ASRock A55 Pro manual CPU Fan Connectors, ATX 12V Power Connector

CPU Fan Connectors	FAN_SPEED_CONTROL
(4-pin CPU_FAN1)	CPU_FAN_SPEED
(see p.11 No. 4)	+12V
	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
ATX Power Connector	12	24	Please connect an ATX power
(24-pin ATXPWR1)			supply to this connector.
(see p.11 No. 7)

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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	5	1
(8-pin ATX12V1)
(see p.11 No. 1)	8	4

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 51 4-pin ATX power supply, please plug your power supply along with

Pin 1 and Pin 5.

4-Pin ATX 12V Power Supply Installation 8 4

Serial port Header	This COM1 header supports a
(9-pin COM1)	serial port module.
(see p.11 No.25)

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