Gigabyte GA-Z77X-UP4 TH User Manual page 24

3/4) CPU_FAN/SYS_FAN1/SYS_FAN2/SYS_FAN3/SYS_FAN4 (Fan Headers)
All fan headers on this motherboard are 4-pin. Most fan headers possess a foolproof insertion design.
When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is
the ground wire). The speed control function requires the use of a fan with fan speed control design. For
optimum heat dissipation, it is recommended that a system fan be installed inside the chassis.
• 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.
Hardware Installation
1
CPU_FAN
1
SYS_FAN1
1
SYS_FAN3
1
SYS_FAN2
1
SYS_FAN4
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CPU_FAN:
Pin No. Definition
1 GND
2 +12V /Speed Control
3 Sense
4 Speed Control
SYS_FAN1:
Pin No. Definition
1 GND
2 +12V /PWM
3 FAN I/O
4 NC
SYS_FAN2/3:
Pin No. Definition
1 GND
2 +12V
3 FAN I/O
4 PWM
SYS_FAN4:
Pin No. Definition
1 GND
2 +12V
3 FAN I/O
4 NC