ASRock IMB-770 manual Onboard Headers and Connectors, CPU Fan Connectors

2.6 Onboard Headers and Connectors

Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over these headers and connectors. Placing jumper caps over the headers and connectors will cause permanent damage of the motherboard!

Chassis Fan Connectors

(4-pin CHA_FAN1)	FAN_SPEED_CONTROL
	CHA_FAN_SPEED
(see p.8, No. 50)	+12V
	GND
(3-pin CHA_FAN2)
(see p.8, No. 51)

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

CPU Fan Connectors	FAN_SPEED_CONTROL
(4-pin CPU_FAN1)	CPU_FAN_SPEED
(see p.8 No. 5)	+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

(3-pin CPU_FAN2)	GND
(see p.8 No. 4)	+12V
	CPU_FAN_SPEED

ATX 12V Power Input Connector

(8-pin ATX12V1)	8	5
(see p.8, No. 3)	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	8	5
4-pin ATX power supply, please plug your power supply along
with Pin 1 and Pin 5.
4-Pin ATX 12V Power Supply Installation	4	1

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