Intel System Board G4H875-B, G4H875-C, G4H875-N User Manual

935-G4H875-000

A77100333

G4H875-N

G4H875-C

G4H875-B

Rev. A+ System Board User’s Manual

This publication contains information that is protected by copyright. No par t of it may be reproduced in any for m or by any means or used to make any transformation/adaptation without the prior written per mission from the copyright holder s.

This publication is provided for informational purposes only. The manufacturer makes no representations or warranties with respect to the contents or use of this manual and specifically disclaims any express or implied warranties of merchantability or fitness for any par ticular pur pose. The user will assume the entire risk of the use or the results of the use of this document. Fur ther, the manufacturer reser ves the right to revise this publication and make changes to its contents at any time, without obligation to notify any person or entity of such revisions or changes.

Trademarks

Windows® 98 SE, Windows® ME, Windows® 2000, Windows NT

4.0 and Windows® XP are registered trademarks of Microsoft Corporation. Intel®, Pentium® 4 and Celeron are registered trademarks of Intel Corporation. Award is a registered trademark of Award Software, Inc. Other trademarks and registered trademarks of products appearing in this manual are the properties of their respective holders.

Caution

To avoid damage to the system:

• Use the correct AC input voltage range

To reduce the r isk of electr ic shock:

• Unplug the power cord before removing the system chassis cover for installation or servicing. After installation or servicing, cover the system chassis before plugging the power cord.

Battery:

• Danger of explosion if batter y incor rectly replaced.

• Replace only with the same or equivalent type recommend

the manufacturer.

• Dispose of used batteries according to the battery manufacturer’s

instructions.

Joystick or MIDI por t:

• Do not use any joystick or MIDI device that requires more than 10A current at 5V DC. There is a risk of fire for devices that exceed this limit.

FCC and DOC Statement on Class B

This equipment has been tested and found to comply with the limits for a Class B digital device, pur suant to Par t 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a par ticular 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 the receiver.

• Connect the equipment into 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.

Notice:

1. The changes or modifications not expressly approved by the par ty responsible for compliance could void the user's authority to operate the equipment.

2. Shielded interface cables must be used in order to comply with the emission limits.

Notice

An electronic file of this manual is included in the CD. To view the user’s manual, insert the CD into a CD-ROM drive. The autorun screen (Main Board Utility CD) will appear. Click “User’s Manual” on the main menu.

Table of Contents

Chapter 1 - Introduction

1.1 Features and Specifications..................................................................................

1.2 Hyper-Threading Technology Functionality Requirements.....

1.3 Package Checklist.............................................................................................................

Chapter 2 - Hardware Installation

2.1 System Board Layout .............................................................................................

2.2 System Memor y..............................................................................................................

2.3 CPU...............................................................................................................................................

2.4 Jumper Settings................................................................................................................

2.5 Rear Panel I/O Ports.................................................................................................

2.6 I/O Connectors...............................................................................................................

Chapter 3 - BIOS Setup

3.1 Award BIOS Setup Utility.................................................................................

3.2 Updating the BIOS..................................................................................................

Chapter 4 - Supported Softwares

4.1 Desktop Management Interface......................................................................

4.2 Driver s, Utilities and Software Applications.....................................

4.3 Installation Notes.............................................................................................................

7 15 15

16 19 24 29 35 44

100

102 105 113

Introduction

Appendix A - Enabling the Hyper-Threading

Technology

A.1 Enabling the Hyper-Threading Technology.........................................

Appendix B - CPU Fan Protection

B.1 CPU Fan Protection.............................................................................................

Appendix C - CPU Temperature Protection

C.1 CPU T emperature Protection.......................................................................

Appendix D - System Error Messages

D.1 POST Beep..................................................................................................................

D.2 Error Messages..........................................................................................................

Appendix E - Troubleshooting

E.1 Troubleshooting Checklist..............................................................................

114

117

118

119 119

121

Introduction

1.1 Features and Specifications

1.1.1 Features

Chipset

• Intel® 875P chipset

- Intel® 82875P Memor y Controller Hub (MCH)

- Intel® Hance Rapids I/O Controller Hub

Processor

The system board is equipped with Socket 478 for installing one of the following suppor ted processors.

• Intel® Pentium® 4 (Prescott and Northwood) processor up to

3.2GHz+

- Intel Hyper-Threading Technology

- FSB: 533MHz and 800MHz

• Intel® Celeron® processor

- 400MHz system data bus

System Memory

• Suppor ts dual channel (128-bit wide) memory interface

- Each channel suppor ts 2 DIMM sockets

• Suppor ts up to 4GB system memor y

• Suppor ts Dynamic mode to optimize system perfor mance

• Synchronous operation with processor system bus

- PC2100/PC2700/PC3200 (DDR266/DDR333/DDR400) with 800MHz FSB CPU (suppor ts PAT mode). DDR333 will run at 320MHz memory frequency when used with 800MHz FSB CPU.

- Use PC2100/PC2700 (DDR266/DDR333) with 533MHz FSB CPU

- Use PC2100 (DDR266) with 400MHz FSB CPU

• Suppor ts ECC/non-ECC DIMMs

• Supports unbuffered DIMMs

Chapter 1 - Introduction

Introduction

Performance Acceleration Technology (P AT)

PAT mode is supported only when the system uses DDR400 with 800MHz FSB CPU. PAT performs data transactions directly from the CPU to the system memory, bypassing the normal path of operation. This reduces the MCH timing therefore providing improved system performance.

Expansion Slots

• 1 AGP slot

• 4 PCI slots

• 1 PCI-X 64-bit/66MHz slot

AGP (Accelerated Graphics Port)

• Suppor ts AGP 3.0 (AGP 4x and 8x) and AGP 2.0 (AGP 1x and 4x) spec.

• Supports 1.5V AGP 8x (2.13GB/sec.) and AGP 4x (1066MB/ sec.) add-in cards.

AGP is an interface designed to support high performance 3D graphics cards for 3D graphics applications. It handles large amounts of graphics data with the following features:

• Pipelined memory read and write operations that hide

memor y access latency.

• Demultiplexing of address and data on the bus for nearly

100 percent efficiency.

Note:

AGP 2x and 3.3V AGP cards are not supported.

Density Width Single/Double 184-pin DDR

Density

128 Mbit

SS/DS

128/256MB

X16

SS/DS

64MB/NA

256 Mbit

SS/DS

256/512MB

X16

SS/DS

128MB/NA

512 Mbit

SS/DS

512/1024MB

X16

SS/DS

256MB/NA

Introduction

Onboard Audio Features

• 18-bit stereo full-duplex codec with independent variable sampling rate

• High quality differential CD input

• Tr ue stereo line level outputs

• 2-channel audio output

Onboard LAN Features

• 82547EI Gigabit LAN CSA interface (G4H875-N only)

- Integrated power management functions

- Full duplex suppor t at both 10, 100 and 1000 Mbps

- Supports IEEE 802.3u auto-negotiation

- Supports wire for management

• 82551QM fast ethernet controller (G4H875-N, G4H875-C and G4H875-B)

- Integrated IEEE 802.3, 10BASE-T and 100BASE-TX compat-

ible PHY

- Glueless 32-bit PCI master interface

- Glueless CardBus master interface

- 128 Kbyte Flash interface

- Thin BGA 15 mm2 package

Compatibility

• PCI 2.2 and AC ’97 compliant

• Intel AGP version 3.0

PCI Bus Master IDE Controller

• Supports ATA/33, ATA/66 and ATA/100 hard drives

• PIO Mode 4 Enhanced IDE (data transfer rate up to 14MB/sec.)

• Bus mastering reduces CPU utilization during disk transfer

• Suppor ts ATAPI CD-ROM, LS-120 and ZIP

IrDA Interface

The system board is equipped with an IrDA connector for wireless connectivity between your computer and peripheral devices. The IRDA (Infrared Data Association) specification supports data transfers of 115K baud at a distance of 1 meter.

Introduction

USB Ports

The system board supports USB 2.0 and USB 1.1 ports. USB 1.1 supports 12Mb/second bandwidth while USB 2.0 supports 480Mb/second bandwidth providing a marked improvement in device transfer speeds between your computer and a wide range of simultaneously accessible external Plug and Play peripherals.

BIOS

• Award BIOS, Windows® 98SE/2000/ME/XP Plug and Play compatible

• Supports DMI 2.0 function

• 4Mbit or 8Mbit flash memory

• Supports optional BIOS Write Protect function by hardware

Desktop Management Interface (DMI)

The system board comes with a DMI 2.0 built into the BIOS. The DMI utility in the BIOS automatically records various information about your system configuration and stores these information in the DMI pool, which is a part of the system board's Plug and Play BIOS. DMI, along with the appropriately networked software, is designed to make inventory, maintenance and troubleshooting of computer systems easier. Refer to chapter 4 for instr uctions on using the DMI utility.

Rear Panel I/O Ports (PC 99 color-coded connectors)

• 1 mini-DIN-6 PS/2 mouse port

• 1 mini-DIN-6 PS/2 keyboard port

• 2 DB-9 serial por ts

• 1 DB-25 parallel por t

• 4 USB 2.0/1.1 por ts (G4H875-N and G4H875-C only) 2 USB 2.0/1.1 por ts (G4H875-B only)

• 2 RJ45 LAN por ts (G4H875-N only) 1 RJ45 LAN por t (G4H875-B and G4H875-C only)

• 3 audio jacks: line-out, line-in and mic-in

Introduction

I/O Connectors

• 1 connector for 2 additional external USB 2.0/1.1 ports (G4H875-B only)

• 2 connector s for 2 external ser ial por ts (G4H875-N only)

• 1 front audio connector for external line-out and mic-in jacks

• 1 connector for an external game/MIDI port

• 2 internal audio connectors (CD-in and AUX-in)

• 1 connector for IrDA interface

• 2 Serial ATA connectors

• 2 IDE connectors

• 1 floppy connector

• 2 ATX power supply connectors

• 1 Wake-On-LAN connector

• CPU fan, chassis fan, second fan and NB fan connectors

1.1.2 System Health Monitor Functions

The system board is capable of monitoring the following “system health” conditions.

• Monitors CPU/system temperature and overheat alarm

• Monitors Vcore/VCC3/±12V/VCC/VBAT/5VSB voltages and failure alarm

• Monitors the fan speed of the chassis fan, CPU fan and NB fan; and failure alarm

• Read back capability that displays temperature, voltage and fan speed

Introduction

1.1.3 Intelligence

CPU Fan Protection

The CPU Fan Protection function has the capability of monitoring the CPU fan when the system boots. Once it has detected that the CPU fan did not rotate, 5 warning beeps will sound then the system will automatically power-off. This preventive measure has been added to protect the CPU from damage and insure a safe computing environment.

CPU Temperature Protection

The CPU Temperature Protection function has the capability of monitoring the CPU’s temperature during system boot-up. Once the system has detected that the CPU’s temperature exceeded the temperature limit defined in the BIOS, 5 warning beeps will sound then the system will automatically power-off.

Dual Function Power Button

Depending on the setting in the “Soft-Off By PWR-BTTN” field of the Power Management Setup, this switch will allow the system to enter the Soft-Off or Suspend mode.

Wake-On-Ring

This feature allows the system that is in the Suspend mode or Soft Power Off mode to wake-up/power-on to respond to calls coming from an external modem or respond to calls from a modem PCI card that uses the PCI PME (Power Management Event) signal to remotely wake up the PC.

Important:

If you are using a modem add-in card, the 5VSB power source of your power supply must support a minimum of ≥720mA.

Introduction

Wake-On-LAN

This feature allows the network to remotely wake up a Soft Power Down (Soft-Off) PC. It is supported via the onboard LAN por t, via a PCI LAN card that uses the PCI PME (Power Management Event) signal or via a LAN card that uses the Wake-On-LAN connector. However, if your system is in the Suspend mode , you can power-on the system only through an IRQ or DMA interr upt.

Important:

The 5VSB power source of your power supply must support

≥

720mA.

Wake-On-PS/2 Keyboard/Mouse

This function allows you to use the PS/2 keyboard or PS/2 mouse to power-on the system.

Important:

The 5VSB power source of your power supply must support

≥

720mA.

Wake-On-USB Keyboard

This function allows you to use a USB keyboard to wake up a system from the S3 (STR - Suspend To RAM) state.

Important:

• If you are using the Wake-On-USB Keyboard function for 2 USB ports, the 5VSB power source of your power supply must support ≥1.5A.

• If you are using the Wake-On-USB Keyboard function for 3 or more USB ports, the 5VSB power source of your power supply must support ≥2A.

RTC Timer to Power-on the System

The RTC installed on the system board allows your system to automatically power-on on the set date and time.

Introduction

ACPI

The system board is designed to meet the ACPI (Advanced Configuration and Power Interface) specification. ACPI has energy saving features that enables PCs to implement Power Management and Plug-and-Play with operating systems that suppor t OS Direct Power Management. Currently, only Windows

®®

98SE/2000/ME/XP suppor ts the ACPI function. ACPI when enabled in the Power Management Setup will allow you to use the Suspend to RAM function.

With the Suspend to RAM function enabled, you can power-off the system at once by pressing the power button or selecting “Standby” when you shut down Windows

®®

98SE/2000/ME/XP without having to go through the sometimes tiresome process of closing files, applications and operating system. This is because the system is capable of storing all programs and data files during the entire operating session into RAM (Random Access Memory) when it powers-off. The operating session will resume exactly where you left off the next time you power-on the system.

Important:

The 5VSB power source of your power supply must support

≥

1A.

AC Power Failure Recovery

When power returns after an AC power failure, you may choose to either power-on the system manually, let the system power-on automatically or return to the state where you left off before power failure occurs.

Introduction

1.2 Hyper-Threading Technology Functionality Requirements

Enabling the functionality of Hyper-Threading Technology for your computer system requires ALL of the following platforms.

Components:

• CPU - an Intel® Pentium® 4 Processor with HT Technology

• Chipset - an Intel® chipset that suppor ts HT Technology

• BIOS - a BIOS that suppor ts HT Technology and has it enabled

• OS - an operating system that includes optimizations for HT Technology

Please refer to Appendix A for information about enabling the functionality of the Hyper-Threading Technology. For more information on Hyper-Threading Technology, go to: www.intel.com/info/ hyperthreading.

1.3 Package Checklist

The system board package contains the following items:

! One system board ! One user’s manual ! One IDE cable ! One floppy cable ! One serial ATA data cable ! One I/O shield ! One “Main Board Utility” CD

If any of these items are missing or damaged, please contact your dealer or sales representative for assistance.

Hardware Installation

2.1 System Board Layout

Chapter 2 - Hardware Installation

G4H875-N

KB/Mouse

COM 1

COM 2

Parallel

LAN 1; USB 1-2

Intel

Gigabit

82547EI

Intel

82551QM

Line-out Line-in Mic-in

LAN 2; USB 3-4

Socket 478

PS/2 KB/Mouse power select (JP2)

USB 1-4 power select (JP3)

Intel

82875P

AGP

PCI Slot 1

PCI Slot 2

PCI Slot 3

Chassis

open (J6)

PCI Standby LED

BIOS

I/O

Game

AUX-in

CD-in

Audio Codec

Front audio

S/PDIF

IrDA

WOL

DIMM

Standby

LED

CPU fan

+12V power

2nd fan

DDR 1

DDR 2

DDR 1

DDR 2

Channel 0 Channel 1

AT X p ow er

IDE 2 IDE 1

Intel

Hance Rapids

S ATA 2

S ATA 1

FDD

Chassis

fan

ATX-SW

PWR-LED

COM 3

COM 4

RESET

SPEAKER

HD-LED

Battery

PCI-X Slot 1

Clear CMOS (JP5)

North bridge

fan

LED 1

LED 2

LED 4

LED 5

Diagnostic LEDs

PCI Slot 4

Power-on select (JP6)

BIOS Write Protect (SW1)

Hardware Installation

KB/Mouse

COM 1

COM 2

Parallel

LAN; USB 1-2

Intel

82551QM

Line-out Line-in Mic-in

USB 3-4

Socket 478

PS/2 KB/Mouse power select (JP2)

USB 1-4 power select (JP3)

Intel

82875P

AGP

PCI Slot 1

PCI Slot 2

PCI Slot 3

Chassis

open (J6)

PCI Standby LED

BIOS

I/O

Game

AUX-in

CD-in

Audio Codec

Front audio

S/PDIF

IrDA

WOL

DIMM

Standby

LED

CPU fan

+12V power

2nd fan

DDR 1

DDR 2

DDR 1

DDR 2

Channel 0 Channel 1

AT X p ow er

IDE 2 IDE 1

Intel

Hance Rapids

SATA 2

SATA 1

FDD

Chassis

fan

ATX-SW

PWR-LED

RESET

SPEAKER

HD-LED

Battery

PCI-X Slot 1

Clear CMOS (JP5)

North bridge

fan

LED 1

LED 2

LED 4

LED 5

Diagnostic LEDs

PCI Slot 4

Power-on select (JP6)

BIOS Write Protect (SW1)

G4H875-C

Hardware Installation

G4H875-B

Note:

The illustrations on the following pages are based on the G4H875-N system board.

KB/Mouse

COM 1

COM 2

Parallel

LAN 1; USB 1-2

Intel

82551QM

Line-out Line-in Mic-in

Socket 478

PS/2 KB/Mouse power select (JP2)

USB 1-2 power select (JP3)

Intel

82875P

AGP

PCI Slot 1

PCI Slot 2

PCI Slot 3

Chassis

open (J6)

PCI Standby LED

USB 3-4 power select (JP4)

USB 3-4

BIOS

I/O

Game

AUX-in

CD-in

Audio Codec

Front audio

S/PDIF

IrDA

WOL

DIMM

Standby

LED

CPU fan

+12V power

2nd fan

DDR 1

DDR 2

DDR 1

DDR 2

Channel 0 Channel 1

AT X p ow er

IDE 2 IDE 1

Intel

Hance Rapids

SATA 2

SATA 1

FDD

Chassis

fan

ATX-SW

PWR-LED

RESET

SPEAKER

HD-LED

Battery

PCI-X Slot 1

Clear CMOS (JP5)

North bridge

fan

LED 1

LED 2

LED 4

LED 5

Diagnostic LEDs

PCI Slot 4

Power-on select (JP6)

BIOS Write

Protect (SW1)

Hardware Installation

2.2 System Memory

Warning:

Electrostatic discharge (ESD) can damage your system board, processor, disk drives, add-in boards, and other components. Perform the upgrade instruction procedures described at an ESD workstation only. If such a station is not available, you can provide some ESD protection by wearing an antistatic wrist strap and attaching it to a metal part of the system chassis. If a wrist strap is unavailable, establish and maintain contact with the system chassis throughout any procedures requiring ESD protection.

The system board supports DDR SDRAM DIMM. Double Data Rate SDRAM (DDR SDRAM) is a type of SDRAM that doubles the data rate through reading and writing at both the rising and falling edge of each clock. This effectively doubles the speed of operation therefore doubling the speed of data transfer.

The four DDR DIMM sockets on the system board are divided into 2 channels:

Channel 0 - DDR 1 and DDR 2 Channel 1 - DDR 1 and DDR 2

DDR 1 DDR 2

Channel 0

Channel 1

Hardware Installation

The system board supports the following memory interface.

Single Channel (SC)

Data will be accessed in chunks of 64 bits (8B) from the memory channels.

Virtual Single Channel (VSC)

If both channels are populated with different memor y configurations, the MCH defaults to Virtual Single Channel.

Dual Channel (DC)

Dual channel provides better system performance because it doubles the data transfer rate.

Dynamic Mode Addressing

This mode minimizes the overhead of opening/closing pages in memor y banks allowing for row switching to be done less often.

• DIMMs are on the same channel.

• DIMMs in a channel can be identical or

completely different.

• Not all slots need to be populated.

• DIMMs of different memory configura-

tions are on different channels.

• Odd number of slots can be populated.

• DIMMs of the same memory configuration are on different channels.

• In single channel, requires even number or rows (side of the DIMM) populated. This mode can be enabled with 1 SS, 2 SS or 2 DS.

• In VSC mode, both channels must have identical row structure.

Single Channel

Virtual Single Channel

Dual Channel

Dynamic Mode Addressing

Hardware Installation

The table below lists the various optimal operating modes that should be configured for the memory channel oper ation.

Config

No memory Single channel A Single channel A Single channel A Single channel B Single channel B Single channel B Virtual single channel Virtual single channel Virtual single channel Virtual single channel Virtual single channel Virtual single channel Virtual single channel Virtual single channel Virtual single channel Dual channel Dual channel Dual channel

DDR 1

E P P E E E E E E E

P P(**) p(**)

P P(**) P(**)

P(*)(1,3) P(*)(1,3)

DDR 2

E E P P E E E

P(**)

E E E

P(**)

P(*)(2,4)

DDR 3

E E E

E P P

P(**) P(**)

P(*)(1,3) P(*)(1,3)

DDR 4

E E E E

E P P

P(**)

E P

P(**)

P(*)(2,4)

Continued on the next page...

BIOS Setting

Configure the system memory in the Advanced Chipset Features submenu of the BIOS.

Hardware Installation

Config

Dynamic Mode Addressing

DDR 1

P(*)(1,3)

DDR 2

P(*)(2,4)

DDR 3

P(*)(1,3)

DDR 4

P(*)(2,4)

P - denotes populated E - denotes empty * - denotes DIMMs are identical ** - denotes DIMMs are not identical SS - denotes Single Sided DIMM DS - denotes Double Sided DIMM 1, 2, 3 or 4 - denotes the DDR DIMM slot

Hardware Installation

2.2.1 Installing the DIM Module

A DIM module simply snaps into a DIMM socket on the system board. Pin 1 of the DIM module must correspond with Pin 1 of the socket.

1. Pull the “tabs” which are at the ends of the socket to the side .

2. Position the DIMM above the socket with the “notch” in the module aligned with the “key” on the socket.

3. Seat the module vertically into the socket. Make sure it is completely seated. The tabs will hold the DIMM in place .

Pin 1

Notch Key

Tab

Hardware Installation

2.3 CPU

2.3.1 Overview

The system board is equipped with a surface mount 478-pin CPU socket. This socket is exclusively designed for installing an Intel processor.

2.3.2 Installing the CPU

1. Locate Socket 478 on the system board.

2. Unlock the socket by pushing the lever sideways, away from the socket, then lifting it up to a 90o angle. Make sure the socket is lifted to at least this angle otherwise the CPU will not fit in properly.

Lever

Hardware Installation

3. Position the CPU above the socket then align the gold mar k on the corner of the CPU (designated as pin 1) with pin 1 of the socket.

Important:

Handle the CPU by its edges and avoid touching the pins.

Gold mar k

4. Insert the CPU into the socket until it is seated in place. The CPU will fit in only one orientation and can easily be inserted without exer ting any force.

Important:

Do not force the CPU into the socket. Forcing the CPU into the socket may bend the pins and damage the CPU.

Pin 1

Hardware Installation

5. Once the CPU is in place, push down the lever to lock the socket. The lever should click on the side tab to indicate that the CPU is completely secured in the socket.

2.3.3 Installing the Fan and Heat Sink

The CPU must be kept cool by using a CPU fan with heatsink. Without sufficient air circulation across the CPU and heat sink, the CPU will overheat damaging both the CPU and system board.

Note:

• Only use Intel® certified fan and heat sink.

• An Intel® boxed processor package contains a retention

mechanism, heat sink, fan and installation guide. If the installation procedure in the installation guide differs from the one in this section, please follow the installation guide in the package.

• If you are installing a non-boxed processor, the heat sink, fan and retention mechanism assembly may look different from the one shown in this section but the procedure will more or less be the same.

Hardware Installation

1. The system board comes with the retention module base already installed.

Retention

module base

Retention

hole

Retention

hole

Retention

hole

Retention

hole

2. Position the fan / heat sink and retention mechanism assembly on the CPU, then align and snap the retention legs’ hooks to the retention holes at the 4 corner s of the retention module base.

Note:

You will not be able to snap the hooks into the holes if the fan / heat sink and retention mechanism assembly did not fit properly onto the CPU and retention module base.

Unsnapped

Fan / heat sink and retention mechanism assembly

Snapped

Hardware Installation

3. The retention levers at this time remains unlocked as shown in the illustration below.

Retention lever

4. Move the retention levers to their opposite directions then push them down. This will secure the fan / heat sink and retention mechanism assembly to the retention module base.

Note:

You will not be able to push the lever down if the direction is incorrect.

5. Connect the CPU fan’s cable connector to the CPU fan connector on the system board.

Hardware Installation

O N

2.4 Jumper Settings

2.4.1 Clearing CMOS Data

If you encounter the following,

a) CMOS data becomes corrupted. b) You forgot the supervisor or user password. c) You are unable to boot-up the computer system because the

processor’s ratio/clock was incorrectly set in the BIOS.

you can reconfigure the system with the default values stored in the ROM BIOS.

To load the default values stored in the ROM BIOS, please follow the steps below.

1. Power-off the system.

2. Set JP5 pins 2 and 3 to On. Wait for a few seconds and set JP5 back to its default setting, pins 1 and 2 On.

3. Now power-on the system. If your reason for clearing the CMOS data is due to incorrect

setting of the processor’s ratio/clock in the BIOS, please proceed to step 4.

2-3 On:

Clear CMOS Data

1-2 On: Normal

(default)

JP5

312

Hardware Installation

4. After powering-on the system, press <Del> to enter the main menu of the BIOS.

5. Select the Frequency/Voltage Control submenu and press <Enter>.

6. Set the “CPU Clock Ratio” or “CPU Clock” field to its default setting or an appropriate bus clock or frequency ratio. Refer to the Frequency/Voltage Control section in chapter 3 for more information.

7. Press <Esc> to return to the main menu of the BIOS setup utility. Select “Save & Exit Setup” and press <Enter>.

8. Type <Y> and press <Enter>.

+ 94 hidden pages

Intel System Board G4H875-B, G4H875-C, G4H875-N User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual