Gigabyte Gag1975xc Manual

							Hardware Installation - 21 -
English1-9 Connectors Introduction
1) ATX_12V_2X4
2) ATX (Power Connector)
3) PCIE_12V
4) CPU_FAN
5) SYS_FAN
6) PWR_FAN
7) NB_FAN
8) FDD
9) IDE1 / IDE2
10) SATAII0_1 / SATAII2_3
11) PWR_LED
12) BATTERY
13) F_PANEL
14) F_AUDIO
15) CD_IN
16) SPDIF_IO
17) SUR_CEN
18) F_USB1 / F_USB2 / GREEN_USB
19) F1_1394 / F2_1394
20) COMA
21) PW1 / PW2
22) RF_ID
23) C I
162
1
134
19
8
15125 6
9
14
182221 17
20
23
10
37
9
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							GA-G1975X-C Motherboard - 22 -
English
1/2) ATX_12V_2X4 / 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 (2x4) power connector mainly supplies power to the CPU. If the ATX 12V (2x4)
power connector is not connected, the system will not start. If you wish to install a power supply
that provides ATX 12V (2x2) power connector, please connect the ATX 12V power connector to
the Pin 3, 4, 7, 8 of the onboard ATX_12V_2X4 po wer connector according to the pin definitions.
Important   Use of a power supply providing an ATX 12V (2x4) power connector is recommended
by processor manufacturer when using Intel Pentium D Extreme Edition processor.
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
(400W or greater).  If a power supply is used th at does not provide the required power, the result
can lead to an unstable system or a system that is unable to start. If you use  a power supply
that provides a 24-pin ATX or 2x4 pin ATX 12V power connector, please remove the small cover
on the power connector on the motherboard before  plugging in the power cord ; otherwise, please
do not remove it.
Pin No. Definition
1 GND
2 GND
3 GND
4 GND
5 +12V
6 +12V
7 +12V
8 +12V
4 8
1 5
13 1
24 12Pin 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 24-pin  ATX)
24 GND(Only for 24-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 24-pin  ATX)
12  3.3V(Only for 24-pin  ATX) 
						

							Hardware Installation - 23 -
English
4/5/6) CPU_FAN / SYS_FAN / PWR_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 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).
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 1
Pin No. Definition
1 GND
2 +12V
3 Sense
4 Speed Control
(Only for CPU_FAN)
3) PCIE_12V (Power Connector)
The PCIE_12V power connector supplies extra power to the PCIE x 16 slot. Connect this
connector depending on your system requirements.
PIin No. Definition
1NC
2 GND
3 GND
4 +12V
CPU_FAN
SYS_FAN / PWR_FAN
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							GA-G1975X-C Motherboard - 24 -
English
7) NB_FAN (Chip Fan Connector)
If you installed wrong direction, the chip fan will not work. Sometimes will damage the chip fan.
(Usually black cable is GND)
Pin No. Definition
1 +12V
2 GND
1
8) FDD (Floppy 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.
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							Hardware Installation - 25 -
English9) 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).To ensure that an IDE CD-ROM drive can work properly, please attach it to the IDE 1
connector.
1 239 40IDE1
1 2
39 40
IDE2
10) SATAII0_1 / SATAII2_3 (SATA 3Gb/s Connector)
SATA 3Gb/s can provide up to 300MB/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
5RXN
6 RXP
7 GND
1
7
1 7 
						

							GA-G1975X-C Motherboard - 26 -
English
11) PWR_LED
PWR_LED is connect with the system power indicator to indicate whether the system is on/off. It
will blink when the system enters suspend mode.
Pin No. Definition
1 MPD+
2 MPD-
3 MPD-
1
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. Turn OFF the computer and unplug the power cord.
2. Take out the battery gently and put it aside for about 10
minutes (Or you can use a  metal object to connect the
positive and negative pins in the battery holder to make
them short for one minute).
3. Re-install the battery.
4. Plug the power cord and turn ON the computer.
12) BATTERY 
						

							Hardware Installation - 27 -
English13) 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.
HD (IDE Hard Disk Active LED) Pin 1: LED anode(+)
(Blue) Pin 2: LED cathode(-)
SPEAK (Speaker Connector)Pin 1: Power
(Amber)Pin 2- Pin 3: NC
Pin 4: Data(-)
RES (Reset Switch)Open: Normal
(Green)Close: Reset Hardware System
PW (Power Switch)Open: Normal
(Red)Close: Power On/Off
MSG (Message LED/Power/Sleep LED) Pin 1: LED anode(+)
(Yellow) Pin 2: LED cathode(-)
NC ( Purple) NC
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 
						

							GA-G1975X-C Motherboard - 28 -
English
15) CD_IN (CD IN)
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
Pin No. Definition
1 MIC
2 GND
3 MIC_BIAS
4NC
5 FrontAudio(R)
6NC
7NC
8 No Pin
9 FrontAudio(L)
10 NC
14) F_AUDIO (Front Audio Connector)
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 the module and connector will make the audio device unable to work or even
damage it. For optional front panel audio module, please contact your chassis manufacturer.
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							Hardware Installation - 29 -
English16) SPDIF_IO (SPDIF In/Out)
The SPDIF 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 SPDIF 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 SPDIF cable, incorrect connection between the cable and connector will make the
device unable to work or even damage it. For optional SPDIF cable, please contact your local
dealer.
16 2
5
Pin No. Definition
1 Power
2 No Pin
3 SPDIF
4 SPDIFI
5 GND
6 GND
17) SUR_CEN (Surround Center Connector)
Please connect the Surround Kit connector from the included Audio Combo Kit to this connector.
Pin No. Definition
1 REAR_L
2 REAR_R
3 GND
4 No Pin
5 CENTER
6 LEF
7 SIDE_L
8 SIDE_R
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							GA-G1975X-C Motherboard - 30 -
English
Pin No. Definition1 Power(12V)2 Power(12V)3 TPA0+4 TPA0-5 GND6 GND7 TPB0+8 TPB0-9 Power(12V)10 Power(12V)11 TPA1+12 TPA1-13 GND14 No Pin15 TPB1+
16 TPB1-
216
115 F2_1394210
19 F1_1394
Pin No. Definition
1 TPA2+
2 TPA2-
3 GND
4 GND
5 TPB2+
6 TPB2-
7 No Pin
8 Power(12V)
9 Power(12V)
10 GND
19) F1_1394 / F2_1394 (IEEE 1394 Connector)
Serial interface standard set by Institute of Electrical and Electronics Engineers, which has features
like high speed, highbandwidth and hot plug. Be careful with the polarity of the IEEE1394 connector.
Check the pin assignment carefully while you connect the IEEE1394 cable, incorrect connection
between the cable and connector will make the device unable to work or even damage it. For
optional IEEE1394 cable, please contact your local dealer.
18) F_ USB1 / F_USB2 / GREEN_USB (Front USB Connector)
Be careful with the polarity of the front USB connector. Check the pin assignments carefully while
you connect the front USB cable, incorrect connection between the cable and connector will make
the device unable to work or even damage it. For optional front USB cable, please contact your
local dealer. The GREEN_USB connector provides no standby power when system is off and
it does not support USB device to wake up from S3 mode. Users who wish to shut down the
standby power
(note) for their USB devices during system power-off can connect the devices to this
connector via the optional front USB cable.
Pin No. Definition
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
1 2
9 10
(Note)When the standby power is shut down, USB devices
(example: optical mouses) will not light on during
system power-off.