SOYO SY-7VDA User Manual page 43

BIOS Setup Utility
(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: CPUFAN must be installed for this Motherboard, CHAFAN is
optional.
Chassis Cooling Fan
CHAFAN Pin Assignment
1
GND 12V
3
2
SENSOR
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SY-7VDA