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Hardware Installation
7) CPU_OPT (Water Cooling CPU Fan Header)
The fan header is 4-pin and possesses a foolproof insertion design. 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.
Pin No. 
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
G.QBOFM
1
Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheat-
ing. Overheating may result in damage to the CPU or the system may hang.

G.QBOFM
1
6) SYS_FAN5_PUMP/SYS_FAN6_PUMP (System Fan/Water Cooling Pump Headers)
The fan/pump headers 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 dis-
sipation, it is recommended that a system fan be installed inside the chassis. The headers also provides
speed control for a water cooling pump, refer to Chapter 2, "BIOS Setup," "M.I.T.," for more information.
Pin No. 
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
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