ASRock Z77M manual Serial port Header This COM1 header supports a, Serial port module

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.		5	1
	4-Pin ATX 12V Power Supply Installation	8
			4
Serial port Header	This COM1 header supports a
(9-pin COM1)	serial port module.
(see p.2, No. 24)

HDMI_SPDIF Header

(2-pin HDMI_SPDIF1) (see p.2, No. 28)

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 Z77M Motherboard