ASRock Essential Information in the 990FX Extreme4 Manual

(3-pin PWR_FAN1)

(see p.12 No. 40)

PWR_FAN_SPEED +12V

GND

CPU Fan Connectors

(4-pin CPU_FAN1)

(see p.12 No. 6)

CPU_FAN_SPEED

+12V FAN_SPEED_CONTROL GND

1 2 3 4

Please connect the CPU fan cable to the connector and match the black wire to the ground pin.

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.

Pin 1-3 Connected

3-Pin Fan Installation

(3-pin CPU_FAN2) (see p.12 No. 7)

+12V

GND PWR_FAN_SPEED

ATX Power Connector 12 24

(24-pin ATXPWR1)

(see p.12 No. 12)

1 13

Please connect an ATX power supply to this connector.

Though this motherboard provides 24-pin ATX power connector,	12	24
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.
20-Pin ATX Power Supply Installation	1	13

ATX 12V Power Connector	8	5
(8-pin ATX12V1)
(see p.12 No. 5)	4	1

Please connect an ATX 12V

power supply to this connector.

Though this motherboard provides 8-pin ATX 12V power connector, it can still work if you adopt a traditional 4-pin ATX 12V power supply. To use the 4-pin ATX power

supply, please plug your power supply along with Pin 1 and Pin 5. 8	5
4-Pin ATX 12V Power Supply Installation	1
4

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