ASRock ZH77 Pro3 manual ATX 12V Power Connector, Serial port Header This COM1 header supports a

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.

20-Pin ATX Power Supply Installation

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ATX 12V Power Connector	8	5
(8-pin ATX12V1)
(see p.2, No. 4)	4	1

Please connect an ATX 12V power supply to this connector.

Though this motherboard provides 8-pin ATX 12V power connector, it can still work if you adopt a traditional 4-pin ATX 12V power supply. To use the 4-pin ATX power supply, please plug your power supply along with Pin 1 and Pin 5.

		8	5
	4-Pin ATX 12V Power Supply Installation
		4	1
Serial port Header	This COM1 header supports a
(9-pin COM1)	serial port module.
(see p.2, No. 28)

HDMI_SPDIF Header

(2-pin HDMI_SPDIF1) (see p.2, No. 29)

1

GND

SPDIFOUT

HDMI_SPDIF header, providing SPDIF audio output to HDMI VGA card, allows the system to connect HDMI Digital TV/ projector/LCD devices. Please connect the HDMI_SPDIF connector of HDMI VGA card to this header.

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ASRock ZH77 Pro3 Motherboard