ASROCK AD2550R/U3S3 User Manual download pdf (Page 29)

ATX Power Connector

(24-pin ATXPWR1)

(see p.10,12,14)

CPU Fan Connectors

(4-pin CPU_FAN1)

(see p.10,12,14)

Though this motherboard provides a 4-Pin CPU fan (Quiet Fan)

connector, 3-Pin CPU fans can still work successfully even with-

out the fan speed control function. If you plan to connect a 3-Pin

CPU fan to the CPU fan connector on this motherboard, please

connect it to Pin 1-3.

3-Pin Fan Installation

Pin 1-3 Connected

(3-pin CPU_FAN2)

(see p.10,12,14)

Please connect the CPU fan

cable to the connector and

match the black wire to the

ground pin.

Please connect an ATX pow-

er supply to this connector.

20-Pin ATX Power Supply Installation

Though this motherboard provides a 24-pin ATX pow-

er connector, it can still work if you adopt a traditional

20-pin ATX power supply. To use a 20-pin ATX power

supply, please plug your power supply along Pin 1

and Pin 13.

GND

+12V

CPU_FAN_SPEED

N_SPEED_CONTROL

GND

12V

CPU_FA

N_SPEED

12 24

1 13

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 55 56

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ASROCK AD2550R/U3S3 User Manual Page 29