ASROCK H55M/USB3 R2.0 User Manual download pdf (Page 22)

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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.

3-Pin Fan Installation

Pin 1-3 Connected

CPU Fan Connector Please connect a CPU fan cable

(4-pin CPU_FAN1) to this connector and match

(see p.11 No. 3) the black wire to the ground pin.

1 2 3 4

Chassis and Power Fan Connectors Please connect the fan cables

(4-pin CHA_FAN1) to the fan connectors and

(see p.11 No. 22) match the black wire to the

ground pin.

(3-pin PWR_FAN1)

(see p.11 No. 4)

GND

+12V

CHA_FAN_SPEED

FAN_SPEED_CONTROL

PWR_FAN_SPEED

GND

+12V

GND

PWRBTN#

PLED-

PLED+

DUMMY

RESET#

GND

HDLED+

HDLED-

System Panel Header This header accommodates

(9-pin PANEL1) several system front panel

(see p.11 No. 17) functions.

Chassis Speaker Header Please connect the chassis

(4-pin SPEAKER 1) speaker to this header.

(see p.11 No. 21)

+5V

DUMMY

SPEAKER

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 52 53

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ASROCK H55M/USB3 R2.0 User Manual Page 22