Gigabyte GA-MA785GPM-UD2H (rev.1.0) [25/104] 4 cpu_fan sys_fan fan headers

Gigabyte GA-MA785GPM-UD2H (rev.1.0) [25/104] 4 cpu_fan sys_fan fan headers
- 25 - Hardware Installation
3/4) CPU_FAN/SYS_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN)and a 4-pin system fan header(SYS_FAN).
Each fan header supplies a +12V power voltage and possesses a foolproof insertion design. When con-
necting 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 dissipa-
tion, it is recommended that a system fan be installed inside the chassis.
CPU_FAN:
Pin No. Denition
1 GND
2 +12V / Speed Control
3 Sense
4 Speed Control
SYS_FAN:
Pin No. Denition
1 GND
2 +12V / Speed Control
3 Sense
4 Reserve
Pin No. Denition
1 GND
2 +12V
3 NC
Be sure to connect fan cables to the fan headers to prevent your CPU, North Bridge and
system from overheating. Overheating may result in damage to the CPU/North Bridge 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
SYS_FAN
1
1
5) NB_FAN (North Bridge Fan Header)
Connect the North Bridge fan cable to this header. The fan header has 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.
1

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