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TECHNOLOGY CO., LTD.
GIGABYTE UNITED INC. is designated by GIGA-BYTE TECHNOLOGY CO., LTD as the exclusive global distributor of GIGABYTE branded motherboards.
Disclaimer
Information in this manual is protected by copyright laws and is the property of GIGABYTE.
Changes to the specifications and features in this manual may be made by GIGABYTE without 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 Classifications
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\Motherboard\Technology Guide page on our website.
For product-related information, check on our website at:
http://www.gigabyte.com.tw
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.
GA-M68SM-S2L motherboard
Motherboard driver disk
User's Manual
Quick Installation Guide
One IDE cable
Two SAT A 3Gb/s cables
I/O Shield
The box contents above are for reference only and the actual items shall depend on product package you obtain.
The box contents are subject to change without notice.
Optional Items
2-port USB 2.0 bracket (Part No. 12CR1-1UB030-51R)
2-port SATA power cable (Part No. 12CF1-2SERPW -01R)
COM port cable (Part No. 12CF1-1CM001-32R)
S/PDIF out cable (Part No. 12CR1-1SPOUT-02R)
- 6 -
GA-M68SM-S2L Motherboard Layout
KB_MS
DVI
VGA
USB
AUDIO
CODEC
LPT
USB
F_AUDIO
RTL
8211BL
ATX_12V
LAN
CD_IN
SPDIF_O
PCIE_16
PCIE_1
PCI1
PCI2
CPU_FAN
IT8716
COM
GA-M68SM-S2L
CI
BIOS
SYS_FAN
Socket AM2
BATTERY
PWR_LED
F_PANEL
®
nVIDIA
GeForce 7025/
nForce 630a
DDRII_2
DDRII_1
SATAII1
SATAII2
SATAII0
IDE
F_USB2
F_USB1
F_USB3
CLR_CMOS
ATX
FDD
SATAII3
- 7 -
Block Diagram
PCIe CLK
(100 MHz)
PCI Express x16
PCI Express Bus
PCIe CLK
(100 MHz)
1 PCI Express x1
PCI Bus
x1
AMD
Socket AM2
CPU
nVIDIA
GeForce 7025/
nForce 630a
CODEC
Hyper Transport
8211BL
®
LPC BUS
CPU CLK+/-(200 MHz)
DDR2 800/667/533 MHz DIMM
Dual Channel Memory
DVI-D
D-Sub
LAN
RTL
RJ45
4 SATA 3Gb/s
ATA-133/100/66/33
IDE Channel
BIOS
Floppy
LPT Port
IT8716
COM Port
PCI CLK
(33 MHz)
2 PCI
10 USB
Ports
SPDIF Out
Line-In (Rear Speaker Out)
Line-Out (Front Speaker Out)
MIC (Center/Subwoofer Speaker Out)
- 8 -
PS/2 KB/Mouse
Chapter 1Hardware Installation
1-1Installation 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
components such as a motherboard, CPU or memory. If you do not have an ESD wrist strap,
keep your hands dry and first 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 supply
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 hardware
components are connected.
•T o 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 system
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 certified computer technician.
(Go to GIGABYTE's website for the latest CPU support list.)
Hyper Transport Bus 2000 MT/s
Chipset nVIDIA® GeForce 7025/nForce 630a chipset
Memory 2 x 1.8V DDR2 DIMM sockets supporting up to 8 GB of system memory
Dual channel memory architecture
Support for DDR2 800/667/533 MHz memory modules
(Go to GIGABYTE's website for the latest memory support list.)
Audio Realtek AL662 codec
High Definition Audio
2/4/5.1-channel
Support for S/PDIF Out
Support for CD In
-1 x IDE connector supporting ATA-133/100/66/33 and up to 2 IDE devices
-4 x SATA 3Gb/s connectors supporting up to 4 SATA 3Gb/s devices
-Support for SATA RAID 0, RAID 1, RAID 0+1 , RAID 5 and JBOD
iTE IT8716 chip:
-1 x floppy disk drive connector supporting up to 1 floppy disk drive
USB Integrated in the nVIDIA® GeForce 7025/nForce 630a chipset
Up to 10 USB 2.0/1.1 ports (4 on the back panel, 6 via the USB brackets
connected to the internal USB headers)
Internal Connectors 1 x 24-pin ATX main power connector
1 x 4-pin ATX 12V power connector
1 x floppy disk drive connector
1 x IDE connector
4 x SATA 3Gb/s connectors
1 x CPU fan header
1 x system fan header
1 x front panel header
1 x front panel audio header
1 x CD In connector
1 x S/PDIF Out header
3 x USB 2.0/1.1 headers
1 x serial port header
1 x chassis intrusion header
1 x power LED header
(Note 1)
GA-M68SM-S2L Motherboard- 10 -
Back Panel 1 x PS/2 keyboard port
Connectors 1 x PS/2 mouse port
1 x parallel port
1 x DVI-D port
1 x D-Sub port
4 x USB 2.0/1.1 ports
1 x RJ-45 port
3 x audio jacks (Line In/Line Out/Microphone)
I/O Controller iTE IT8716 chip
Hardware Monitor System voltage detection
CPU/System temperature detection
CPU/System fan speed detection
CPU/System overheating warning
CPU/System fan fail warning
CPU fan speed control
(Note 2)
BIOS 1 x 4 Mbit flash
Use of licensed AWARD BIOS
PnP 1.0a, DMI 2.0, SM BIOS 2.4, ACPI 1.0b
Unique Features Support for @BIOS
Support for Download Center
Support for Q-Flash
Support for EasyTune
(Note 3)
Support for Xpress Install
Support for Xpress Recovery2
Support for Virtual Dual BIOS
Bundled Software Norton Internet Security (OEM version)
Operating System Support for Microsoft® Windows® Vista/XP/2000
Form Factor Micro ATX form factor; 24.4cm x 22.5cm
(Note 1) Due to Windows Vista/XP 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 you install.
(Note 3) Available functions in EasyTune may differ by motherboard model.
Hardware Installation- 11 -
1-3Installing 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.
• 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
damage of the CPU may occur.
• Set the CPU host frequency in accordance with the CPU specifications. It is not recommended that the system bus frequency be set beyond hardware specifications since it
does not meet the standard requirements for the peripherals. If you wish to set the frequency beyond the standard specifications, please do so according to your hardware
specifications including the CPU, graphics card, memory, hard drive, etc.
1-3-1 Installing the CPU
A. Locate the pin one (denoted by a small triangle) of the CPU socket and the CPU.
A Small Triangle Mark
Denotes Pin One of the
Socket
A Small Triangle Marking
Denotes CPU Pin One
GA-M68SM-S2L Motherboard- 12 -
AM2 CPU Socket
AM2 CPU
B. Follow the steps below to correctly install the CPU into the motherboard CPU socket.
Before installing the CPU, make sure to turn off the computer and unplug the power
cord from the power outlet to prevent damage to the CPU.
CPU Socket Locking
Lever
Step 1:
Completely lift up the CPU socket locking lever.
Step 2:
Align the CPU pin one (small triangle marking)
with the triangle mark on the CPU socket and
gently insert the CPU into the socket. Make
sure that the CPU pins fit perfectly into their
holes. Once the CPU is positioned into its
socket, place one finger down on the middle of
the CPU, lowering the locking lever and latching it into the fully locked position.
Do not force the CPU into the CPU socket. The CPU cannot fit in if oriented incorrectly. Adjust
the CPU orientation if this occurs.
Hardware Installation- 13 -
1-3-2 Installing the CPU Cooler
Follow the steps below to correctly install the CPU cooler on the CPU. (The following procedure uses
the GIGABYTE cooler as the example.)
Step 1:
Apply an even and thin layer of thermal grease
on the surface of the installed CPU.
Step 3:
Hook the CPU cooler clip to the mounting lug on
one side of the retention frame. On the other side,
push straight down on the the CPU cooler clip to
hook it to the mounting lug on the retention frame.
Step 5:
Finally, attach the power connector of the CPU
cooler to the CPU fan header (CPU_FAN) on
the motherboard.
Step 2:
Place the CPU cooler on the CPU.
Step 4:
Turn the cam handle from the left side to the
right side (as the picture above shows) to lock
into place. (Refer to your CPU cooler installation manual for instructions on installing the
cooler.)
Use extreme care when removing the CPU cooler because the thermal grease/tape between
the CPU cooler and CPU may adhere to the CPU. Inadequately removing the CPU cooler
may damage the CPU.
GA-M68SM-S2L Motherboard- 14 -
1-4Installing 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 memory support list.)
• 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
direction. If you are unable to insert the memory, switch the direction.
1-4-1 Dual Channel Memory Configuration
This motherboard provides two DDR2 memory sockets and supports Dual Channel
Technology. After the memory is installed, the BIOS will automatically detect the
specifications and capacity of the memory. Enabling Dual Channel memory mode
will double the original memory bandwidth.
The two DDR2 memory sockets are divided into two channels and each channel has two memory
sockets as following:
Channel 0: DDRII_1
Channel 1: DDRII_2
DDRII_2
DDRII_1
Due to CPU limitation, read the following guidelines before installing the memory in Dual Channel mode.
1. Dual Channel mode cannot be enabled if only one 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.
Hardware Installation- 15 -
1-4-2 Installing a Memory
Before installing a memory module , make sure to turn off the computer and unplug
the power cord from the power outlet to prevent damage to the memory module.
DDR2 DIMMs are not compatible to DDR DIMMs. Be sure to install DDR2 DIMMs on
this motherboard.
Notch
DDR2 DIMM
A DDR2 memory module has a notch, so it can only fit in one direction. Follow the steps below to
correctly install your memory modules in the memory sockets.
Step 1:
Note the orientation of the memory module. Spread the retaining
clips at both ends of the memory socket. Place the memory
module on the socket. As indicated in the picture on the left,
place your fingers on the top edge of the memory, push down
on the memory and insert it vertically into the memory socket.
Step 2:
The clips at both ends of the socket will snap into place when
the memory module is securely inserted.
GA-M68SM-S2L Motherboard- 16 -
1-5Installing 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.
PCI Express x16 Slot
PCI Express x1 Slot
PCI Slot
Follow the steps below to correctly install your expansion card in the expansion slot.
1. Locate an expansion slot that supports your card. Remove the metal slot cover from the chassis back panel.
2. Align the card with the slot, and press down on the card until it is fully seated in the slot.
3. Make sure the metal contacts on the card are completely inserted into the slot.
4. Secure the card's metal bracket to the chassis back panel with a screw.
5. After installing all expansion cards, replace the chassis cover(s).
6. Turn on your computer. If necessary, go to BIOS Setup to make any required BIOS changes for
your expansion card(s).
7. Install the driver provided with the expansion card in your operating system.
Example: Installing and Removing a PCI Express x16 Graphics Card:
• Installing a Graphics Card:
Gently push down on the top edge of the card
until it is fully inserted into the PCI Express x16
slot. Make sure the card is securely seated in
the slot and does not rock.
• Removing the Card:
Gently push back on the lever on the slot and then lift the card straight out
from the slot.
Hardware Installation- 17 -
1-6Back Panel Connectors
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.
DVI Port
The DVI-D port supports DVI-D specifictation. Connect a monitor that supports DVI-D connection to
this port.
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.
• This motherboard provides two ports for video output, DVI and D-Sub, and supports dual
view function.
• Due to an nVIDIA GeForce 7025/nForce 630a chipset limitation, the GA-M68SM-S2L
does not support dual view function via the graphics card installed in the PCI Express
x16 or PCI slot.
USB Port
The USB port supports the USB 2.0/1.1 specification. Use this port for USB devices such as an
USB keyboard/mouse, USB printer, USB flash drive and etc.
RJ-45 LAN Port
The Gigabit Ethernet LAN port provides Internet connection at up to 1 Gbps data rate. The following
describes the states of the LAN port LEDs.
Connection/
Speed LED
GA-M68SM-S2L Motherboard- 18 -
LAN Port
Activity LED
Connection/Speed LED:
StateDescription
Orange 1 Gpbs data rate
Green100 Mpbs data rate
Off10 Mpbs data rate
Activity LED:
StateDescription
Blinking Data transmission or receiving is occurring
OffNo data transmission or receiving is occurring
• When removing the cable connected to a back panel connector, first 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.
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 (Front Speaker Out, 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 configuration.
Mic In Jack (Pink)
The default Mic in jack. Microphones must be connected to this jack.
Refer to the instructions on setting up a 2/4/5.1-channel audio configuration in Chapter 5,
"Configuring 2/4/5.1-Channel Audio."
Hardware Installation- 19 -
1-7Internal Connectors
1
3
2
11
16
9
12
13
1)ATX_12V
2)ATX (Power Connector)
3)CPU_FAN
4)SYS_FAN
5)FDD
6)IDE
7)SATAII0 / 1 / 2 / 3
8)PWR_LED
8
15
10
4
10)F_PANEL
11)F_AUDIO
12)CD_IN
13)SPDIF_O
14)F_USB1 / F_USB2 / F_USB3
15)COM
16)CI
17)CLR_CMOS
5
6
7
14
17
9)BATTERY
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.
GA-M68SM-S2L Motherboard- 20 -
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
components on the motherboard. Before connecting the power connector, first 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 connector 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 (400W 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.
• The main power connector is compatible with power supplies with 2x10 power
connectors. When using a 2x12 power supply, remove the protective cover from the
main power connector on the motherboard. Do not insert the power supply cable into pins
under the protective cover when using a 2x10 power supply.
ATX_12V:
Pin No.Definition
2
4
1
3
ATX_12V
1GND
2GND
3+12V
4+12V
ATX:
13
24
1
12
ATX
Pin No.Definition
13.3V
23.3V
3GND
4+5V
5GND
6+5V
7GND
8Power Good
95V SB(stand by +5V)
10+12V
11+12V (Only for 2x12-pin A TX)
12 3.3V (Only for 2x12-pin ATX)
The motherboard has a 4-pin CPU fan header (CPU_FAN) and a 3-pin system fan header
(SYS_FAN). Each fan header supplies a +12V power voltage and possesses a foolproof insertion
design. When connecting a fan cable, be sure to connect it in the correct orientation. Most fans are
designed with color-coded power connector wires. A red power connector wire indicates a
positive connection and requires a +12V voltage. 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.
1
CPU_FAN
1
SYS_FAN
• Be sure to connect fan cables to the fan headers to prevent your CPU and system from
overheating. Overheating may result in damage to the CPU or the system may hang.
• These fan headers are not configuration jumper blocks. Do not place a jumper cap on the
headers.
CPU_FAN:
Pin No.Definition
1GND
2+12V
3Sense
4Speed Control
SYS_FAN:
Pin No.Definition
1GND
2+12V
3Sense
5) FDD (Floppy Disk Drive Connector)
This connector is used to connect a floppy disk drive. The types of floppy disk drives supported
are: 360 KB, 720 KB, 1.2 MB, 1.44 MB, and 2.88 MB. Before connecting a floppy disk drive, be
sure to locate pin 1 of the connector and the floppy disk drive cable. The pin 1 of the cable is
typically designated by a stripe of different color.
3334
12
GA-M68SM-S2L Motherboard- 22 -
6) IDE (IDE Connector)
The IDE connector supports up to two IDE devices such as hard drives and optical drives. Before
attaching 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 configuring master/slave settings for the IDE
devices, read the instructions from the device manufacturers.)
40
39
12
7) SA TAII0/1/2/3 (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. The nVIDIA® GeForce 7025/
nForce 630a controller supports RAID 0, RAID 1, RAID 0+1, RAID 5 and JBOD. Refer to Chapter
5, "Configuring SATA Hard Drive(s)," for instructions on configuring a RAID array.
17
Pin No.Definition
1GND
2TXP
3TXN
4GND
5RXN
6RXP
7GND
Please connect the L-shaped end
of the SATA 3Gb/s cable to your
SATA hard drive.
• A RAID 0 or RAID 1 configuration requires at least two hard drives. If more than two hard
drives are to be used, the total number of hard drives must be an even number.
• A RAID 5 configuration requires at least three hard drives. (The total number of hard
drives does not have to be an even number.)
• A RAID 0+1 configuration requires at least four hard drives and the total number of hard
drives must be an even number.
Hardware Installation- 23 -
8) PWR_LED (System Power LED Header)
This header can be used to connect a system power LED on the chassis to indicate system power
status. The LED is on when the system is operating. The LED keeps blinking when the system is
in S1 sleep state. The LED is off when the system is in S3/S4 sleep state or powered off (S5).
Pin No.Definition
1MPD+
1
2MPD3MPD-
System Status LED
S0On
S1Blinking
S3/S4/S5Off
9) BATTERY
The battery provides power to keep the values (such as BIOS configurations, 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
yourself 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.
GA-M68SM-S2L Motherboard- 24 -
10) 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 connecting the cables.
Message/Power/
Sleep LED
2
1
MSG+
HD+
MSG-
HD-
Power
Switch
PW+
RES-
PW-
RES+
NC
Speaker
Connector
SPEAK+
SPEAK-
20
19
IDE Hard Disk
Active LED
Reset
Switch
• MSG (Message/Power/Sleep LED):
System Status LE D
S0On
S1Blinking
S3/S4/S5Off
Connects to the power status indicator o n the chassis front panel. The
LED is on when the system is operating. The LED keeps blinking when
the system is in S1 sleep state. The LED is off when the system is in
S3/S4 sleep state or powered off (S5).
• PW (Power Switch):
Connects to the power switch on the chassis front panel. You may configure 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 issuing 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. Refer to Chapter 5, "Troubleshooting," for information about beep codes.
• HD (IDE 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.
• NC:
No connection
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 assignments are matched correctly.
Hardware Installation- 25 -
11) F_AUDIO (Front Panel Audio Header)
The front panel audio header supports Intel High Definition 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 connector 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.
• The front panel audio header supports HD audio by default. If your chassis provides an
AC'97 front panel audio module, refer to the instructions on how to activate AC'97 functioninality
via the audio software in Chapter 5, "Configuring 2/4/5.1-Channel Audio."
• Audio signals will be present on both of the front and back panel audio connections
simultaneously. If you want to mute the back panel audio (only supported when using an HD
front panel audio module), refer to Chapter 5, "Configuring 2/4/5.1-Channel Audio."
• 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.
For AC'97 Front Panel Audio:
Pin No.Definition
1MIC
2GND
3MIC Power
4NC
5Line Out (R)
6NC
7NC
8No Pin
9Line Out (L)
10NC
12) CD_IN (CD In Connector, Black)
You may connect the audio cable that came with your optical drive to the header.
Pin No.Definition
1
GA-M68SM-S2L Motherboard- 26 -
1CD-L
2GND
3GND
4CD-R
13) SPDIF_O (S/PDIF Out Header)
This header supports digital S/PDIF out. Via an optional S/PDIF out cable, this header can connect
to an audio device that supports digital audio in. For purchasing the optional S/PDIF out cable,
please contact the local dealer.
Pin No.Definition
1Power
1
2SPDIFO
3GND
Pin 1 (the red wire) of the S/PDIF out cable must align with pin 1 of the SPDIF_O header.
Incorrect connection may render the device unusable or even result in damage to the
device.
14) F_USB1/F_USB2/F_USB3 (USB Headers, Yellow)
The headers conform to USB 2.0/1.1 specification. 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.Definition
1Power (5V)
2Power (5V)
3USB DX-
19
210
4USB DY 5USB DX+
6USB DY+
7GND
8GND
9No Pin
10NC
• 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.
Hardware Installation- 27 -
15) COM (Serial Port Header)
The COM header can provide one serial port via an optional COM port cable. For purchasing the
optional COM port cable, please contact the local dealer.
This motherboard provides a chassis detection feature that detects if the chassis cover has been
removed. This function requires a chassis with chassis intrusion detection design.
1
GA-M68SM-S2L Motherboard- 28 -
Pin No.Definition
1Signal
2GND
17) CLR_CMOS (Clearing CMOS Jumper)
Use this jumper to clear the CMOS values (e.g. date information and BIOS configurations) 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
clearing 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 configure the BIOS settings (refer to Chapter 2, "BIOS Setup," for
BIOS configurations).
Hardware Installation- 29 -
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