ASROCK P55 Extreme User Manual page 36

HDMI_SPDIF Cable
(Optional)
A. black end
+5V
SPDIFOUT
blue
GND black
Please connect the black end (A)
C
of HDMI_SPDIF cable to the
B
HDMI_SPDIF header on the
A
motherboard. Then connect the
white end (B or C) of
HDMI_SPDIF cable to the
HDMI_SPDIF connector of HDMI
VGA card.
B. white end (2-pin) C. white end (3-pin)
SPDIFOUT SPDIFOUT
blue
GND black
3 6 3 6 3 6
3 6 3 6
blue
GND black