ASRock 970 Pro3 R2.0 manual Serial port Header

Serial port Header	This COM1 header supports a
(9-pin COM1)	serial port module.
(see p.15 No.28)

HDMI_SPDIF Header

(2-pin HDMI_SPDIF1) (see p.15 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.

USB 3.0 Header	Besides two default USB 3.0
(19-pin USB3_2_3)	ports on the I/O panel, there is
(see p.15 No. 37)	one USB 3.0 header on this
	motherboard. This USB 3.0
	header can support two USB 3.0
	ports.

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