ASUS P4B-MX User Manual

®

P4B-MX

User Guide

Motherboard

E810

First Edition August 2001

Copyright © 2001 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, modified or altered, unless such repair, modification 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 identification or explanation and to the owners’ benefit, without intent to infringe.

ii

Contents

FCC/CDC statements .....................................................................	vi
Safety information ..........................................................................	vii
About this guide ............................................................................	viii
How this guide is organized ..................................................	viii
Conventions used in this guide ...............................................	ix
Where to find more information ..............................................	ix
ASUS contact information ................................................................	x

Chapter 1: Product introduction ..........................................		1-1
1.1	Welcome! ............................................................................	1-1
1.2	Package contents ...............................................................	1-1
1.3	Overview .............................................................................	1-2
	1.3.1 Identifying the motherboard components ................	1-2
	1.3.2 Pre-installed accessory ...........................................	1-5
1.4	Special features ..................................................................	1-6

Chapter 2: Hardware information .........................................			2-1
2.1	Motherboard installation ......................................................		2-1
	2.1.1	Placement direction ................................................	2-1
	2.1.2	Screw holes ............................................................	2-1
2.2	Motherboard layout .............................................................		2-2
2.3	Before you proceed .............................................................		2-3
2.4	Central Processing Unit (CPU) ............................................		2-4
	2.4.1	Overview ................................................................	2-4
	2.4.2	Installing the CPU ...................................................	2-5
	2.4.3 Installing the heatsink and fan .................................		2-7
	2.4.4 Connecting the CPU fan cable ................................		2-9
2.5	System memory ................................................................		2-10
	2.5.1	Overview ..............................................................	2-10
	2.5.2	Memory configurations .........................................	2-10
	2.5.3	Installing a DIMM ...................................................	2-11
	2.5.4	Removing a DIMM ................................................	2-12
2.6	Expansion slots .................................................................		2-13
	2.6.1 Installing an expansion card..................................		2-13
	2.6.2 Configuring an expansion card .............................		2-14
	2.6.3	PCI slots ...............................................................	2-15
	2.6.4	AGP slot ...............................................................	2-15

iii

Contents

2.7	Switches and jumpers .......................................................		2-16
	2.7.1	Switch settings......................................................	2-16
	2.7.2	Jumper settings ....................................................	2-18
2.8	Connectors .......................................................................		2-21

Chapter 3: Powering up ........................................................			3-1
3.1	Starting up for the first time ..................................................		3-1
3.3	Powering off the computer...................................................		3-2
Chapter 4: BIOS setup ..........................................................			4-1
4.1	Managing and updating your BIOS ......................................		4-1
	4.1.1 Using the computer system for the first time ...........		4-1
	4.1.2	Updating BIOS procedures .....................................	4-3
4.2	BIOS Setup program ...........................................................		4-5
	4.2.1	BIOS menu bar .......................................................	4-6
	4.2.2	Legend bar .............................................................	4-6
4.3	Main menu ..........................................................................		4-8
	4.3.1 Primary & Secondary Master/Slave ........................		4-9
	4.3.2	Keyboard Features ...............................................	4-13
4.4	Advanced Menu ................................................................		4-15
	4.4.1	Chip Configuration ................................................	4-17
	4.4.2	I/O Device Configuration .......................................	4-19
	4.4.3	PCI Configuration .................................................	4-21
4.5	Power Menu ......................................................................		4-24
	4.5.1	Power Up Control .................................................	4-26
	4.5.2	Hardware Monitor .................................................	4-28
4.6	Boot Menu ........................................................................		4-29
4.7	Exit Menu ..........................................................................		4-31
Chapter 5: Software support ................................................			5-1
5.1	Install an operating system ..................................................		5-1
	5.1.1 Windows 98 first time installation ............................		5-1
5.2	Support CD information .......................................................		5-1
	5.2.1 Running the support CD .........................................		5-1
	5.2.2	Main menu .............................................................	5-2
	5.2.3	Software menu .......................................................	5-3
	5.2.4	Drivers menu ..........................................................	5-5

iv

Contents

5.2.5	DOS Utilities menu .................................................	5-6
5.2.6	ASUS Contact Information ......................................	5-6
5.2.7	Other information ....................................................	5-7
5.3 Software information ...........................................................		5-9
5.3.1	ASUS Update .........................................................	5-9
Glossary ................................................................................		G-1
Index ........................................................................................		I-1

v

FCC/CDC statements

Federal Communications Commission Statement

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

•This device may not cause harmful interference, and

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

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with manufacturer’s instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

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

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

The use of shielded cables for connection of the monitor to the graphics card is required to assure compliance with FCC regulations. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.

Canadian Department of Communications Statement

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

This class B digital apparatus complies with Canadian ICES-003.

vi

Safet y information

Electrical safety

•To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system.

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

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

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

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

•If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.

Operation safety

•Before installing the motherboard and adding devices on it, carefully read all the manuals that came with the package.

•Before using the product, make sure all cables are correctly connected and the power cables are not damaged. If you detect any damage, contact your dealer immediately.

•To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets and circuitry.

•Avoid dust, humidity, and temperature extremes. Do not place the product in any area where it may become wet.

•Place the product on a stable surface.

•If you encounter technical problems with the product, contact a qualified service technician or your retailer.

vii

About this guide

This user guide contains the information you need when installing the ASUS P4B-MX motherboard.

How this guide is organized

This manual contains the following parts:

•Chapter 1: Product introduction

This chapter describes the features of the P4B-MX motherboard. It includes brief descriptions of the special attributes of the motherboard and the new technology it supports.

•Chapter 2: Hardware information

This chapter lists the hardware setup procedures that you have to perform when installing system components. It includes description of the switches, jumpers, and connectors on the motherboard.

•Chapter 3: Powering up

This chapter describes the power up sequence and gives information on the BIOS beep codes.

•Chapter 4: BIOS setup

This chapter tells how to change system settings through the BIOS Setup menus. Detailed descriptions of the BIOS parameters are also provided.

•Chapter 5: Software support

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

•Glossary

This part lists the technical terms that you may encounter when reading this document.

•Index

This part contains an alphabetical list of the topics found in this document.

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.

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: Information that you MUST follow to complete a task.

NOTE: Tips and additional information to aid in completing a task.

Where to find more information

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

1. ASUS Websites

The ASUS websites worldwide provide updated information on ASUS hardware and software products. The ASUS websites are listed in the ASUS Contact Information on page x.

2.Optional Documentation

Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package.

ix

ASUS contact information

ASUSTeK COMPUTER INC. (Asia-Pacific)

Marketing

Address:	150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone:	[phone]
Fax:	[phone]
Email:	[e-mail]

Technical Support

Tel (English):	[phone]
Tel (Chinese):	[phone]
Fax:	[phone]
Email:	[e-mail]
Newsgroup:	cscnews.asus.com.tw
WWW:	www.asus.com.tw
FTP:	ftp.asus.com.tw/pub/ASUS

ASUS COMPUTER INTERNATIONAL (America)

Marketing

Address:	6737 Mowry Avenue, Mowry Business Center, Building 2
	Newark, CA 94560, USA
Fax:	[phone]
Email:	[e-mail]

Technical Support

Fax:	[phone]
BBS:	[phone]
Email:	[e-mail]
WWW:	www.asus.com
FTP:	ftp.asus.com/pub/ASUS

ASUS COMPUTER GmbH (Europe)

Marketing

Address:	Harkortstr. 25, 40880 Ratingen, BRD, Germany
Fax:	[phone]
Email:	[e-mail] (for marketing requests only)

Technical Support

Hotline:	MB/Others: [phone]
	Notebook: [phone]
Fax:	[phone]
Support (Email):	www.asuscom.de/de/support (for online support)
WWW:	www.asuscom.de
FTP:	ftp.asuscom.de/pub/ASUSCOM

x

Chapter 1

This chapter describes the features of the P4B-MX motherboard. It includes brief explanations of the special attributes of the motherboard and the new technology it supports.

Product introduction

ASUS P4B-MX motherboard

1.1Welcome!

Thank you for buying the ASUS® P4B-MX motherboard!

The ASUS P4B-MX motherboard delivers a host of new features and latest technology making it another standout in the long line of ASUS quality motherboards!

The P4B-MX incorporates the Intel® Pentium® 4 Processor in 478-pin package/Northwood Processor coupled with the Intel® 845 (Brookdale) chipset to set a new benchmark for an effective desktop platform solution.

Supporting up to 3GB of system memory with PC100/133 unbuffered SDRAM, high-resolution graphics via an AGP 4X slot, high-speed data transfers using the ATA100 protocol, and AC ‘97-compliant audio features, the P4B-MX is your perfect vehicle to get ahead in the world of power computing!

Before you start installing the motherboard, and hardware devices on it, check the items in your package with the list below.

1.2Package contents

Check your P4B-MX package for the following items.

ASUS P4B-MX motherboard (micro-ATX form factor: 9.6-in x 9.6-in)

ASUS P4B-MX support CD

ASUS 2-port USB module

80-conductor ribbon cable for UltraDMA/33/66/100 IDE drives

Ribbon cable for a 3.5-inch floppy drive

Bag of extra jumper caps

User Guide

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

ASUS P4B-MX motherboard user guide

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1.3Over view

Before you install the P4B-MX motherboard, take some time to familiarize yourself with its physical configuration and available features. This will facilitate the motherboard installation and future upgrades. A sufficient knowledge of the motherboard specifications will also help you avoid mistakes that may damage the board and its components.

This section presents the motherboard components and points out their specific locations. A brief description of each component follows. Refer to Chapter 2 for detailed information on these components.

1.3.1 Identifying the motherboard components

	4
	5
3	6
	7
2	8

9

1

10

265

25

24

23

11

22

21	12
20

19

18

17

16

15

14

13

Figure 1-1 Motherboard Components

Proceed to the succeeding pages for a brief description of each component.

1-2	Chapter 1: Product introduction

1CPU socket. A 478-pin surface mount, Zero Insertion Force (ZIF) socket called mPGA478 B. This socket accommodates the Intel® Pentium® 4 478/Northwood Processor with 400MHz system bus.

2North bridge controller. This controller called the Intel Memory Controller Hub (MCH) is one of the two major components of the Intel 845 (Brookdale) chipset. The MCH along with the south bridge Intel I/O Controller Hub 2 (ICH2) are interconnected through the Intel proprietary Hub interface. The MCH provides the processor interface, system memory interface, AGP interface, and Hub Interface.

3SDRAM DIMM sockets. These three 168-pin DIMM sockets support up to 3GB using unbuffered ECC or non-ECC PC100/133 SDRAM DIMMs.

4Super I/O chipset. This Low Pin Count (LPC) chipset combines the commonly used Super I/O functionality and system hardware monitoring capability. The chipset incorporates Fan Speed Control Monitor (FSCM), event wake-up feature, floppy disk controller, keyboard/mouse controller, a parallel port, two enhanced serial ports (one with infrared support), watchdog timer, and a MIDI interface compatible with MPU-401 UART mode.

5ATX power connector. This 20-pin connector connects to an ATX 12V power supply. The power supply must have at least 1A on the +5V standby lead (+5VSB).

6IDE connectors. These dual-channel bus master IDE connectors support up to four Ultra DMA/100/66, PIO Modes 3 & 4 IDE devices. Both the primary (blue) and secondary (black) connectors are slotted to prevent incorrect insertion of the IDE ribbon cable.

7Floppy disk connector. This connector accommodates the provided ribbon cable for the floppy disk drive. One side of the connector is slotted to prevent incorrect insertion of the floppy disk cable.

8Flash EEPROM. This 2Mb firmware contains the programmable BIOS program.

9DIP switches. This 10-switch Dual Inline Package (DIP) allows you to set the CPU external frequency.

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10South bridge controller. Referred to as the Intel I/O Controller Hub 2 (ICH2) of the Intel 845 chipset, this controller provides the I/O subsystem that allows access to the rest of the system. The ICH2 integrates I/O functions such as system bus interface, Ultra ATA/100, Low Pin Count (LPC) interface, Universal Serial Bus (USB) 1.1 interface, PCI interface, and CNR interface.

11AGP slot. This Accelerated Graphics Port (AGP) slot supports 1.5V AGP4X mode graphics cards for 3D graphical applications.

12Onboard LED. This onboard LED lights up if there is a standby power on the motherboard. This LED acts as a reminder to turn off the system power before plugging or unplugging devices.

13Audio CODEC. This AC ‘97 audio codec provides stereo analog I/O on the motherboard and peripheral devices to deliver high quality audio to PC-connected speakers, headphones, and microphones. The codec includes analog-to-digital and digital-to- analog sample rate converters, as power amplifiers and programmable gain blocks.

14PCI slots. These three 32-bit PCI 2.2 expansion slots support bus master PCI cards like SCSI or LAN cards with 133MB/s maximum throughput.

15LAN controller. This Intel 82562ET is a highly integrated Platform LAN Connect (PLC) device that allows 10BASE-T and 100BASE-TX networking capabilities, and provides the LAN solution to perform high-speed data transfers over the PCI bus.

16ATX 12V connector. This power connector connects the 4-pin 12V plug from the ATX 12V power supply.

17USB ports. These two 4-pin Universal Serial Bus (USB) ports are available for connecting USB devices such as a mouse and PDA.

18RJ-45 port. This port allows connection to a Local Area Network (LAN) through a network hub.

19Microphone jack. This Mic (pink) jack connects a microphone. In 6-channel mode, the function of this jack becomes Bass/Center.

20Line In jack. This Line In (light blue) jack connects a tape player or other audio sources.

21Line Out jack. This Line Out (lime) jack connects a headphone or a speaker.

1-4	Chapter 1: Product introduction

22Game/MIDI connector. This connector supports a joystick or a game pad for playing games, and MIDI devices for playing or editing audio files.

23Serial ports. These two 9-pin COM1/COM2 ports are for pointing devices or other serial devices.

24Parallel port. This 25-pin port connects a parallel printer, a scanner, or other devices.

25PS/2 keyboard port. This purple 6-pin connector is for a PS/2 keyboard.

26PS/2 mouse port. This green 6-pin connector is for a PS/2 mouse.

1.3.2 Pre-installed accessory

This motherboard is shipped with the heatsink retention module base already installed. This module should fit the retention mechanism that comes with a boxed CPU.

You do not have to remove the retention module base when installing the CPU or installing other motherboard components.

Retention Module Base

Figure 1-2 Pre-installed Heatsink Retention Module Base

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1.4Special features

Latest processor technology

The P4B-MX motherboard supports the latest Intel Pentium 4 478/ Northwood Processor, also known as P4, via a 478-pin surface mount ZIF socket. The Pentium 4 processor utilizes the advanced 0.18 micron processor core in FC-PGA2 package for a 2.0GHz frequency, while the Northwood processor uses the 0.13 micron processor core with 512KB L2 cache for up to a speedy 2.4GHz frequency. The P4 offers optimized performance for audio, video, and Internet applications.

Onboard LAN

The motherboard incorporates the Intel 82562ET, a highly integrated Platform LAN Connect (PLC) device that combines 10BASE-T/ 100BASE-TX capabilities. This controller also provides the LAN enabling solution for the integrated networking connectivity in Intel I/O Controller Hub 2 (ICH2) based platforms, allowing enhanced bus mastering capabilities for high-speed data transfers over the PCI bus. The bus mastering capabilities permit processing of high-level commands and performing multiple operations, thereby offloading communications tasks from the CPU.

1-6	Chapter 1: Product introduction

Chapter 2

This chapter describes the hardware setup procedures that you have to perform when installing system components. It includes details on the switches, jumpers, and connectors on the motherboard.

Hardware information

ASUS P4B-MX motherboard

2.1Motherboard installation

Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits into it. The P4B-MX uses the microATX form factor that measures 9.6 inches x 9.6 inches, a standard fit for most chassis.

Make sure to unplug the power cord before installing or removing the motherboard. Failure to do so may cause you physical injury and damage motherboard components.

2.1.1 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. Refer to the image below.

2.1.2 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 may damage the motherboard.

Place this side towards the rear of the chassis

Figure 2-1 Motherboard placement and screw holes

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2.2Motherboard layout

			24.4cm (9.60in)
PS/2KBMS			CPU_FAN
T: Mouse
B: Keyboard

COM1		Socket 478
	PORT
	PARALLEL	KBPWR
COM2

AUDIO	Line
	Out
_	Line	SYSTEM_FAN	Intel 845
	In
GAME
	In		Memory
	Mic
			Controller
Bottom: Top:			Hub (MCH)
USB1 RJ-45		ATX12V
USB2
		Accelerated Graphics Port (AGP)
	LAN Controller
	CD_IN	PCI1
		SMB
			®
			CR2032 3V
		PCI2	Lithium Cell
			CMOS Power
	USBPWR	P4B-MX
	AUX
		LED1
	Audio	PCI3
	Codec

Multi

(64/72-bit, 168-pin module)

(64/72-bit, 168-pin module)

(64/72-bit, 168-pin module)

I/O

ATX Power Connector

DIMM Socket 1

DIMM Socket 2

DIMM Socket 3

SECONDARYIDE

PRIMARYIDE

24.4cm (9.6in)

0

1

2

3

4

5

FLOPPY

HDDLED

Intel I/O

2Mbit

Controller

Firmware

PCI_FAN

Hub

Hub

(ICH2)

R272

SW1801

BUZZER

IR

PANEL

USB

Figure 2-2 Motherboard Layout

The audio codec, external and internal audio connectors, and LAN features are optional components. The components are grayed out in the above motherboard layout.

2-2	Chapter 2: Hardware information

2.3Before you proceed

Take note of the following precautions before you install motherboard components or change any motherboard settings.

1. Unplug the power cord from the wall socket before touching any component.

2.Use a grounded wrist strap or touch a safely grounded object or to a metal object, such as the power supply case, before handling components to avoid damaging them due to static electricity.

3.Hold components by the edges and do not to touch the ICs on them.

4.Whenever you uninstall any component, place it on a grounded antistatic pad or in the bag that came with the component.

5.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.

When lit, the onboard LED indicates that the system is in suspend or soft-off mode, not powered OFF. See the illustration below.

P4B-MX

ON

OFF

Standby

Powered

Power

Off

P4B-MX Onboard LED

Figure 2-3 Onboard Power LED

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2.4Central Processing Unit (CPU)

2.4.1 Overview

The motherboard comes with a surface mount 478-pin Zero Insertion Force (ZIF) socket. This socket is specifically designed for the Intel® Pentium® 4 478/Northwood Processor.

The Intel Pentium 4 Processor in the 478-pin package uses the Flip-Chip Pin Grid Array 2 (FC-PGA2) package technology, and includes the Intel® NetBurst™ micro-architecture. The Intel NetBurst micro-architecture features the hyper-pipelined technology, rapid execution engine, 400MHz system bus, and execution trace cache. Together, these attributes improve system performance by allowing higher processor frequencies, faster execution of integer instructions, and a data transfer rate of 3.2GB/s.

Gold Mark

Figure 2-4 Intel Pentium 4 478/Northwood Processor

Note in the illustration that the CPU has a gold triangular mark on one corner. This mark indicates the processor Pin 1 that should match a specific corner of the CPU socket.

Incorrect installation of the CPU into the socket may bend the pins and severely damage the CPU!

2-4	Chapter 2: Hardware information

2.4.2 Installing the CPU

Follow these steps to install a CPU.

1. Locate the 478-pin ZIF socket on the motherboard.

Figure 2-5 Intel 478-pin ZIF Socket

2.Unlock the socket by pressing the lever sideways, then lift it up to a 90°-100° angle.

Socket Lever

90 - 100

Figure 2-6 CPU Socket Lever at 90° -100° Angle

Make sure that the socket lever is lifted up to 90°-100° angle, otherwise the CPU does not fit in completely.

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2-5

3.Position the CPU above the socket such that its marked corner matches the base of the socket lever.

4.Carefully insert the CPU into the socket until it fits in place.

The CPU fits only in one correct orientation. DO NOT force the CPU into the socket to prevent bending the pins and damaging the CPU!

Gold Mark

Figure 2-7 Installing the CPU

5.When the CPU is in place, press it firmly on the socket while you push down the socket lever to secure the CPU. The lever clicks on the side tab to indicate that it is locked.

Figure 2-8

Installed CPU

2-6	Chapter 2: Hardware information

2.4.3 Installing the heatsink and fan

The Intel® Pentium® 4 478/Northwood Processor requires a specially designed heatsink and fan assembly to ensure optimum thermal condition and performance.

When you buy a boxed Intel Pentium 4 478/Northwood Processor, the package includes the heatsink, fan, and retention mechanism.

In case you buy a CPU separately, make sure that you use only Intel certified heatsink and fan.

Follow these steps to install the CPU heatsink and fan.

1.Place the heatsink on top of the installed CPU, making sure that the heatsink fits properly on the retention module base.

The retention module base is already installed on the motherboard.

CPU Heatsink

Retention Module Base

Figure 2-9 Installing the CPU Heatsink

Your boxed Intel Pentium 4 478/Northwood Processor package should come with installation instructions for the CPU, heatsink, and the retention mechanism. If the instructions in this section do not match the CPU documentation, follow the latter.

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2.Position the fan with the retention mechanism on top of the heatsink. Align and snap the four hooks of the retention mechanism to the holes on each corner of the module base.

Make sure that the fan and retention mechanism assembly perfectly fits the heatsink and module base, otherwise you cannot snap the hooks into the holes.

Retention Hole

Retention Lock

Retention Hook Snapped to the Retention Hole

Figure 2-10 Installing the Fan and Retention Mechanism

Keep the retention locks lifted upward while fitting the retention mechanism to the module base.

2-8	Chapter 2: Hardware information

3.Push down the locks on the retention mechanism to secure the heatsink and fan to the module base.

When secure, the retention locks should point to opposite directions.

Figure 2-11 Fan and Retention Mechanism Installed and Locked

2.4.4 Connecting the CPU fan cable

When the fan, heatsink, and the retention mechanism are in place, connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN.

CPU Fan Connector

(CPU_FAN)

Figure 2-12 CPU Fan Connector

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2-9

2.5System memor y

2.5.1 Overview

The motherboard comes with three Single Data Rate (SDR) Dual Inline Memory Module (DIMM) sockets. These sockets support up to 3GB system memory using unbuffered ECC or non-ECC PC100/133 DIMMs.

88 Pins

60 Pins

P4B-MX

20 Pins

P4B-MX 168-Pin DIMM Sockets

Figure 2-13 DIMM Sockets Location and SDR DIMMs

DIMMs are keyed with notches so that they fit in only one direction. DO NOT force a DIMM into a socket to avoid damaging the DIMM.

2.5.2 Memory configurations

Install DIMMs in any of the following combinations.

DIMM Location	168-pin DIMM (SDR)	Total Memory
Socket 1 (Rows 0&1) 64MB, 128MB, 256MB, 512MB, 1GB		x1
Socket 2 (Rows 2&3) 64MB, 128MB, 256MB, 512MB, 1GB		x1
Socket 3 (Rows 4&5) 64MB, 128MB, 256MB, 512MB, 1GB		x1
Total system memory (Max. 3GB)		=

2-10	Chapter 2: Hardware information