SOYO SY-P4I845PE - Manual (Page 30)

Hardware Installation SY-P4I845PE
26
(2) Chassis Cooling Fan (CHAFAN1, CHAFAN2)
Some chassis also feature a cooling fan. This Motherboard features a
CHAFAN connector to provide 12V power to the chassis fan. Connect the
cable from the chassis fan to the CHAFAN 3-pin connector. Install
according to the following pin assignment:
Note: CPU cooling fan must be installed to prevent CPU from
overheating and ensure system stability. Chassis cooling fan is
optional, depending on whether there is cooling fan in your chassis.
SENSOR
GND
12V
12V
GND
NC
1
3
3
1
2
2
Classis Cooling Fan
(CHAFAN1, CHAFAN2)
CHAFAN Pin Assignment
CHAFAN1
CHAFAN2