Gigabyte GA-G41M-Combo User manual

GA-G41M-Combo
LGA775 socket motherboard for Intel®Core™ processor family/
Intel®Pentium®processor family/Intel®Celeron®processor family
User's Manual
Rev. 1302
12ME-G41MC-1302R

Motherboard
GA-G41M-Combo
May 24, 2010
May 24, 2010
Motherboard
GA-G41M-Combo

Copyright
©2010 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved.
The trademarks mentioned in this manual are legally registered to their respective owners.
Disclaimer
Information in this manual is protected by copyright laws and is the property of GIGABYTE.
Changes to the specications and features in this manual may be made by GIGABYTE with-
out prior notice. No part of this manual may be reproduced, copied, translated, transmitted, or
published in any form or by any means without GIGABYTE's prior written permission.
Documentation Classications
In order to assist in the use of this product, GIGABYTE provides the following types of documentations:
For detailed product information, carefully read the User's Manual.
For instructions on how to use GIGABYTE's unique features, read or download the information
on/from the Support&Downloads\Motherboard\Technology Guide page on our website.
For product-related information, check on our website at:
http://www.gigabyte.com
Identifying Your Motherboard Revision
The revision number on your motherboard looks like this: "REV: X.X." For example, "REV: 1.0"
means the revision of the motherboard is 1.0. Check your motherboard revision before updating
motherboard BIOS, drivers, or when looking for technical information.
Example:

- 4 -
Table of Contents
GA-G41M-Combo Motherboard Layout ..........................................................................5
Chapter 1 Hardware Installation .....................................................................................6
1-1 Installation Precautions.................................................................................... 6
1-2 Product Specications...................................................................................... 7
1-3 Installing the CPU and CPU Cooler ................................................................. 9
1-3-1 Installing the CPU.....................................................................................................9
1-4 Installing the Memory..................................................................................... 10
1-4-1 Dual Channel Memory Conguration .....................................................................10
1-5 Installing an Expansion Card ......................................................................... 10
1-6 Back Panel Connectors.................................................................................. 11
1-7 Internal Connectors........................................................................................ 12
Chapter 2 BIOS Setup ..................................................................................................21
2-1 Startup Screen ............................................................................................... 21
2-2 The Main Menu .............................................................................................. 21
2-3 MB Intelligent Tweaker(M.I.T.)........................................................................ 22
2-4 Standard CMOS Features.............................................................................. 28
2-5 Advanced BIOS Features .............................................................................. 29
2-6 Advanced Chipset Features........................................................................... 31
2-7 Integrated Peripherals.................................................................................... 32
2-8 Power Management Setup............................................................................. 34
2-9 PnP/PCI Congurations ................................................................................. 36
2-10 PC Health Status............................................................................................ 36
2-11 Load Fail-Safe Defaults.................................................................................. 37
2-12 Load Optimized Defaults................................................................................ 38
2-13 Set Supervisor/User Password ...................................................................... 38
2-14 Save & Exit Setup .......................................................................................... 39
2-15 Exit Without Saving........................................................................................ 39
Chapter 3 Drivers Installation........................................................................................40
3-1 Installing Chipset Drivers ............................................................................... 40
Regulatory Statements..................................................................................................41

- 5 -
GA-G41M-Combo Motherboard Layout
KB_MS
COMA
CPU_FAN
LGA775
GA-G41M-Combo
CD_IN
F_AUDIO
AUDIO
B_BIOS
M_BIOS
IDE
SPDIF_O
DDR3_1
DDR3_2
BAT
ATX_12V
Intel®G41
Intel®ICH7
FDD
PCIEX16
VGA
USB_LAN
CLR_CMOS
CODEC
SYS_FAN
COMB
F_USB1
F_USB2
F_PANEL
SATA2_0
SATA2_1
SATA2_2
SATA2_3
Atheros
AR8151
R_USB
PCI2
PCI1
PCIEX1
LPT
iTE
IT8718F
ATX
DDR2_1
DDR2_2
Box Contents
GA-G41M-Combo motherboard One IDE cable
Motherboard driver disk Two SATA cables
User's Manual I/O Shield
The box contents above are for reference only and the actual items shall depend on the product package you obtain.
The box contents are subject to change without notice.

Hardware Installation - 6 -
1-1 Installation Precautions
The motherboard contains numerous delicate electronic circuits and components which can
become damaged as a result of electrostatic discharge (ESD). Prior to installation, carefully read
the user's manual and follow these procedures:
• Prior to installation, do not remove or break motherboard S/N (Serial Number) sticker or
warranty sticker provided by your dealer. These stickers are required for warranty validation.
• Always remove the AC power by unplugging the power cord from the power outlet before
installing or removing the motherboard or other hardware components.
• When connecting hardware components to the internal connectors on the motherboard,
make sure they are connected tightly and securely.
• When handling the motherboard, avoid touching any metal leads or connectors.
• It is best to wear an electrostatic discharge (ESD) wrist strap when handling electronic com-
ponents such as a motherboard, CPU or memory. If you do not have an ESD wrist strap,
keep your hands dry and rst touch a metal object to eliminate static electricity.
• Prior to installing the motherboard, please have it on top of an antistatic pad or within an
electrostatic shielding container.
• Before unplugging the power supply cable from the motherboard, make sure the power sup-
ply has been turned off.
• Before turning on the power, make sure the power supply voltage has been set according to
the local voltage standard.
• Before using the product, please verify that all cables and power connectors of your hard-
ware components are connected.
• To prevent damage to the motherboard, do not allow screws to come in contact with the
motherboard circuit or its components.
• Make sure there are no leftover screws or metal components placed on the motherboard or
within the computer casing.
• Do not place the computer system on an uneven surface .
• Do not place the computer system in a high-temperature environment.
• Turning on the computer power during the installation process can lead to damage to sys-
tem components as well as physical harm to the user.
• If you are uncertain about any installation steps or have a problem related to the use of the
product, please consult a certied computer technician.
Chapter 1 Hardware Installation

- 7 - Hardware Installation
1-2 Product Specications
CPU wSupport for an Intel®Core™ 2 Extreme processor/
Intel®Core™ 2 Quad processor/Intel®Core™ 2 Duo processor/
Intel®Pentium®processor/Intel®Celeron®processor in the LGA775 package
(Go to GIGABYTE's website for the latest CPU support list.)
wL2 cache varies with CPU
Front Side Bus w1333/1066/800 MHz FSB
Chipset w
North Bridge: Intel®G41 Express Chipset
w South Bridge: Intel®ICH7
Memory wDDR3:
- 2 x 1.5V DDR3 DIMM sockets supporting up to 4 GB of system memory
- Dual channel memory architecture
- Support for DDR3 1333(O.C.)/1066/800 MHz memory modules
wDDR2:
- 2 x 1.8V DDR2 DIMM sockets supporting up to 8 GB of system memory (Note 1)
- Dual channel memory architecture
- Support for DDR2 1066(O.C.)/800/667 MHz memory modules
(Note: Mixed mode, populating DDR2 and DDR3 memory modules simulta-
neously is not supported. Go to GIGABYTE's website for the latest supported
memory speeds and memory modules.)
Onboard Graphics wNorth Bridge:
- 1 x D-Sub port
Audio   w VIA VT1708S codec
w High Denition Audio
w 2/4/5.1-channel
    w Support for S/PDIF Out
w Support for CD In
LAN w1 x Atheros AR8151 chip (10/100/1000 Mbit)
Expansion Slots w1 x PCI Express x16 slot, running at x16
w1 x PCI Express x1 slot
w 2 x PCI slots
Storage Interface wSouth Bridge:
- 1 x IDE connector supporting ATA-100/66/33 and up to 2 IDE devices
- 4 x SATA 3Gb/s connectors supporting up to 4 SATA 3Gb/s devices
wiTE IT8718F chip:
- 1 x oppy disk drive connector supporting up to 1 oppy disk drive
USB wSouth Bridge:
- Up to 8 USB 2.0/1.1 ports (4 on the back panel, 4 via the USB brackets
connected to the internal USB headers)
Internal w1 x 24-pin ATX main power connector
Connectors w1 x 4-pin ATX 12V power connector
w 1 x oppy disk drive connector
w1 x IDE connector
w4 x SATA 3Gb/s connectors

Hardware Installation - 8 -
Internal w1 x CPU fan header
Connectors w1 x system fan header
w1 x front panel header
w1 x front panel audio header
w1 x CD In connector
w1 x S/PDIF Out header
w2 x USB 2.0/1.1 headers
w1 x serial port header
w1 x clearing CMOS jumper
Back Panel w1 x PS/2 keyboard port
Connectors w1 x PS/2 mouse port
w1 x parallel port
w1 x serial port
w
1 x D-Sub port
w4 x USB 2.0/1.1 ports
w1 x RJ-45 port
w3 x audio jacks (Line In/Line Out/Microphone)
I/O wiTE IT8718F
Hardware Monitor wSystem voltage detection
wCPU/System temperature detection
wCPU/System fan speed detection
wCPU overheating warning
wCPU/System fan fail warning
wCPU fan speed control (Note 2)
BIOS w 2 x 8 Mbit ash
wUse of licensed AWARD BIOS
wSupport for DualBIOS™
wPnP 1.0a, DMI 2.0, SM BIOS 2.4, ACPI 1.0b
Unique Features wSupport for @BIOS
wSupport for Q-Flash
wSupport for Xpress BIOS Rescue
wSupport for Download Center
wSupport for Xpress Install
wSupport for Xpress Recovery2
wSupport for EasyTune (Note 3)
wSupport for Easy Energy Saver (Note 4)
wSupport for SMART Recovery
wSupport for Auto Green
wSupport for ON/OFF Charge
wSupport for Q-Share
Bundled Software wNorton Internet Security (OEM version)
Operating System wSupport for Microsoft®Windows®7/Vista/XP

- 9 - Hardware Installation
(Note 1) Due to Windows 32-bit operating system limitation, when more than 4 GB of physical memory is
installed, the actual memory size displayed will be less than 4 GB.
(Note 2) Whether the CPU fan speed control function is supported will depend on the CPU cooler you install.
(Note 3) Available functions in EasyTune may differ by motherboard model.
(Note 4) Due to the hardware limitation, you must install the Intel
®
Core
TM
2 Extreme/Core
TM
2 Quad/Core
TM
2 Duo/
Pentium Dual-Core/Celeron Dual-Core/Celeron 400 Series CPU to enable support for Easy Energy Saver.
Form Factor wMicro ATX Form Factor; 24.4cm x 21.0cm
1-3 Installing the CPU and CPU Cooler
Read the following guidelines before you begin to install the CPU:
• Make sure that the motherboard supports the CPU.
(Go to GIGABYTE's website for the latest CPU support list.)
• Always turn off the computer and unplug the power cord from the power outlet before installing
the CPU to prevent hardware damage.
• Locate the pin one of the CPU. The CPU cannot be inserted if oriented incorrectly. (Or you may
locate the notches on both sides of the CPU and alignment keys on the CPU socket.)
• Apply an even and thin layer of thermal grease on the surface of the CPU.
• Do not turn on the computer if the CPU cooler is not installed, otherwise overheating and dam-
age of the CPU may occur.
• Set the CPU host frequency in accordance with the CPU specications. It is not recommended
that the system bus frequency be set beyond hardware specications since it does not meet the
standard requirements for the peripherals. If you wish to set the frequency beyond the standard
specications, please do so according to your hardware specications including the CPU, graph-
ics card, memory, hard drive, etc.
1-3-1 Installing the CPU
Locate the alignment keys on the motherboard CPU socket and the notches on the CPU.
Notch Notch
Alignment KeyAlignment Key
LGA775 CPU
LGA775 CPU Socket
Pin One Corner of the CPU Socket
Triangle Pin One Marking on the CPU

Hardware Installation - 10 -
DDR3_1
DDR3_2
DDR3/DDR2 Dual Channel Memory Conguration:
Due to chipset limitations, read the following guidelines before installing the memory in Dual Channel mode.
1. Dual Channel mode cannot be enabled if only one DDR3/DDR2 memory module is installed.
2. When enabling Dual Channel mode with two memory modules, it is recommended that memory of
the same capacity, brand, speed, and chips be used.
1-4 Installing the Memory
Read the following guidelines before you begin to install the memory:
•Make sure that the motherboard supports the memory. It is recommended that memory of the
same capacity, brand, speed, and chips be used.
(Go to GIGABYTE's website for the latest supported memory speeds and memory modules.)
•Always turn off the computer and unplug the power cord from the power outlet before installing
the memory to prevent hardware damage.
•Memory modules have a foolproof design. A memory module can be installed in only one direc-
tion. If you are unable to insert the memory, switch the direction.
• Populating DDR2 and DDR3 memory modules simultaneously is not supported. To ensure memory
compatibility, be sure to use the memory modules on the memory support list at GIGABYTE's website.
1-4-1 Dual Channel Memory Conguration
This motherboard provides two DDR2 and two DDR3 memory sockets and supports Dual Channel Technology.
The two DDR3 memory sockets (DDR3_1, DDR3_2) are divided into two channels and each channel has one
memory socket as following:
Channel 0: DDR3_1
Channel 1: DDR3_2
The two DDR2 memory sockets (DDR2_1, DDR2_2) are divided into two channels and each channel has one
memory socket as following:
Channel 0: DDR2_1
Channel 1: DDR2_2
DDR2_1
DDR2_2
1-5 Installing an Expansion Card
Read the following guidelines before you begin to install an expansion card:
•Make sure the motherboard supports the expansion card. Carefully read the manual that came
with your expansion card.
•Always turn off the computer and unplug the power cord from the power outlet before installing
an expansion card to prevent hardware damage.

- 11 - Hardware Installation
1-6 Back Panel Connectors
• When removing the cable connected to a back panel connector, rst remove the cable from your
device and then remove it from the motherboard.
• When removing the cable, pull it straight out from the connector. Do not rock it side to side to
prevent an electrical short inside the cable connector.
PS/2 Keyboard and PS/2 Mouse Port
Use the upper port (green) to connect a PS/2 mouse and the lower port (purple) to connect a PS/2 keyboard.
Parallel Port
Use the parallel port to connect devices such as a printer, scanner and etc. The parallel port is also
called a printer port.
Serial Port
Use the serial port to connect devices such as a mouse, modem or other peripherals.
D-Sub Port
The D-Sub port supports a 15-pin D-Sub connector. Connect a monitor that supports D-Sub connection to this port.
USB 2.0/1.1 Port
The USB port supports the USB 2.0/1.1 specication. Use this port for USB devices such as a USB key-
board/mouse, USB printer, USB ash drive and etc.
RJ-45 LAN Port
The Gigabit Ethernet LAN port provides Internet connection at up to 1 Gbps data rate. The following de-
scribes the states of the LAN port LEDs.
Activity LED:
State Description
Blinking Data transmission or receiving is occurring
Off No data transmission or receiving is occurring
Connection/Speed LED:
State Description
Orange 1 Gbps data rate
Green 100 Mbps data rate
Off 10 Mbps data rate
Activity LED
Connection/
Speed LED
LAN Port
Line In Jack (Blue)
The default line in jack. Use this audio jack for line in devices such as an optical drive, walkman, etc.
Line Out Jack (Green)
The default line out jack. Use this audio jack for a headphone or 2-channel speaker. This jack can be
used to connect front speakers in a 4/5.1-channel audio conguration.
Mic In Jack (Pink)
The default Mic in jack. Microphones must be connected to this jack.

Hardware Installation - 12 -
1-7 Internal Connectors
Read the following guidelines before connecting external devices:
• First make sure your devices are compliant with the connectors you wish to connect.
• Before installing the devices, be sure to turn off the devices and your computer. Unplug the
power cord from the power outlet to prevent damage to the devices.
• After installing the device and before turning on the computer, make sure the device cable has
been securely attached to the connector on the motherboard.
1) ATX_12V
2) ATX
3) CPU_FAN
4) SYS_FAN
5) FDD
6) IDE
7) SATA2_0/1/2/3
8) F_PANEL
9) F_AUDIO
10) CD_IN
11) SPDIF_O
12) F_USB1/F_USB2
13) COMB
14) CLR_CMOS
15) BAT
1
6
2
4
3
511
13
7
9
15
10
8
12
14

- 13 - Hardware Installation
Pin No. Denition
1 GND
2 GND
3 +12V
4 +12V
ATX_12V:
DEBUG
PORT
G.QBOFM
131
2412
ATX
ATX:
Pin No. Denition
13 3.3V
14 -12V
15 GND
16 PS_ON (soft On/Off)
17 GND
18 GND
19 GND
20 -5V
21 +5V
22 +5V
23 +5V (Only for 2x12-pin ATX)
24 GND (Only for 2x12-pin ATX)
Pin No. Denition
1 3.3V
2 3.3V
3 GND
4 +5V
5 GND
6 +5V
7 GND
8 Power Good
9 5VSB (stand by +5V)
10 +12V
11 +12V (Only for 2x12-pinATX)
12 3.3V (Only for 2x12-pin ATX)
1/2) ATX_12V/ATX (2x2 12V Power Connector and 2x12 Main Power Connector)
With the use of the power connector, the power supply can supply enough stable power to all the com-
ponents on the motherboard. Before connecting the power connector, rst make sure the power supply
is turned off and all devices are properly installed. The power connector possesses a foolproof design.
Connect the power supply cable to the power connector in the correct orientation. The 12V power con-
nector mainly supplies power to the CPU. If the 12V power connector is not connected, the computer will
not start.
To meet expansion requirements, it is recommended that a power supply that can withstand
high power consumption be used (500W or greater). If a power supply is used that does not
provide the required power, the result can lead to an unstable or unbootable system.
ATX_12V
1
3
2
4

Hardware Installation - 14 -
3/4) CPU_FAN/SYS_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN) and a 3-pin (SYS_FAN) system fan header.
Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect
it in the correct orientation (the black connector wire is the ground wire). The motherboard supports CPU
fan speed control, which requires the use of a CPU fan with fan speed control design. For optimum heat
dissipation, it is recommended that a system fan be installed inside the chassis.
•Be sure to connect fan cables to the fan headers to prevent your CPU and system from over-
heating. Overheating may result in damage to the CPU or the system may hang.
• These fan headers are not conguration jumper blocks. Do not place a jumper cap on the
headers.
CPU_FAN:
Pin No. Denition
1 GND
2 +12V
3 Sense
4 Speed Control
SYS_FAN:
Pin No. Denition
1 GND
2 +12V
3 Sense
5) FDD (Floppy Disk Drive Connector)
This connector is used to connect a oppy disk drive. The types of oppy disk drives supported are:
360 KB, 720 KB, 1.2 MB, 1.44 MB, and 2.88 MB. Before connecting a oppy disk drive, be sure to locate
pin 1 of the connector and the oppy disk drive cable. The pin 1 of the cable is typically designated by
a stripe of different color. For purchasing the optional oppy disk drive cable, please contact the local
dealer.
1
2
33
34
CPU_FAN
DEBUG
PORT
G.QBOFM
SYS_FAN
1
1

- 15 - Hardware Installation
6) IDE (IDE Connector)
The IDE connector supports up to two IDE devices such as hard drives and optical drives. Before attach-
ing the IDE cable, locate the foolproof groove on the connector. If you wish to connect two IDE devices,
remember to set the jumpers and the cabling according to the role of the IDE devices (for example,
master or slave). (For information about conguring master/slave settings for the IDE devices, read the
instructions from the device manufacturers.)
7) SATA2_0/1/2/3 (SATA 3Gb/s Connectors)
The SATA connectors conform to SATA 3Gb/s standard and are compatible with SATA 1.5Gb/s standard.
Each SATA connector supports a single SATA device.
Pin No. Denition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
12
3940
SATA2_0
SATA2_1
SATA2_2
SATA2_3
DEBUG
PORT
G.QBOFM
DEBUG
PORT
G.QBOFM
DEBUG
PORT
G.QBOFM
7
7
7
1
1
1
7
DEBUG
PORT
G.QBOFM
1
Please connect the L-shaped end of
the SATA cable to your SATA hard
drive.

Hardware Installation - 16 -
8) F_PANEL (Front Panel Header)
Connect the power switch, reset switch, speaker and system status indicator on the chassis front panel
to this header according to the pin assignments below. Note the positive and negative pins before con-
necting the cables.
The front panel design may differ by chassis. A front panel module mainly consists of power
switch, reset switch, power LED, hard drive activity LED, speaker and etc. When connecting your
chassis front panel module to this header, make sure the wire assignments and the pin assign-
ments are matched correctly.
DEBUG PORT
G.QBOFM
Power LED
1
2
19
20
CI-
CI+
PWR-
PWR+
MSG-
PW-
SPEAK+
SPEAK-
MSG+
PW+
Message/Power/
Sleep LED
Speaker
Power
Switch
HD-
RES+
HD+
RES-
Hard Drive
Activity LED
Reset
Switch
Chassis Intrusion
Header
•PW (Power Switch):
Connects to the power switch on the chassis front panel. You may congure the way to turn off your
system using the power switch (refer to Chapter 2, "BIOS Setup," "Power Management Setup," for
more information).
•SPEAK (Speaker):
Connects to the speaker on the chassis front panel. The system reports system startup status by is-
suing a beep code. One single short beep will be heard if no problem is detected at system startup. If
a problem is detected, the BIOS may issue beeps in different patterns to indicate the problem.
•HD (Hard Drive Activity LED)
Connects to the hard drive activity LED on the chassis front panel. The LED is on when the hard drive
is reading or writing data.
•RES (Reset Switch):
Connects to the reset switch on the chassis front panel. Press the reset switch to restart the computer
if the computer freezes and fails to perform a normal restart.
•CI (Chassis Intrusion Header):
Connects to the chassis intrusion switch/sensor on the chassis that can detect if the chassis cover
has been removed. This function requires a chassis with a chassis intrusion switch/sensor.
•MSG/PWR (Message/Power/Sleep LED):
Connects to the power status indicator on the chassis front panel. The LED
is on when the system is operating. The LED keeps blinking when the sys-
tem is in S1 sleep state. The LED is off when the system is in S3/S4 sleep
state or powered off (S5).
System Status LED
S0 On
S1 Blinking
S3/S4/S5 Off

- 17 - Hardware Installation
9) F_AUDIO (Front Panel Audio Header)
The front panel audio header supports Intel High Denition audio (HD) and AC'97 audio. You may connect
your chassis front panel audio module to this header. Make sure the wire assignments of the module con-
nector match the pin assignments of the motherboard header. Incorrect connection between the module
connector and the motherboard header will make the device unable to work or even damage it.
Pin No. Denition
1 MIC2_L
2 GND
3 MIC2_R
4 -ACZ_DET
5 LINE2_R
6 GND
7 FAUDIO_JD
8 No Pin
9 LINE2_L
10 GND
Pin No. Denition
1 MIC
2 GND
3 MIC Power
4 NC
5 Line Out (R)
6 NC
7 NC
8 No Pin
9 Line Out (L)
10 NC
For HD Front Panel Audio: For AC'97 Front Panel Audio:
210
1 9
10) CD_IN (CD In Connector)
You may connect the audio cable that came with your optical drive to the header.
Pin No. Denition
1 CD-L
2 GND
3 GND
4 CD-R
•The front panel audio header supports HD audio by default.
•Audio signals will be present on both of the front and back panel audio connections simultane-
ously.
•Some chassis provide a front panel audio module that has separated connectors on each wire
instead of a single plug. For information about connecting the front panel audio module that
has different wire assignments, please contact the chassis manufacturer.
1

Hardware Installation - 18 -
12) F_USB1/F_USB2 (USB Headers)
The headers conform to USB 2.0/1.1 specication. Each USB header can provide two USB ports via an
optional USB bracket. For purchasing the optional USB bracket, please contact the local dealer.
Pin No. Denition
1 Power (5V)
2 Power (5V)
3 USB DX-
4 USB DY-
5 USB DX+
6 USB DY+
7 GND
8 GND
9 No Pin
10 NC
•Do not plug the IEEE 1394 bracket (2x5-pin) cable into the USB header.
•Prior to installing the USB bracket, be sure to turn off your computer and unplug the power
cord from the power outlet to prevent damage to the USB bracket.
10
9
2
1
11) SPDIF_O (S/PDIF Out Header)
This header supports digital S/PDIF Out and connects a S/PDIF digital audio cable (provided by expan-
sion cards) for digital audio output from your motherboard to certain expansion cards like graphics cards
and sound cards. For example, some graphics cards may require you to use a S/PDIF digital audio cable
for digital audio output from your motherboard to your graphics card if you wish to connect an HDMI
display to the graphics card and have digital audio output from the HDMI display at the same time. For
information about connecting the S/PDIF digital audio cable, carefully read the manual for your expan-
sion card.
Pin No. Denition
1 SPDIFO
2 GND
1

- 19 - Hardware Installation
13) COMB (Serial Port Header)
The COM header can provide one serial port via an optional COM port cable. For purchasing the op-
tional COM port cable, please contact the local dealer.
Pin No. Denition
1 NDCD-
2 NSIN
3 NSOUT
4 NDTR-
5 GND
6 NDSR-
7 NRTS-
8 NCTS-
9 NRI-
10 No Pin
14) CLR_CMOS (Clearing CMOS Jumper)
Use this jumper to clear the CMOS values (e.g. date information and BIOS congurations) and reset
the CMOS values to factory defaults. To clear the CMOS values, place a jumper cap on the two pins to
temporarily short the two pins or use a metal object like a screwdriver to touch the two pins for a few
seconds.
Open: Normal
Short: Clear CMOS Values
•Always turn off your computer and unplug the power cord from the power outlet before clear-
ing the CMOS values.
•After clearing the CMOS values and before turning on your computer, be sure to remove the
jumper cap from the jumper. Failure to do so may cause damage to the motherboard.
•After system restart, go to BIOS Setup to load factory defaults (select Load Optimized
Defaults) or manually congure the BIOS settings (refer to Chapter 2, "BIOS Setup," for BIOS
congurations).
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Hardware Installation - 20 -
15) BAT(Battery)
The battery provides power to keep the values (such as BIOS congurations, date, and time information)
in the CMOS when the computer is turned off. Replace the battery when the battery voltage drops to a
low level, or the CMOS values may not be accurate or may be lost.
You may clear the CMOS values by removing the battery:
1. Turn off your computer and unplug the power cord.
2. Gently remove the battery from the battery holder and wait for one
minute. (Or use a metal object like a screwdriver to touch the positive
and negative terminals of the battery holder, making them short for 5
seconds.)
3. Replace the battery.
4. Plug in the power cord and restart your computer.
•Always turn off your computer and unplug the power cord before replacing the battery.
•Replace the battery with an equivalent one. Danger of explosion if the battery is replaced with
an incorrect model.
•Contact the place of purchase or local dealer if you are not able to replace the battery by your-
self or uncertain about the battery model.
•When installing the battery, note the orientation of the positive side (+) and the negative side (-)
of the battery (the positive side should face up).
•Used batteries must be handled in accordance with local environmental regulations.