Gigabyte GA-8S661GXM-775 User manual

GA-8S661GXM-775(rev. 2.0)
Intel®Pentium® 4 LGA775 Processor Motherboard
User's Manual
Rev. 2001
12ME-S661GXMT-2001R
* The WEEE marking on the product indicates this product must not be disposed of with user's other household waste
and must be handed over to a designated collection point for the recycling of waste electrical and electronic equipment!!
* The WEEE marking applies only in European Union's member states.

Motherboard
GA-8S661GXM-775(rev. 2.0)
Jan. 6, 2006
Jan. 6, 2006
Motherboard
GA-8S661GXM-775(rev. 2.0)

Copyright
© 2006 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved.
The trademarks mentioned in the manual are legally registered to their respective companies.
Notice
The written content provided with this product is the property of Gigabyte.
No part of this manual may be reproduced, copied, translated, or transmitted in any form or by any
means without Gigabyte's prior written permission. Specifications and features are subject to
change without prior notice.
Product Manual Classification
In order to assist in the use of this product, Gigabyte has categorized the user manual in the
following:
For quick installation, please refer to the "Hardware Installation Guide" included with the
product.
For detailed product information and specifications, please carefully read the
"Product User Manual".
For detailed information related to Gigabyte's unique features, please go to "Technology
Guide" section on Gigabyte's website to read or download the information you need.
For more product details, please click onto Gigabyte's website at www.gigabyte.com.tw

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Table of Contents
GA-8S661GXM-775(rev. 2.0) Motherboard Layout ....................................................... 6
Block Diagram ................................................................................................................ 7
Chapter 1 Hardware Installation ..................................................................................... 9
1-1 Considerations Prior to Installation .................................................................... 9
1-2 Feature Summary .......................................................................................... 10
1-3 Installation of the CPU and Heatsink .............................................................. 12
1-3-1 Installation of the CPU ......................................................................................... 12
1-3-2 Installation of the Heatsink .................................................................................. 13
1-4 Installation of Memory .................................................................................... 14
1-5 Installation of Expansion Cards ...................................................................... 15
1-6 I/O Back Panel Introduction ........................................................................... 16
1-7 Connectors Introduction .................................................................................. 17
Chapter 2 BIOS Setup................................................................................................. 27
The Main Menu (For example: BIOS Ver. : D1) ....................................................... 28
2-1 Standard CMOS Features ............................................................................. 30
2-2 Advanced BIOS Features .............................................................................. 32
2-3 IntegratedPeripherals ..................................................................................... 34
2-4 Power Management Setup ............................................................................. 36
2-5 PnP/PCI Configurations ................................................................................. 38
2-6 PC Health Status ........................................................................................... 39
2-7 MB Intelligent Tweaker (M.I.T.) ...................................................................... 41
2-8 Load Fail-Safe Defaults ................................................................................... 43
2-9 Load Optimized Defaults ................................................................................. 43
2-10 Set Supervisor/User Password ..................................................................... 44
2-11 Save & Exit Setup ......................................................................................... 45
2-12 Exit Without Saving ....................................................................................... 45

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Chapter 3 Drivers Installation ...................................................................................... 47
3-1 Install Chipset Drivers .................................................................................... 47
3-2 SoftwareApplications ..................................................................................... 48
3-3 Driver CD Information .................................................................................... 48
3-4 Hardware Information ..................................................................................... 49
3-5 Contact Us ..................................................................................................... 49
Chapter 4 Appendix .................................................................................................... 51
4-1 Unique Software Utilities ................................................................................ 51
4-1-1 EasyTune 5 Introduction ..................................................................................... 52
4-1-2 Xpress Recovery2 Introduction ......................................................................... 53
4-1-3 BIOS Flash Method Introduction ........................................................................ 55
4-1-4 Serial ATA BIOS Setting Utility Introduction ...................................................... 64
4-1-5 2 / 4 / 6 Channel Audio Function Introduction ................................................. 76
4-2 Troubleshooting ............................................................................................... 82

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GA-8S661GXM-775(rev. 2.0) Motherboard Layout
GA-8S661GXM-775
KB_MS
COMA
LPT
LGA775
CPU_FAN
ATX FDD
VGA
COMB
ATX_12V
SPDIFO
CI
PWR_LED
PCI3
F_USB2
BIOS
F_PANEL
SiS 964
F_USB1
BATTERY
PCI2
CODEC
SUR_CEN
CLR_CMOS
CD_IN
SATA1
SATA0
F_AUDIO
USB
IDE2 IDE1
SYS _FAN
AGP
DDR1
SiS 661GX
PCI1
IT8705
LAN
AUDIO
R_USB
DDR2
ICS1883

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Block Diagram
LGA775
Processor
SiS 661GX
SiS 964
CPUCLK+/- (133MHz)
Host
Interface
DDR RAM
266/333/400MHz
HCLK+/- (133MHz)
24 MHz
33 MHz
LPC BUS
AGP 4X/8X
AGPCLK
(66MHz)
3 PCI
PCICLK
(33MHz)
AC97 Link
8 USB
Ports
ATA33/66/
100/133 IDE
Channels
Floppy
LPT Port
PS/2 KB/Mouse
COM Ports
IT8705
BIOS
ICS1883
AC97
CODEC
MIC
LINE-IN
LINE-OUT
RJ45
VGA Port
2 Serial ATA
33MHz
133MHz
48MHz
14.318MHz

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Hardware Installation- 9 -
English
1-1 Considerations Prior to Installation
Preparing Your Computer
The motherboard contains numerous delicate electronic circuits and components which can
become damaged as a result of electrostatic discharge (ESD). Thus, prior to installation, please
follow the instructions below:
1. Please turn off the computer and unplug its power cord.
2. When handling the motherboard, avoid touching any metal leads or connectors.
3. It is best to wear an electrostatic discharge (ESD) cuff when handling electronic components
(CPU, RAM).
4. Prior to installing the electronic components, please have these items on top of an antistatic pad or
within a electrostatic shielding container.
5. Please verify that the power supply is switched off before unplugging the power supply connector
from the motherboard.
Installation Notices
1. Prior to installation, please do not remove the stickers on the motherboard. These stickers are required
for warranty validation.
2. Prior to the installation of the motherboard or any hardware, please first carefully read the information
in the provided manual.
3. Before using the product, please verify that all cables and power connectors are connected.
4. To prevent damage to the motherboard, please do not allow screws to come in contact with the
motherboard circuit or its components.
5. Please make sure there are no leftover screws or metal components placed on the motherboard or
within the computer casing.
6. Please do not place the computer system on an uneven surface.
7. Turning on the computer power during the installation process can lead to damage to system
components as well as physical harm to the user.
8. If you are uncertain about any installation steps or have a problem related to the use of the product,
please consult a certified computer technician.
Instances of Non-Warranty
1. Damage due to natural disaster, accident or human cause.
2. Damage as a result of violating the conditions recommended in the user manual.
3. Damage due to improper installation.
4. Damage due to use of uncertified components.
5. Damage due to use exceeding the permitted parameters.
6. Product determined to be an unofficial Gigabyte product.
Chapter 1 Hardware Installation

GA-8S661GXM-775(rev. 2.0) Motherboard - 10 -
English
CPU Supports LGA775 Intel®Pentium®4 Processor (Note 1)
L2 cache varies with CPU
Front Side Bus Supports 533MHz FSB
Chipset Northbridge: SiS®661GX Chipset
Southbridge: SiS®964
LAN Onboard ICS1883 chip (10/100Mbit)
Audio Onboard Realtek ALC653 chip
Supports 2 / 4 / 6 channel audio
Supports SPDIF Out connection
Supports CD In connection
Storage SiS®964 Southbrigde
- 1 FDD connector, allowing connection of 2 FDD devices
- 2 IDE connectors (IDE1, IDE2) with UDMA 33/ATA 66/ATA 100/ATA 133
suppport, allowing connection of 4 IDE devices
- 2 SATA connectors (SATA0, SATA1), allowing connection of 2 SATA devices
- Supports data striping (RAID 0), mirroring (RAID 1) and JBOD for Serial ATA
O.S Support Microsoft Windows 2000/XP
Memory 2 DDR DIMM memory slots (supports up to 2GB memory)
Supports DDR 400/333/266 DIMMs
Supports 2.5V DDR DIMMs
Expanstion Slots 1 AGP slot
3 PCI slots
Internal Connectors 1 20-pin ATX power connector
1 4-pin ATX 12V power connector
1 floppy connector
2 IDE connectors
2 SATA connectors
1 CPU fan connector
1 system fan connector
1 front panel connector
1 front audio connector
1 CD In connector
1 SPDIF Out connector
1 COMB connector
1 power LED connector
1 Surround Center connector
2 USB 2.0/1.1 connectors for additional 4 ports by cables
1-2 Feature Summary

Hardware Installation- 11 -
English
Rear Panel I/O 1 PS/2 keyboard port
1 PS/2 mouse port
1 parallel port
1 serial port (COMA)
1 VGA port
4 USB 2.0/1.1 ports
1 RJ-45 port
3 audio jacks (Line In / Line Out / MIC In)
I/O Control IT8705 chip
Hardware Monitor System voltage detection
CPU temperature detection
CPU / System fan speed detection
CPU smart fan control
BIOS 1 4Mbit flash ROM
Use of licensed AWARD BIOS
Additional Features Supports @BIOS
Supports Download Center
Supports Q-Flash
Supports EasyTune (Note 2)
Supports Xpress Install
Supports Xpress Recovery2
Supports Xpress Rescue
Bundle Software Norton Internet Security (OEM version)
Form Factor Micro ATX form factor; 24.4cm x 23.0cm
(Note 1) For further CPU support information, please go to GIGABYTE's website.
(Note 2) EasyTune functions may vary depending on different motherboards.

GA-8S661GXM-775(rev. 2.0) Motherboard - 12 -
English
1-3 Installation of the CPU and Heatsink
Before installing the CPU, please comply with the following conditions:
1. Please make sure that the motherboard supports the CPU.
2. Please take note of the one indented corner of the CPU. If you install the CPU
in the wrong direction, the CPU will not insert properly. If this occurs, please change
the insert direction of the CPU.
3. Please add an even layer of heat sink paste between the CPU and heatsink.
4. Please make sure the heatsink is installed on the CPU prior to system use, otherwise
overheating and permanent damage of the CPU may occur.
5. Please set the CPU host frequency in accordance with the processor specifications. It is not
recommended that the system bus frequency be set beyond hardware specifications since it
does not meet the required standards for the peripherals. If you wish to set the frequency
beyond the proper specifications, please do so according to your hardware specifications
including the CPU, graphics card, memory, hard drive, etc.
HT functionality requirement content :
Enabling the functionality of Hyper-Threading Technology for your computer system requires all
of the following platform components:
- CPU: An Intel®Pentium 4 Processor with HT Technology
- Chipset: An SiS®Chipset that supports HT Technology
- BIOS: A BIOS that supports HT Technology and has it enabled
- OS: An operation system that has optimizations for HT Technology
1-3-1 Installation of the CPU
Fig. 1
Gently lift the metal
lever located on the
CPU socket to the
upright position.
Metal Lever Fig. 2
Remove the plastic
covering on the CPU
socket.
Fig. 3
Notice the small gold
colored triangle
located on the edge of
the CPU socket.
Align the indented
corner of the CPU with
Fig. 4
Once the CPU is
properly inserted,
please replace the
load plate and push the
metal lever back into
its original position.
the triangle and gently insert the CPU into position.
(Grasping the CPU firmly between your thumb
and forefinger, carefully place it into the socket in a
straight and downwards motion. Avoid twisting or
bending motions that might cause damage to the
CPU during installation.)

Hardware Installation- 13 -
English
1-3-2 Installation of the Heatsink
Fig.1
Please apply an even layer of heatsink paste on
the surface of the installed CPU.
The heatsink may adhere to the CPU as a result of hardening of the heatsink paste.To prevent
such an occurrence, it is suggested that either thermal tape rather than heat sink paste be used
for heat dissipation or using extreme care when removing the heatsink.
Fig. 6
Finally, please attach the power connector of the
heatsink to the CPU fan header located on the
motherboard.
Fig. 3
Place the heatsink atop the CPU and make sure
the push pins aim to the pin hole on the
motherboard.Pressing down the push pins
diagonally.
Fig. 2
(Turning the push pin along the direction of arrow
is to remove the heatsink, on the contrary, is to
install.)
Please note the direction of arrow sign on the male
push pin doesn't face inwards before installation.
(This instruction is only for Intel boxed fan)
Fig. 4
Please make sure the Male and Female push pin
are joined closely. (for detailed installation
instructions, please refer to the heatsink installation
section of the user manual)
Fig. 5
Please check the back of motherboard after
installing. If the push pin is inserted as the picture,
the installation is complete.
Male Push Pin
Female Push Pin
The top of Female Push Pin

GA-8S661GXM-775(rev. 2.0) Motherboard - 14 -
English
Before installing the memory modules, please comply with the following conditions:
1. Please make sure that the memory used is supported by the motherboard. It is recommended that
memory of similar capacity, specifications and brand be used.
2. Before installing or removing memory modules, please make sure that the computer
power is switched off to prevent hardware damage.
3. Memory modules have a foolproof insertion design. A memory module can be
installed in only one direction. If you are unable to insert the module, please switch the
direction.
1-4 Installation of Memory
The motherboard has 2 dual inline memory module (DIMM) sockets. The BIOS will automatically
detects memory type and size. To install the memory module, just push it vertically into the DIMM
socket. The DIMM module can only fit in one direction due to the notch. Memory size can vary between
sockets.
DDR memory module
notch
Fig.1
The DIMM socket has a notch, so the DIMM memory module
can only fit in one direction. Insert the DIMM memory module
vertically into the DIMM socket. Then push it down.
Fig.2
Close the plastic clip at both edges of the DIMM sockets to lock
the DIMM module.
Reverse the installation steps when you wish to remove the
DIMM module.
Fig. 1
Fig. 2

Hardware Installation- 15 -
English
1-5 Installation of Expansion Cards
You can install your expansion card by following the steps outlined below:
1. Read the related expansion card's instruction document before installing the expansion card into
the computer.
2. Remove your computer's chassis cover, screws and slot bracket from the computer.
3. Press the expansion card firmly into expansion slot in motherboard.
4. Be sure the metal contacts on the card are indeed seated in the slot.
5. Replace the screw to secure the slot bracket of the expansion card.
6. Replace your computer's chassis cover.
7. Power on the computer, if necessary, setup BIOS utility of expansion card from BIOS.
8. Install related driver from the operating system.
Installing a AGP expansion card:
Please carefully pull out the small white-
drawable bar at the end of the AGP slot
when you try to install/uninstall the VGA
card. Please align the VGA card to the
onboard AGP slot and press firmly down
on the slot. Make sure your VGA card is
locked by the small white-drawable bar.

GA-8S661GXM-775(rev. 2.0) Motherboard - 16 -
English
1-6 I/O Back Panel Introduction
PS/2 Keyboard and PS/2 Mouse Connector
To install a PS/2 port keyboard and mouse, plug the mouse to the upper port (green) and the keyboard to the
lower port (purple).
Parallel Port
The parallel port allows connection of a printer, scanner and other peripheral devices.
Serial Port(COMA)
Devices like mouses, modems, and etc. can be connected to Serial port.
VGA Port
Monitor can be connected to VGA port.
USB port
Before you connect your device(s) into USB connector(s), please make sure your device(s) such
as USB keyboard, mouse, scanner, zip, speaker...etc. have a standard USB interface. Also make
sure your OS supports USB controller. If your OS does not support USB controller, please contact
OS vendor for possible patch or driver upgrade. For more information please contact your OS or
device(s) vendors.
LAN Port
The LAN port provides Internet connection.
Line In
Devices like CD-ROM, walkman etc. can be connected to Line In jack.
Line Out
Connect the stereo speakers, earphone or front surround channels to this connector.
MIC In
Microphone can be connected to MIC In jack.

Hardware Installation- 17 -
English
1-7 Connectors Introduction
31 2
9
6
8
10
4
5
11
1413
17
1612
15
7
1) ATX_12V
2) ATX (Power Connector)
3) CPU_FAN
4) SYS_FAN
5) FDD
6) IDE1 / IDE2
7) SATA0 / SATA1
8) F_PANEL
9) PWR_LED
10) F_AUDIO
11) CD_IN
12) SPDIFO
13) SUR_CEN
14) F_USB1 / F_USB2
15) COMB
16) CI
17) CLR_CMOS
18) BATTERY
18

GA-8S661GXM-775(rev. 2.0) Motherboard - 18 -
English
31
4
1/2) ATX_12V/ATX (Power Connector)
With the use of the power connector, the power supply can supply enough stable power to all the
components on the motherboard. Before connecting the power connector, please make sure that
all components and devices are properly installed. Align the power connector with its proper
location on the motherboard and connect tightly.
The ATX_12V power connector mainly supplies power to the CPU. If the ATX_12V power
connector is not connected, the system will not start.
Caution!
Please use a power supply that is able to handle the system voltage requirements. It is
recommended that a power supply that can withstand high power consumption be used (300W
or greater). If a power supply is used that does not provide the required power, the result can
lead to an unstable system or a system that is unable to start.
2
1
10
20
11
Pin No. Definition
1 GND
2 GND
3 +12V
4 +12V
Pin No. Definition
1 3.3V
2 3.3V
3 GND
4 +5V
5 GND
6 +5V
7 GND
8 Power Good
9 5V SB (stand by +5V)
10 +12V
11 3.3V
12 -12V
13 GND
14 PS_ON(soft on/off)
15 GND
16 GND
17 GND
18 -5V
19 +5V
20 +5V

Hardware Installation- 19 -
English
3/4) CPU_FAN / SYS_FAN (Cooler Fan Power Connector)
The cooler fan power connector supplies a +12V power voltage via a 3-pin/4-pin(only for CPU_FAN)
power connector and possesses a fool-proof connection design.
Most coolers are designed with color-coded power connector wires. A red power connector wire
indicates a positive connection and requires a +12V power voltage. The black connector wire is
the ground wire (GND).
Please remember to connect the power to the cooler to prevent system overheating and failure.
Caution! Please remember to connect the power to the CPU fan to prevent CPU overheating and
failure.
1
CPU_FAN
SYS_FAN
1
Pin No. Definition
1 GND
2 +12V
3 Sense
4 Speed Control
(OnlyforCPU_FAN)
5) FDD (FDD Connector)
The FDD connector is used to connect the FDD cable while the other end of the cable connects to the
FDD drive. The types of FDD drives supported are: 360KB, 720KB, 1.2MB, 1.44MB and 2.88MB.
Please connect the red power connector wire to the pin1 position.
1
2
33
34

GA-8S661GXM-775(rev. 2.0) Motherboard - 20 -
English
6) IDE1/IDE2 (IDE Connector)
An IDE device connects to the computer via an IDE connector. One IDE connector can connect to
one IDE cable, and the single IDE cable can then connect to two IDE devices (hard drive or optical
drive). If you wish to connect two IDE devices, please set the jumper on one IDE device as Master
and the other as Slave (for information on settings, please refer to the instructions located on the
IDE device).
40
21
40 39
21
39
IDE2 IDE1
7) SATA0 / SATA1 (Serial ATA Connector, Controlled by SiS964)
Serial ATA can provide up to 150MB/s transfer rate. Please refer to the BIOS setting for the Serial
ATA and install the proper driver in order to work properly.
Pin No. Definition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
7
1