TYAN TOMCAT I7230W Manual page 57

3.3.4.2 Fan Control Selections
Auto Fan Control
This feature is used to set function of Auto Mode Fan Control.
Disabled / Enabled
J22/J31/J23/J8&J17 Number of Pins Select
These features are used to select 3 or 4 pin fan connector. After the
setting, then you can use the function of "Auto Fan Control".
4 Pin / 3 Pin
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