ASRock B75 Pro3-M manual Chassis Speaker Header Please connect the chassis, Speaker to this header

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

The front panel design may differ by chassis. A front panel module mainly consists of power switch, reset switch, power LED, hard drive activity LED, speaker and etc. When connecting your chassis front panel module to this header, make sure the wire assignments and the pin assign-ments are matched correctly.

Chassis Speaker Header	Please connect the chassis
(4-pin SPEAKER 1)	speaker to this header.
(see p.2, No. 19)
Chassis and Power Fan Connectors	Please connect the fan cables
(4-pin CHA_FAN1)	to the fan connectors and match
(see p.2, No. 18)	the black wire to the ground pin.
	CHA_FAN1 supports Fan
(3-pin PWR_FAN1)	Control.
(see p.2, No. 1)
CPU Fan Connectors	Please connect the CPU fan
(4-pin CPU_FAN1)	cable to the connector and
(see p.2, No. 4)	match the black wire to the
	ground pin.

(3-pin CPU_FAN2)

(see p.2, No. 5)

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ASRock B75 Pro3-M Motherboard