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- 29 - 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.
DEBUG
PORT
G.QBOFM
1
6) SYS_FAN4_PUMP (System Fan/Water Cooling Pump Header)
The fan/pump 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. For optimum heat dissipation, it is recommended that a system fan be installed
inside the chassis. The header also provides speed control for a water cooling pump, refer to Chapter 2,
"BIOS Setup," "M.I.T.," for more information
DEBUG
PORT
G.QBOFM
1
Pin No. Definition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control
Pin No. Definition
1 GND
2 Voltage Speed Control
3 Sense
4 PWM Speed Control