SOYO SY-6IWM - Manual (Page 43)

Hardware Installation SY-6IWM
39
(2) Chassis Cooling Fan
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.
Chassis Cooling Fan
CHAFAN Pin Assignment
SENSOR 12V GND
1 3 2