ASRock 890GMH/USB3 manual ATX 12V Power Connector Please connect an ATX

	Though this motherboard provides 24-pin ATX power connector,		12	24
	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.
		20-PinATX Power Supply Installation	1	13
ATX 12V Power Connector		Please connect an ATX 12V
(4-pin ATX12V1)		power supply to this connector.
(see p.12 No. 3)

Serial port Header

(9-pin COM1)

(see p.12 No.27)

1

RRXD1

DDTR#1 DDSR#1

CCTS#1

RRI#1

RRTS#1

GND

TTXD1

DDCD#1

This COM1 header supports a serial port module.

2 8