ASROCK PRO Series User Manual page 43

Chassis/Water Pump Fan Connectors
(4-pin CHA_FAN1/WP) (see p.6, No.23)
(4-pin CHA_FAN2/WP) (see p.6, No. 18)
(4-pin CHA_FAN3/WP) (see p.6, No. 14)
This motherboard provides three 4-Pin water cooling chassis fan connectors. If
you plan to connect a 3-Pin chassis water cooler fan, please connect it to Pin 1-3.
CHA_FAN2/WP
GND
1
40
FAN_VOLTAGE
CHA_FAN_SPEED
FAN_SPEED_CONTROL
2 3 4
CHA_FAN1/WP
FAN_SPEED_CONTROL
CHA_FAN_SPEED
FAN_VOLTAGE
GND
CHA_FAN3/WP
GND
FAN_VOLTAGE
CHA_FAN_SPEED
FAN_SPEED_CONTROL
1 2 3 4
4
3
2
1