SOYO SY-K8USA DRAGON Ultra User Manual page 38

Hardware Installation
(2) Chassis Cooling Fan (CHAFAN1, CHAFAN2, CHAFAN3)
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 the CPU from
overheating and ensure system stability. Chassis cooling fan is
optional, depending on whether there is cooling fan in your chassis.
Classis Cooling Fan
(CHAFAN1, CHAFAN2, CHAFAN3)
CHAFAN Pin Assignment
CHAFAN1
SENSOR
Ctrl
GND
CHAFAN2
1 2
GND
+12V
CHAFAN3
1 2
GND +12V
33
SY-K8USA DRAGON Ultra
3
2
1
3
NC
3
NC