Gigabyte GA-MA78GM-S2HP User Manual page 24

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 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.
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 connec-
tion and requires a +12V voltage. The black connector wire is the ground wire.
• 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 configuration jumper blocks. Do not place a jumper cap on the
headers.
GA-MA78GM-DS2H/S2HP/S2H Motherboard
1
CPU_FAN
1
SYS_FAN
1
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CPU_FAN:
Pin No. Definition
1 GND
2 +12V / Speed Control
3 Sense
4 Speed Control
SYS_FAN:
Pin No. Definition
1 GND
2 Speed Control
3 Sense
4 +5V
Pin No. Definition
1 GND
2 +12V
3 NC