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Chassis and Power Fan Connectors
(3-pin CHA_FAN1)
(see p.2 No. 15)
(3-pin PWR_FAN1)
(see p.2 No. 10)
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)
Though this motherboard provides 24-pin ATX power connector,
it can still work if you adopt a traditional 20-pin ATX power supply.
To use the 20-pin ATX power supply, please plug your power
supply along with Pin 1 and Pin 13.
ATX 12V Power Connector
(4-pin ATX12V1)
(see p.2 No. 2)
Serial port Header
(9-pin COM1)
(see p.2 No.27)
2 6
2 6
2 6
2 6
2 6
ASRock
Please connect the fan cables
to the fan connectors and
match the black wire to the
ground pin.
Please connect the CPU fan
4
cable to this connector and
3
2
match the black wire to the
1
ground pin.
Pin 1-3 Connected
Please connect an ATX power
12
24
supply to this connector.
1
13
20-Pin ATX Power Supply Installation
Please connect an ATX 12V
power supply to this connector.
This COM1 header supports a
serial port module.
M3A790GMH/128M
Motherboard
3-Pin Fan Installation
12
1
24
13
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