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Hardware Installation
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3/4/5) CPU_FAN / SYS_FAN1 / SYS_FAN2 / SYS_FAN3 / PWR_FAN (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN), a 4-pin (SYS_FAN2) and two 3-pin
(SYS_FAN1/SYS_FAN3) system fan headers, and a 3-pin power fan header (PWR_FAN). 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.
Pin No.
Definition
1
GND
2
+12V
3
Sense
SYS_FAN1/PWR_FAN:
Pin No.
Definition
1
GND
2
+12V / Speed Control
3
Sense
4
Speed Control
CPU_FAN:
Pin No.
Definition
1
GND
2
+12V / Speed Control
3
Sense
4
Reserve
SYS_FAN2:
6) 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.
Pin No.
Definition
1
GND
2
+12V
3
NC
1
CPU_FAN
1
SYS_FAN2
1
SYS_FAN1/
PWR_FAN
SYS_FAN3
1
1
