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System Board
49
Fan (CPU FAN, PWR FAN) Connectors
The CPU Fan connector is a 1 x 3-pin straight header connector that
controls the CPU cooling fan.
The PWR FAN connector is a 2 x 3-pin connector that controls the power
supply cooling fan. It connects to P3 from the power supply.
CPU Fan connector
Pin Signal Name
1GND
2 FAN_CTRL (+12V)
3FAN_SEN
PWR FAN connector
Pin Signal Name
1Ground
2Fan C
*
* Power supply provides 12V to this pin when system is in Power On mode (for fastest fan speed), and 6V
when system is in Suspend mode (to reduce fan noise).
33.3V sense
O
N
12
KY0034.VSD
13
PWR FAN
CPU Fan
1
3
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