Gigabyte Ga945gcmxs2 User Guide

Hardware Installation - 21 -
English1/2) 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...

GA-945GCM(X)-S2 Motherboard - 22 -
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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(CPU_FAN)
power connector and possesses a foolproof 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).
Remember to connect the CPU/system fan cable to the...

Hardware Installation - 23 -
English6) IDE (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).
Before attaching the IDE cable, please take...

GA-945GCM(X)-S2 Motherboard - 24 -
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8) PWR_LED
The PWR_LED connector is connected with the system power indicator to indicate whether the
system is on/off. It will blink when the system enters suspend mode(S1).
Pin No. Definition
1 MPD+
2 MPD-
3 MPD-1
9) BATTERY
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended
by the manufacturer.
Dispose of used batteries according to the manufacturers
instructions.
If you want to erase CMOS...
1....

Hardware Installation - 25 -
English10) F_PANEL (Front Panel Jumper)
Please connect the power LED, PC speaker, reset switch and power switch etc. of your chassis
front panel to the F_PANEL connector according to the pin assignment below.
MSG (Message LED/Power/Sleep LED) Pin 1: LED anode(+)
Pin 2: LED cathode(-)
PW (Power Switch)Open: Normal
Close: Power On/Off
SPEAK (Speaker Connector)Pin 1: Power
Pin 2- Pin 3: NC
Pin 4: Data(-)
HD (IDE Hard Disk Active LED) Pin 1: LED anode(+)
Pin 2: LED cathode(-)
RES...

GA-945GCM(X)-S2 Motherboard - 26 -
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12) CD_IN (CD IN Connector)
Connect CD-ROM or DVD-ROM audio out to the connector.
Pin No. Definition
1 CD-L
2 GND
3 GND
4 CD-R
1
11) F_AUDIO (Front Audio Connector)
This connector supports either HD (High Definition) or AC97 front panel audio module. If you wish
to use the front audio function, connect the front panel audio module to this connector. Check the pin
assignments carefully while you connect the front panel audio module. Incorrect connection
between...

Hardware Installation - 27 -
English13) SPDIF_IO (S/PDIF In/Out Connector)
The S/PDIF output is capable of providing digital audio to external speakers or compressed AC3
data to an external Dolby Digital Decoder.  Use this feature only when your stereo system has
digital input function. Use S/PDIF IN  feature only when your device has digital output function.
Be careful with the polarity of the SPDIF_IO connector.  Check the pin assignment carefully while
you connect the S/PDIF cable, incorrect...

GA-945GCM(X)-S2 Motherboard - 28 -
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15) COMB (COMB Connector)
Be careful with the polarity of the COMB connector.  Check the pin assignments while you connect
the COMB cable.  Please contact your nearest dealer for optional COMB cable.
Pin No. Definition
1 NDCDB-
2 NSINB
3 NSOUTB
4 NDTRB-
5 GND
6 NDSRB-
7 NRTSB-
8 NCTSB-
9 NRIB-
10 No Pin
109
2 1
Open: Normal
Short: Clear CMOS
16) CLR_CMOS (Clear CMOS)
You may clear the CMOS data to its default values by this header.  To clear CMOS, temporarily...

Hardware Installation - 29 -
English17) CI (Chassis Intrusion, Case Open)
This 2-pin connector allows your system to detect if the chassis cover is removed.  You can
check the Case Opened status in BIOS Setup.
1
Pin No. Definition
1 Signal
2 GND 

GA-945GCM(X)-S2 Motherboard - 30 -
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