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Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.2 No. 14)
Chassis Fan Connector
(3-pin CHA_FAN1)
(see p.2 No. 19)
CPU Fan Connector
(4-pin CPU_FAN1)
(see p.2 No. 6)
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. 7)
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. 1)
Serial port Header
(9-pin COM1)
(see p.2 No.33)
2 4
2 4
2 4
2 4
2 4
4 3 2 1
12
24
1
13
20-Pin ATX Power Supply Installation
ASRock
A780LM
Motherboard
Please connect the chassis
speaker to this header.
Please connect a chassis fan
cable to this connector and
match the black wire to the
ground pin.
Please connect the CPU fan
cable to this connector and
match the black wire to the
ground pin.
Pin 1-3 Connected
3-Pin Fan Installation
Please connect an ATX power
supply to this connector.
12
1
Please note that it is necessary
to connect a power supply with
ATX 12V plug to this connector.
Failing to do so will cause power
up failure.
This COM1 header supports a
serial port module.
24
13
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