CHAINTECH 7AIV2 Manual page 19

Chapter 2
Optional LTI-IIT Riser (CN11)
CPU/System Cooling Fan Connectors
G N D
FAN2
+12
CPU Bus Frequency (SW3)
16
FAN1
Rotation
This connector is to be connected to an optional
LCD/TV-out adapter card.
FAN1/FAN2)
(
These added connectors allow the fan to draw
their power from the mainboard instead of the disk
drive connector.
The board's management extension hardware is
able to detect the CPU and system fan speed in
rpm (revolutions per minute). These connectors
supports 3-pin cooling fans with minimum of
3500 RPM. The wiring and plug may vary
depending on the manufacturer. On standard fans,
the red is positive (+12V), the black is ground,
and the yellow wire is the rotation signal.
This switch allows you to select between 100MHz
FSB or 133MHz FSB frequency speed.
SW3 1
100MHz OFF
133MHz OFF
2 3
ON OFF OFF
OFF OFF OFF
4