ASRock Fatal1ty 990FX Professional manual Chassis Speaker Header

Chassis Speaker Header	1
(4-pin SPEAKER 1)		SPEAKER
		DUMMY
(see p.14 No. 16)	+5V DUMMY

Please connect the chassis speaker to this header.

Power LED Header	Please connect the chassis
(3-pin PLED1)	power LED to this header to
(see p.14 No. 29)	indicate system power status.
	The LED is on when the system
	is operating. The LED keeps
	blinking in S1 state. The LED is
	off in S3/S4 state or S5 state
	(power off).

Chassis and Power Fan Connectors

(4-pin CHA_FAN1)

(see p.14	No. 20)	GND
		+12V
		CHA_FAN_SPEED
		FAN_SPEED_CONTROL
		GND
(3-pin CHA_FAN2)		+12V
		CHA_FAN_SPEED
(see p.14	No. 6)
		GND
(3-pin CHA_FAN3)		+12V
		CHA_FAN_SPEED
(see p.14	No. 24)
		+12V
(3-pin PWR_FAN1)		GND PWR_FAN_SPEED
(see p.14	No. 10)

Please connect the fan cables to the fan connectors and match the black wire to the ground pin. CHA_FAN1/2/3 fan speed can be controlled through UEFI or AXTU.

CPU Fan Connectors

(4-pin CPU_FAN1)

(see p.14 No. 4)

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)	+12V
(see p.14 No. 5)	GND CPU_FAN_SPEED

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