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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. 17)
ASRock H71M-DG3 Motherboard
20-Pin ATX Power Supply Installation
Please connect an ATX 12V
power supply to this connector.
This COM1 header supports a
serial port module.
12
24
1
13
23
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