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C. Connect Ground (GND) to Ground (GND).
D. MIC_RET and OUT_RET are for HD audio panel only. You don't
need to connect them for AC'97 audio panel.
E. Enter BIOS Setup Utility. Enter Advanced Settings, and then select
Chipset Configuration. Set the Front Panel Control option from
[Auto] to [Enabled].
System Panel Header
(9-pin PANEL1)
(see p.2 No. 18)
Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.2 No. 17)
Chassis and Power Fan Connectors
(4-pin CHA_FAN1)
(see p.2 No. 25)
(3-pin PWR_FAN1)
(see p.2 No. 4)
CPU Fan Connector
(4-pin CPU_FAN1)
(see p.2 No. 3)
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.
ATX Power Connector
(24-pin ATXPWR1)
(see p.2, No. 8)
ASRock H55M Pro Motherboard
This header accommodates
several system front panel
functions.
Please connect the chassis
speaker to this header.
Please connect the fan cables
to the fan connectors and
match the black wire to the
ground pin.
Please connect a CPU fan cable
to this connector and match
the black wire to the ground pin.
1 2 3 4
Pin 1-3 Connected
3-Pin Fan Installation
12
24
Please connect an ATX power
supply to this connector.
1
13
2 5
2 5
2 5
2 5
2 5
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