ASRock FM2A75M-DGS R2.0 manual Please connect the fan cables

Chassis and Power Fan Connectors			Please connect the fan cables
(4-pin CHA_FAN1)			to the fan connectors and
(see p.2 No. 7)			match the black wire to the
			ground pin. CHA_FAN1 fan
(3-pin PWR_FAN1)			speed can be controlled through
(see p.2 No. 29)			UEFI or AXTU.
CPU Fan Connectors			Please connect the CPU fan
(4-pin CPU_FAN1)			cable to the connector and
(see p.2 No. 5)			match the black wire to the
1	2	3	ground pin.
			4

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	24	13	Please connect an ATX power
(24-pin ATXPWR1)			supply to this connector.
(see p.2 No. 2)	12	1

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.

24	13
20-Pin ATX Power Supply Installation
12	1
ATX 12V Power Connector	Please connect an ATX 12V
(4-pin ATX12V1)	power supply to this connector.
(see p.2, No. 1)
Serial port Header	This COM1 header supports a
(9-pin COM1)	serial port module.
(see p.2 No.22)

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ASRock FM2A75M-DGS R2.0 Motherboard