ASROCK N100M User Manual page 31

Chassis/Water Pump Fan Connectors
(4-pin CHA_FAN1/WP) (see p.6, No. 1)
(4-pin CHA_FAN2/WP) (see p.6, No. 7)
This motherboard provides two 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.
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CHA_FAN1/WP
GND
FAN_VOLTAGE
CHA_FAN_SPEED
FAN_SPEED_CONTROL
1 2 3 4
CHA_FAN2/WP
GND
FAN_VOLTAGE
CHA_FAN_SPEED
FAN_SPEED_CONTROL
1 2 3 4