Gigabyte AMD Socket 754 Processor Motherboard GA-K8NS Pro User Manual page 23

5) PWR_FAN (Power Fan Connector)
This connector allows you to link with the cooling fan on the system case to lower the system
temperature.
6) NB_FAN (Chip Fan Connector)
If you installed wrong direction, the chip fan will not work. Sometimes will damage the chip fan.
(Usually black cable is GND)
Pin No.
1
2
1
3
Pin No.
1
2
1
- 23 - Hardware Installation Process
Definition
GND
+12V
NC
Definition
Power
GND