2-16 Chapter 2: BIOS setup

2.3.6 System Information

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

automatically detects the items in this menu.

AMIBIOS

Version : 0024
Build Date : 05/16/06

Processor

Type : Intel(R) Pentium(R) 4 CPU 3.00GHz
Speed : 3000MHz
Count : 1

System Memory

Usable Size: 256MB

AMI BIOS

Displays the auto-detected BIOS information

Processor

Displays the auto-detected CPU specication

System Memory

Displays the auto-detected system memory

ASUS P5B-VM 2-17

2.4 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.

Jumperfree Conguration
USB Conguration

CPU Conguration
Chipset

Onboard Devices Conguration
PCIPnP

2.4.1 Jumperfree Conguration

Congure System Frequency/Voltage

AI Tuning [Auto]

AI Tuning [Standard]

Allows selection of CPU frequency and auto adjustment of relevant parameters.
Frequencies higher than CPU manufacturer recommends are not guaranteed to

be stable. If the system becomes unstable, return to the default. Conguration

options: [Manual] [Standard]

The following items appear only when the AI Tuning item is set to [Manual].

CPU Frequency [200]

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 CPU frequency. You can also type the desired CPU frequency using the
numeric keypad. The values range from 100 to 400. Refer to the table below for
the correct Front Side Bus and CPU External Frequency settings.

2-18 Chapter 2: BIOS setup

FSB/CPU External Frequency Synchronization

Front Side Bus CPU External Frequency

FSB 1066 266 MHz

FSB 800 200 MHz

FSB 533 133 MHz

DRAM Frequency [Auto]

Allows you to set the DDR operating frequency.

Conguration options:

Available DRAM frequency options in various FSB settings

 FSB Congurationoptions

Auto DDR2- DDR2- DDR2- DDR2- DDR2-

533 667 800 889* 1067*

FSB 1066 • • • • • •
FSB 800 • • • •

* Provided for overclocking purpose only.

Selecting a very high DRAM frequency may cause the system to become
unstable! If this happens, revert to the default setting.

The DRAM Frequency item also appears when you set the AI Tuning item to [AI
NOS].

PCI Express Frequency [Auto]

Allows you to select PCI Express frequency.

Conguration options: [Auto] [90] [91] [92] [93]... [150]

Spread Spectrum [Enabled]

Allows you to enable or disable the clock generator spread spectrum.

Conguration options: [Disabled] [Enabled]

Memory Voltage [Auto]

Allows you to select the memory voltage or set it to auto for safe mode.

Conguration options: [Auto] [1.80V] [1.85V] [1.90V] [1.95V]

CPU VCore Voltage [Auto]

Allows selection of the CPU VCore voltage. The conguration options vary

depending on the CPU installed. Setting to Auto allows the BIOS to detect the
VCore voltage of the CPU installed.

Refer to the CPU documentation before setting the CPU VCore voltage. A very
high Vcore voltage can severely damage the CPU!

ASUS P5B-VM 2-19

2.4.2 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.

USB Conguration

Module Version - 2.24.0-11.4

USB Devices Enabled:
None

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

The Module Version and USB Devices Enabled items show the
auto-detected values. If no USB device is detected, the item shows None.

Legacy USB Support [Auto]

Allows you to enable or disable support for USB devices on legacy operating
systems (OS). 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]

Port 64/60 Emulation [Disabled]

Allows you to disable or enable the I/O port 60h/64h emulation support. This
should be enabled for the complete USB keyboard legacy support for non-USB

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

USB 2.0 Controller Mode [HiSpeed]

Allows you to congure the USB 2.0 controller in HiSpeed (480 Mbps) or Full
Speed (12 Mbps). Conguration options: [HiSpeed] [Full Speed]

BIOS EHCI Hand-Off [Enabled]

Allows you to enable support for operating systems without an EHCI hand-off

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

2-20 Chapter 2: BIOS setup

2.4.3 CPU Conguration

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

Congure advanced CPU settings
Module Version: 3C.0E

Manufacturer: Intel
Brand String: Intel(R) Pentium(R) 4 CPU 3.00GHz
Frequency : 3.00GHz
FSB Speed : 800MHz
Cache L1 : 16 KB
Cache L2 : 2048 KB
Ratio Actual Value: 15

Hardware Prefetcher [Enabled]
Adjacent Cache Line Prefetch [Enabled]
Max CPUID Value Limit: [Disabled]
Execute Disable Bit [Enabled]
Hyper Threading Technology [Enabled]
Intel(R) SpeedStep(tm) tech. [Automatic]
Intel(R) C-STATE tech. [Enabled]

Unlock locked CPU
and let it run at
lower multiplier
setting.

Hardware Prefetcher [Enabled]

Enables or disables the Hardware Prefetcher feature.

Conguration options: [Disabled] [Enabled]

Adjacent Cache Line Prefetch [Enabled]

Enables or disables the Adjacent Cache Line Prefetch feature.

Conguration options: [Disabled] [Enabled]

Max CPUID Value Limit [Disabled]

Enable this item to boot legacy operating systems that cannot support CPUs with

extended CPUID functions. Conguration options: [Disabled] [Enabled]

CPU TM function [Enabled]

Allows you to enable or disable the CPU internal thermal control function. In TM

mode, the CPU power consumption is reduced. Conguration options: [Disabled]

[Enabled]

Execute Disable Function [Enabled]

Allows you to Enable/disable Execute Disable Function.

Conguration options: [Disabled] [Enabled]

Hyper-Threading Technology [Enabled]

Allows you to enable or disable the processor Hyper-Threading Technology.

Conguration options: [Disabled] [Enabled]

ASUS P5B-VM 2-21

The following item appears only when you installed an Intel® Pentium® 4 or
later CPU that supports the Enhanced Intel SpeedStep® Technology (EIST).

Intel(R) SpeedStep Technology [Automatic]

Allows you to use the Enhanced Intel® SpeedStep® Technology. When set to
[Enabled], you can adjust the system power settings in the operating system to
use the EIST feature. Set this item to [Disabled] if you do not want to use the EIST.

Conguration options: [Automatic] [Disabled]

Intel(R) C-STATE Technology [Enabled]

Allows you to enable or disable the C-STATE technology. Conguration options:

[Enabled] [Disabled]

2.4.4 Chipset

The Chipset menu allows you to change the advanced chipset settings. Select an
item then press <Enter> to display the sub-menu.

Chipset Settings

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

NorthBridge Conguration

Nor t hB r id g e C o nf i gu r ati o n

North Bridge chipset Conguration

Memory Remap Feature [Disabled]
Congure DRAM Timing by SPD [Enabled]

Initiate Graphic Adapter [PEG/PCI]
Initiate Graphic Mode Select [Enabled, 8MB]

Fixed Graphic Memory Size [128MB]
DVMT Graphic Memory Size [128MB]

PEG Port Conguration
PEG Force x1 [Disabled]

Memory Remapping Feature [Disabled]
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]

2-22 Chapter 2: BIOS setup

Congure DRAM Timing by SPD [Enabled]

When this item is enabled, the DRAM timing parameters are set according to the
DRAM SPD (Serial Presence Detect). When disabled, you can manually set the
DRAM timing parameters through the DRAM sub-items. The following sub-items

appear when this item is Disabled. Conguration options: [Enabled] [Disabled]

DRAM CAS# Latency [5]

Controls the latency between the SDRAM read command and the time the

data actually becomes available. Conguration options: [3] [4] [5] [6]

DRAM RAS# to CAS# Delay [6 DRAM Clocks]

Controls the latency between the DDR SDRAM active command and the

read/write command. Conguration options: [2 DRAM Clocks] [3 DRAM

Clocks] [4 DRAM Clocks] [5 DRAM Clocks] [6 DRAM Clocks]

DRAM RAS# Precharge [6 DRAM Clocks]

Controls the idle clocks after issuing a precharge command to the DDR

SDRAM. Conguration options: [2 DRAM Clocks] [3 DRAM Clocks] [4 DRAM

Clocks] [5 DRAM Clocks] [6 DRAM Clocks]

DRAM RAS# Activate to Precha [15 DRAM Clocks]

Conguration options: [4 DRAM Clocks] [5 DRAM Clocks]...[18 DRAM Clocks]

DRAM Write Recovery Time [4 Clocks]

Set the write recovery timing.

DRAM TRFC [30 DRAM Clocks]

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

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

Initiate Graphic Adapter [PEG/PCI]

Allows you to select the graphics controller as the primary boot device.

Conguration options: [IGD] [PCI/IGD] [PCI/PEG] [PEG/IGD] [PEG/PCI]

Initiate Graphic Mode Select [Enabled, 8MB]

Allows you to select the amount of system memory used by the Internal graphics
device. Conguration options: [Disabled] [Enabled,1MB] [Enabled, 8MB]

Fixed Graphic Memory Size [128MB]

Allows you to select the xed graphic memory size.
Conguration options: [0MB] [32MB] [64MB] [128MB]

DVMT Graphic Memory Size [128MB]

Allows you to select the DVMT graphic memory size.
Conguration options: [0MB] [32MB] [64MB] [128MB] [224MB]

ASUS P5B-VM 2-23

PEG Force x1 [Disabled]

Conguration options: [Enabled] [Disabled]

2.4.5 Onboard Devices Conguration

HD Audio Controller [Enabled]
Onboard 1394 Controller [Enabled]
Onboard PCIE GbE LAN [Enabled]
LAN Option ROM [Disabled]
JMicron SATA/PATA Controller [Enabled]
JMicron Controller Mode [BASIC]

Serial Port1 Address [3F8/IRQ4]
Parallel Port Address [378]
Parallel Port Mode [ECP]
ECP Mode DMA Channel [DMA3]
Parallel Port IRQ [IRQ7]

HD Audio Controller [Enabled]

Allows you to enable or disable the High Denition Audio controller.
Conguration options: [Disabled] [Enabled]

Front Panel Support Type [HD Audio]

Allows you to set the Front Panel Support Type.

Conguration options: [AC97] [HD Audio]

Onboard 1394 Controller [Enabled]

Allows you to enable or disable the onboard 1394 controller.

Conguration options: [Disabled] [Enabled]

Onboard PCIE Gb LAN [Enabled]

Allows you to enable or disable the onboard PCIE Gigabit LAN controller.

Conguration options: [Disabled] [Enabled]

LAN Option ROM [Disabled]

Allows you to enable or disable the boot ROM in the onboard LAN controller.
This item appears only when the Onboard LAN item is set to Enabled.

Conguration options: [Disabled] [Enabled]

JMicron SATA/PATA Controller [Enabled]

Allows you to enable or disable the JMicron SATA/PATA controller.
Conguration options: [Disabled] [Enabled]

JMicron Controller Mode [BASIC]

Allows you to set the JMicron Controller Mode.
Conguration options: [RAID] [BASIC] [AHCI]

Must load the JMB363 driver when create RAID sets, even if all the drivers of
the RAID sets are used as data drivers.

2-24 Chapter 2: BIOS setup

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]

Parallel Port Address [378]

Allows you to select the Parallel Port base addresses.
Conguration options: [Disabled] [378] [278] [3BC]

Parallel Port Mode [ECP]

Allows you to select the Parallel Port mode.

Conguration options: [Normal] [Bi-directional] [EPP] [ECP]

ECP Mode DMA Channel [DMA3]

Appears only when the Parallel Port Mode is set to [ECP]. This item
allows you to set the Parallel Port ECP DMA.

Conguration options: [DMA0] [DMA1] [DMA3]

Parallel Port IRQ [IRQ7]

Conguration options: [IRQ5] [IRQ7]

ASUS P5B-VM 2-25

2.4.6 PCI PnP

The PCI PnP menu items allow you to change the advanced settings for PCI/PnP
devices. The menu includes setting IRQ and DMA channel resources for either

PCI/PnP or legacy ISA devices, and setting the memory size block for legacy ISA

devices.

Take caution when changing the settings of the PCI PnP menu items. Incorrect

eld values can cause the system to malfunction.

Advanced PCI/PnP Settings

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

Plug And Play O/S [No]
PCI Latency Timer [64]
Allocate IRQ to PCI VGA [Yes]
Palette Snooping [Disabled]

IRQ-3 assigned to [PCI Device]
IRQ-4 assigned to [PCI Device]
IRQ-5 assigned to [PCI Device]
IRQ-7 assigned to [PCI Device]
IRQ-9 assigned to [PCI Device]
IRQ-10 assigned to [PCI Device]
IRQ-11 assigned to [PCI Device]
IRQ-14 assigned to [PCI Device]
IRQ-15 assigned to [PCI Device]

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]

PCI Latency Timer [64]

Allows you to select the value in units of PCI clocks for the PCI device latency

timer register. Conguration options: [32] [64] [96] [128] [160] [192] [224] [248]

Allocate IRQ to PCI VGA [Yes]

When set to [Yes], BIOS assigns an IRQ to PCI VGA card if the card requests for
an IRQ. When set to [No], BIOS does not assign an IRQ to the PCI VGA card even

if requested. Conguration options: [No] [Yes]

Palette Snooping [Disabled]

When set to [Enabled], the pallete snooping feature informs the PCI devices that
an ISA graphics device is installed in the system so that the latter can function

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

2-26 Chapter 2: BIOS setup

IRQ-xx assigned to [PCI Device]

When set to [PCI Device], the specic IRQ is free for use of PCI/PnP devices.
When set to [Reserved], the IRQ is reserved for legacy ISA devices. Conguration

options: [PCI Device] [Reserved]

2.5 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.

Suspend Mode [Auto]
Repost Video on S3 Resume [Disabled]
ACPI 2.0 Support [Disabled]
ACPI APIC Support [Enabled]

APM Conguration
Hardware Monitor

2.5.1 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]

2.5.2 Repost Video on S3 Resume [Disabled]

Allows you to determines whether to invoke VGA BIOS POST on S3/STR resume.

Conguration options: [Disabled] [Enabled]

2.5.3 ACPI 2.0 Support [Disabled]

Allows you to add more tables for Advanced Conguration and Power Interface
(ACPI) 2.0 specications. Conguration options: [Disabled] [Enabled]

2.5.4 ACPI APIC Support [Enabled]

Allows you to enable or disable the Advanced Conguration and Power Interface
(ACPI) support in the Application-Specic Integrated Circuit (ASIC). When set

to Enabled, the ACPI APIC table pointer is included in the RSDT pointer list.

Conguration options: [Disabled] [Enabled]

ASUS P5B-VM 2-27

2.5.5 APM Conguration

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]

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,

and RTC Alarm Second appear with set values. Conguration options: [Disabled]

[Enabled]

Power On By External Modems [Disabled]

This allows either settings of [Enabled] or [Disabled] for powering up the computer
when the external modem receives a call while the computer is in Soft-off mode.

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]

When set to [Enabled], this parameter allows you to turn on the system through a
PCI LAN or modem card. This feature requires an ATX power supply that provides

at least 1A on the +5VSB lead. Conguration options: [Disabled] [Enabled]

Power On By PCIE Devices [Disabled]

When set to [Enabled], this parameter allows you to turn on the system through a
PCIE LAN or modem card. This feature requires an ATX power supply that provides

at least 1A on the +5VSB lead. Conguration options: [Disabled] [Enabled]

2-28 Chapter 2: BIOS setup

Power On By PS/2 Keyboard [Disabled]

Allows you to use specic keys on the 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]

2.5.6 Hardware Monitor

Hardware Monitor

CPU Temperature [48ºC/118ºF]
MB Temperature [38ºC/100ºF]

CPU Fan Speed (RPM) [Ignored]
Chassis Fan1 Speed [N/A]
Power Fan Speed (RPM)

VCORE Voltage [ 1.320V]

3.3V Voltage [ 3.345V]
5V Voltage [ 5.094V]
12V Voltage [11.880V]

ASUS Advanced Q-Fan Control

Fan Prole [Silent]

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 Fan Speed (RPM) [xxxxRPM] or [N/A] or [Ignored]

The onboard hardware monitor automatically detects and displays the CPU
fan speed in rotations per minute (RPM). If the fan is not connected to the

motherboard, the eld shows N/A. Select Ignored if you do not wish to display the

detected speed.

Chassis Fan1 Speed [xxxxRPM] or [N/A] or [Ignored]

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 chassis, the specic eld

shows N/A. Select Ignored if you do not wish to display the detected speed.

ASUS P5B-VM 2-29

Power Fan Speed (RPM) [xxxxRPM] or [N/A] or [Ignored]

The onboard hardware monitor automatically detects and displays the power fan speed

in rotations per minute (RPM). If the fan is not connected to the chassis, the specic eld

shows N/A. Select Ignored if you do not wish to display the detected speed.

VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage

The onboard hardware monitor automatically detects the voltage output through
the onboard voltage regulators.

ASUS Advanced Q-Fan Control [Disabled]

Allows you to enable or disable the ASUS Advanced Q-Fan control.

Conguration options: [Disabled] [Performance] [Optimal] [Silent] [Ultra Silent]

The option of “Ultra Silent” is for Intel® Core™2 processors only.

2.6 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.

Boot settings

Boot Device Priority

Boot Settings Conguration
Security

2.6.1 Boot Device Priority

Boot Device Priority

1st Boot Device [1st FLOPPY DRIVE]
2nd Boot Device [PM-ST330620A]
3rd Boot Device [PS-ASUS CD-S360]

2-30 Chapter 2: BIOS setup

1st ~ xxth Boot Device [1st Floppy 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: [xxxxx Drive] [Disabled]

2.6.2 Boot Settings Conguration

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]

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

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],
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 MyLogo2™ feature.

Add On 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]

PS/2 Mouse Support [Auto]

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

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

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]

ASUS P5B-VM 2-31

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]

2.6.3 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.

Security Settings

Supervisor Password : Not Installed
User Password : Not Installed

Change Supervisor Password
Change User Passward

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

Change Supervisor Password

Select this item to set or change the supervisor password. The Supervisor
Password item on top of the screen shows the default Not Installed. After you set a
password, this item shows Installed.

To set a Supervisor Password:

1. 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 clear it by erasing the CMOS
Real Time Clock (RTC) RAM. See section “2.6 Jumpers” for information on how
to erase the RTC RAM.

2-32 Chapter 2: BIOS setup

After you have set a supervisor password, the other items appear to allow you to
change other security settings.

Security Settings

Supervisor Password : Not Installed
User Password : Not Installed

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

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 Change User Password item and press <Enter>.

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.

Clear User Password

Select this item to clear the user password.

ASUS P5B-VM 2-33

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]

2.7 Tools menu

ASUS EZ Flash 2

2.7.1 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. Please see page 4-2, section 4.1.2 for

details.

ASUSTek EZ Flash 2 BIOS ROM Utility V3.00

FLASH TYPE: SST 49LF008 FWH

Current ROM

BOARD: P5B-VM

VER: 0024 [0101]
DATE: 05/16/06

PATH: A:\

A:

Note

[Enter] Select or Load [B] Backup [ESC] Exit
[Tab] Switch [Up/Down/Home/End] Move

Update ROM

BOARD: Unknown

VER: Unknown
DATE: Unknown

2-34 Chapter 2: BIOS setup

2.8 Exit menu

The Exit menu items allow you to load the optimal or failsafe default values for the
BIOS items, and save or discard your changes to the BIOS items.

Exit Options

Exit & Save Changes
Exit & Discard Changes
Discard Changes

Load Setup Defaults

Pressing <Esc> does not immediately exit this menu. Select one of the options
from this menu or <F10> from the legend bar to exit.

Exit & Save Changes

Once you are nished making your selections, choose this option from the Exit

menu to ensure the values you selected are saved to the CMOS RAM. An onboard
backup battery sustains the CMOS RAM so it stays on even when the PC is turned
off. When you select this option, a conrmation window appears. Select OK to save
changes and exit.

If you attempt to exit the Setup program without saving your changes, the
program prompts you with a message asking if you want to save your changes
before exiting. Press <Enter> to save the changes while exiting.

Exit & Discard Changes

Select this option only if you do not want to save the changes that you made to

the Setup program. If you made changes to elds other than System Date, System
Time, and Password, the BIOS asks for a conrmation before exiting.

Discard Changes

This option allows you to discard the selections you made and restore the

previously saved values. After selecting this option, a conrmation appears. Select

OK to discard any changes and load the previously saved values.

Load Setup Defaults

This option allows you to load the default values for each of the parameters on the

Setup menus. When you select this option or if you press <F5>, a conrmation

window appears. Select OK to load default values. Select Exit & Save Changes or
make other changes before saving the values to the non-volatile RAM.

ASUS P5B-VM 2-35

2-36 Chapter 2: BIOS setup

This chapter describes the contents
of the support CD that comes with the
motherboard package.

Software

3

support

ASUS P5B-VM 3-1

3.1 Installing an operating system

This motherboard supports Windows® 2000/XP/64-bit XP operating systems (OS).

Always install the latest OS version and corresponding updates to maximize the

features of your hardware.

• Motherboard settings and hardware options vary. Use the setup
procedures presented in this chapter for reference only. Refer to your OS
documentation for detailed information.

®

• Make sure that you install Windows
XP Service Pack2 or later versions before installing the drivers for better
compatibility and system stability.

2000 Service Pack 4 or the Windows®

3.2 Support CD information

The support CD that came with the motherboard package contains the drivers,
software applications, and utilities that you can install to avail all motherboard
features.

The contents of the support CD are subject to change at any time without
notice. Visit the ASUS website(www.asus.com) for updates.

3.2.1 Running the support CD

Place the support CD to the optical drive. The CD automatically displays the
Drivers menu if Autorun is enabled in your computer.

Click an icon to display

support CD/motherboard

information

Click an item to install

If Autorun is NOT enabled in your computer, browse the contents of the support

CD to locate the le ASSETUP.EXE from the BIN folder. Double-click the

ASSETUP.EXE to run the CD.

3-2 Chapter 3: Software support

3.2.2 Drivers menu

The drivers menu shows the available device drivers if the system detects installed
devices. Install the necessary drivers to activate the devices.

ASUS InstAll-Drivers Installation Wizard

Installs the ASUS InstAll-Drivers Installation Wizard.

Intel Chipset Inf Update Program

Installs the Intel® chipset Inf update program.

Intel Graphics Accelerator Driver

Installs the Intel Graphics Accelerator driver.

SoundMAX ADI1988 Audio Driver

Installs the SoundMAX® ADI1988 audio driver and application.

Realtek RTL 8111b Ethernet Driver

Installs the Realtek RTL 8111b Ethernet driver and application.

JMicron JMB36X RAID Controller Driver

Installs the JMicron® JMB36X Serial ATA RAID controller driver.

USB 2.0 Driver

Installs the USB 2.0 Driver.

ASUS P5B-VM 3-3

3.2.3 Utilities menu

The Utilities menu shows the applications and other software that the motherboard
supports.

ASUS InstAll-Installation Wizard for Utilities

Install the ASUS InstAll-Installation Wizard.

ASUS Update

The ASUS Update utility allows you to update the motherboard BIOS in Windows®
environment. This utility requires an Internet connection either through a network
or an Internet Service Provider (ISP)

AI Gear
AI Gear provides four modes that adjust the CPU frequency and Vcore voltage

minimizing system noise and power consumption. You can choose the mode that

best suits your computing needs.

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.

ASUS PC Probe II

This smart utility monitors the fan speed, CPU temperature, and system voltages,
and alerts you of any detected problems. This utility helps you keep your computer
in healthy operating condition.

Anti-Virus Utility

The anti-virus application scans, identies, and removes computer viruses. View

the online help for detailed information.

3-4 Chapter 3: Software support

ADOBE Acrobat Reader V7.0

Installs the Adobe® Acrobat® Reader that allows you to open, view, and print
documents in Portable Document Format (PDF).

Microsoft DirectX 9.0c

Installs the Microsoft® DirectX 9.0c driver. The Microsoft DirectX® 9.0c is a
multimedia technology that enhances computer graphics and sound. DirectX®
improves the multimedia features of you computer so you can enjoy watching
TV and movies, capturing videos, or playing games in your computer. Visit the
Microsoft website (www.microsoft.com) for updates.

3.2.4 Make Disk menu

The Make Disk menu contains items to create JMicron® JMB363 SATA/PATA RAID
driver disk.

Make JMicron JMB36X 32bit RAID Driver

Allows you to create a JMicron® JMB36X 32bit RAID driver.

Make JMicron JMB36X 64bit RAID Driver

Allows you to create a JMicron® JMB36X 64bit RAID driver.

ASUS P5B-VM 3-5

3.2.5 Manuals menu

The Manuals menu contains a list of supplementary user manuals. Click an item to
open the folder of the user manual.

Most user manual les are in Portable Document Format (PDF). Install the Adobe®

Acrobat® Reader from the Utilities menu before opening a user manual le.

3.2.6 ASUS Contact information

Click the Contact tab to display the ASUS contact information. You can also nd

this information on the inside front cover of this user guide.

3-6 Chapter 3: Software support

3.3 Software information

Most of the applications in the support CD have wizards that will conveniently
guide you through the installation. View the online help or readme le that came

with the software application for more information.

3.3.1 SoundMAX® High Denition Audio utility

The ADI AD1988A High Denition Audio CODEC provides 8-channel audio

capability through the SoundMAX® audio utility with AudioESP™ software to
deliver the ultimate audio experience on your PC. The software implements high
quality audio synthesis/rendering, 3D sound positioning, and advanced voice-input
technologies.

Follow the installation wizard to install the ADI AD1988A Audio Driver from the

support CD that came with the motherboard package to activate the SoundMAX®
audio utility.

•

You must use 4-channel, 6-channel or 8-channel speakers for this setup.

®

• SoundMAX
sure that one of these operating systems is installed before installing
SoundMAX®.

• Jack Retasking function works on High Denition front panel audio ports

only.

requires Microsoft® Windows® 2000/XP or later version. Make

If the SoundMAX® audio utility is correctly installed, you

will nd the SoundMAX® icon on the taskbar.

From the taskbar, double-click on the SoundMAX® icon to display the SoundMAX®
Control Panel.

ASUS P5B-VM 3-7

Audio preferences

Click the icon to go to the Preferences page. This page allows you to change
various audio settings.

Enhanced Microphone Features

Voice recording

Enables Noise Filter function. Detects repetitive and stationary noises like
computer fans, air conditioners, and other background noises then eliminates
it in the incoming sudio stream while recording. You can enable it for a better
recording quality.

3.3.2 ASUS AI Gear

ASUS AI Gear provides four system performance options that allows you to select
the best performance setting for your computing needs. This easy-to-use utility

adjusts the processor frequency and vCore voltage to minimize system noise and

power consumption.

Shift the gear to the performance setting that you like.

3-8 Chapter 3: Software support

Maximum

Performance

Medium

Performance

High

Performance

Maximum

Power Saving

3.3.3 ASUS AI Nap

This feature allows you to minimize the power consumption of your computer

whenever you are away. Enable this feature for minimum power consumption and
a more quiet system operation.

Click Yes on the conrmation screen.

To exit AI Nap mode, press the system power or mouse button then click Yes on

the conrmation screen.

ASUS P5B-VM 3-9

3-10 Chapter 3: Software support

The Appendix describes the CPU
features and technologies that the
motherboard supports.

CPU features

A

A.1 Intel® EM64T

• The motherboard is fully compatible with Intel® Pentium® 4 LGA775
processors running on 32-bit operating systems.

• The motherboard comes with a BIOS le that supports EM64T.
You can download the latest BIOS le from the ASUS website
(www.asus.com/support/download/) if you need to update the BIOS le.

See Chapter 4 for details.

• Visit www.intel.com for more information on the EM64T feature.

®

• Visit www.microsoft.com for more information on Windows

Using the Intel® EM64T feature

To use the Intel® EM64T feature:

1. Install an Intel

2. Install a 64-bit operating system (Windows
Windows® Server 2003 x64 Edition).

3. Install the 64-bit drivers for the motherboard components and devices from
the support CD.

4. Install the 64-bit drivers for expansion cards or add-on devices, if any.

®

Pentium® 4 CPU that supports the Intel® EM64T.

®

XP Professional x64 Edition or

Refer to the expansion card or add-on device(s) documentation, or visit the
related website, to verify if the card/device supports a 64-bit system.

64-bit OS.

A.2 Enhanced Intel SpeedStep®

Technology (EIST)

• The motherboard comes with a BIOS le that supports EIST.
You can download the latest BIOS le from the ASUS website

(www.asus.com/support/download/) if you need to update the BIOS. See
Chapter 4 for details.

• Visit www.intel.com for more information on the EIST feature.

A.2.1 System requirements

Before using EIST, check your system if it meets the following requirements:

• Intel

• BIOS le with EIST support

• Operating system with EIST support (Windows

A-2 Appendix: CPU features

®

Pentium® 4 processor with EIST support

®

2003 SP1/Linux 2.6 kernel or later versions)

XP SP2/Windows® Server

A.2.2 Using the EIST

To use the EIST feature:

1. Turn on the computer, then enter the BIOS Setup.

2. Go to the Advanced Menu, highlight CPU Conguration,

then press <Enter>.

3. Set the

Intel(R) SpeedStep Technology item to [Automatic],

then press <Enter>. See page 4-22 for details.

4. Press <F10> to save your changes and exit the BIOS setup.

5. After the computer restarts, right click on a blank space on the desktop, then
select Properties from the pop-up menu.

6. When the Display Properties window
appears, click the Screen Saver tab.

7. Click the Power button on the
Monitor power section to open the
Power Options Properties window.

8. On the Power schemes section, click

, then select any option except

Home/Ofce Desktop or Always

On.

9. Click Apply, then click OK.

10. Close the Display Properties window.
After you adjust the power scheme,
the CPU internal frequency slightly
decreases when the CPU loading is
low.

The screen displays and procedures may vary depending on the operating
system.

ASUS P5B-VM A-3