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Chassis and Power Fan Connectors
(4-pin CHA_FAN1)
(see p.2, No. 33)
(3-pin CHA_FAN2)
(see p.2, No. 13)
(3-pin PWR_FAN1)
(see p.2, No. 32)
CPU Fan Connectors
(4-pin CPU_FAN1)
(see p.2, No. 1)
Though this motherboard provides 4-Pin CPU fan (Quiet Fan) support, the 3-Pin
CPU fan still can work successfully even without the fan speed control function.
If you plan to connect the 3-Pin CPU fan to the CPU fan connector on this
motherboard, please connect it to Pin 1-3.
ATX Power Connector
(24-pin ATXPWR1)
(see p.2, No. 5)
Though this motherboard provides 24-pin ATX power connector,
it can still work if you adopt a traditional 20-pin ATX power supply.
To use the 20-pin ATX power supply, please plug your
power supply along with Pin 1 and Pin 13.
26
FAN_SPEED_CONTROL
CHA_FAN_SPEED
+12V
GND
PWR_FAN_SPEED
+12V
GND
4 3 2 1
GND
+12V
CPU_FAN_SPEED
FAN_SPEED_CONTROL
12
24
1
13
20-Pin ATX Power Supply Installation
ASRock P75 Pro3 Motherboard
Please connect the fan cables
to the fan connectors and match
the black wire to the ground pin.
Please connect the CPU fan
cable to the connector and
match the black wire to the
ground pin.
Pin 1-3 Connected
3-Pin Fan Installation
Please connect an ATX power
supply to this connector.
12
1
24
13
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