User`s manual

Chapter 2: Installation
2-17
Fan Header
PinDenitions
Pin# Denition
1 Ground
2 +12V
3 Tachometer
4 PWM_Control
Fan Headers
The X9SCV-Q has three fan headers
(Fan1~Fan3). These fans are 4-pin fan
headers. However, Pins 1~3 of the fan
headers are backward compatible with
the traditional 3-pin fans. (Note: Please
use all 3-pin fans or all 4-pin fans on a
motherboard. Please do not use 3-pin
fans and 4-pin fans on the same board.
Refer to the table on the right for pin
denitions.
Note: The speeds of 4-pin (PWM)
fans are controlled by Thermal
Management via BIOS Hardware
Monitoring in the Advanced Setting.
(The default setting is Disabled.)
A
B
Fan2
Fan3
Fan1
A
B
C
C