ASROCK 880GMH/USB3 Mode D'emploi page 24

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. 3)
Serial port Header
(9-pin COM1)
(see p.2 No.27)
2 4 2 4 2 4
2 4 2 4
ASRock
20-Pin ATX Power Supply Installation
Please connect an ATX 12V
power supply to this connector.
This COM1 header supports a
serial port module.
880GMH/USB3 Motherboard
12 24
1 13