Gigabyte Ga945gcms2l User Guide

							Hardware Installation - 21 -
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) SATAII0 / 1 / 2 / 3
8) PWR_LED
9) BAT
10) F_PANEL
11) F_AUDIO
12) CD_IN
13) SPDIF_O
14) F_USB1 / F_USB2
15) CLR_CMOS
16) C I
2
10
5147
3
6
8
16
1
413
9
11
12
15 
						

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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 :
ATX :Pin No. Definition
1 GND
2 GND
3 +12V
4 +12V
Pin No. Definition
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. 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 +12V (Only for 2x12-pin ATX)
12  3.3V (Only for 2x12-pin ATX)
ATX_12V4
2 3
1
13 124 12
ATX 
						

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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.
•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.
3/4) CPU_FAN/SYS_FAN (Fan Headers)
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.
Pin No. Definition
1 GND
2 +12V
3 Sense
4 Speed Control
CPU_FAN :
Pin No. Definition
1 GND
2 +12V
3 Sense
SYS_FAN :
1 1
CPU_FAN
SYS_FAN
1
2 33
34 
						

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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.)
7) SATAII0/1/2/3 (SATA 3Gb/s Connectors, Controlled by ICH7)
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. Definition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
1 239 40
SATAII0SATAII1
SATAII2SATAII31 7
1 7
1 7
1 7 
						

							Hardware Installation - 25 -
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
1 MPD+
2 MPD-
3 MPD-
System Status LED
S0 On
S1 Blinking
S3/S4/S5 Off
9) BAT(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.
•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.
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.
1 
						

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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.
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 assign-
ments and the pin assignments are matched correctly. •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
System Status LED
S0 On
S1 Blinking
S3/S4/S5 Off
•MSG (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 system is in S1 sleep state. The LED is off when the system is in
S3/S4 sleep state or powered off (S5).
1 219
20
HD-
HD+RES+
RES- NC
SPEAK-
MSG-
MSG+PW-
PW+
SPEAK+
Message LED/
Power/
Sleep LED
Power Switch
Speaker Connector
IDE Hard Disk
Active LED
Reset Switch 
						

							Hardware Installation - 27 -
12) CD_IN (CD In Connector)
You may connect the audio cable that came with your optical drive to the header.
Pin No. Definition
1 CD-L
2 GND
3 GND
4 CD-R
1
11) F_AUDIO  (Front Panel Audio Header)
The front panel audio header supports Intel High Definition audio (HD) and AC97 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.
For  AC97 Front Panel Audio: For HD  Front Panel Audio:
•The front panel audio header supports HD audio by default. If your chassis provides an
AC97 front panel audio module, refer to the instructions on how to activate AC97 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.
Pin No. Definition
1 MIC
2 GND
3 MIC Power
4NC
5 Line Out (R)
6NC
7NC
8 No Pin
9 Line Out (L)
10 NC
1 2
9 10
Pin No. Definition
1 MIC2_L
2 GND
3 MIC2_R
4 -ACZ_DET
5 LINE2_R
6 FAUDIO_JD
7 GND
8 No Pin
9 LINE2_L
10 FAUDIO_JD 
						

							GA-945GCM-S2L/S2C Motherboard - 28 -
Pin No. Definition
1 Power (5V)
2 Power (5V)
3 USB DX-
4USB 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.
14) F_USB1/F_USB2 (USB Headers)
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.
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.
1
9
2 101
Pin No. Definition
1 Power
2 SPDIFO
3 GND
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. 
						

							Hardware Installation - 29 -
Open: Normal
Short: Clear CMOS Values
15) 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.
•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).
16) CI (Chassis Intrusion Header)
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.
Pin No. Definition
1 Signal
2 GND
1 
						

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