Gigabyte GA-X79-UD3 User Manual page 24

3/4) CPU_FAN/SYS_FAN1/SYS_FAN2/SYS_FAN3/SYS_FAN4 (Fan Headers)
The motherboard has a 4-pin CPU fan header (CPU_FAN), two 4-pin (SYS_FAN1/SYS_FAN2) and two
3-pin (SYS_FAN3/SYS_FAN4) system fan headers. Most fan headers possess a foolproof insertion de-
sign. 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 fan speed control, which requires the use of a cooler
with fan speed control design. For optimum heat dissipation, it is recommended that a system fan be in-
stalled inside the chassis.
Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheating. Over-
•
heating 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
CPU_FAN:
Pin No. Definition
1
1
2
CPU_FAN
3
4
SYS_FAN1:
Pin No. Definition
1
1
2
SYS_FAN1
3
4
SYS_FAN2:
Pin No. Definition
1
2
1
3
SYS_FAN2
4
SYS_FAN3/SYS_FAN4:
Pin No. Definition
1
1
2
SYS_FAN3/SYS_FAN4
3
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GND
+12V/Speed Control
Sense
Speed Control
GND
+12V /Speed Control
Sense
Reserve
GND
+12V
Sense
Speed Control
GND
+12V
Sense