ASROCK Z77 Pro4-M User Manual page 34

Serial port Header
(9-pin COM1)
(see p.2, No. 27)
HDMI_SPDIF Header
(2-pin HDMI_SPDIF1)
(see p.2, No. 34)
34
ASRock Z77 Pro4-M Motherboard
This COM1 header supports a
serial port module.
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.