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3/4/5/6/7) CPU_FAN1/SYS_FAN1/SYS_FAN2/SYS_FAN3/SYS_FAN4
(CPU Fan/System Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN1), four 4-pin (SYS_FAN1/SYS_FAN2/SYS_
FAN3) system fan headers. 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 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.
SYS_FAN4
SYS_FAN2
SYS_FAN1
• 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.
8) PWR_DET1 (PMBus connector)
Hardware Installation
CPU_FAN1
SYS_FAN3
- 22 -
1
1
Pin No. Definition
1
GND
2
+12V
3
Sense
4
Speed Control
1
Pin No. Definition
1
SMB CLK
2
SMB DATA
3
SMB Alert
5
4
GND
5
3.3V Sense
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