GIGABYTE GA-8I865GMFK-775 - Manual (Page 67)

Appendix - 67 -
English
SPDIF Output Device (Optional Device)
A "S/PDIF output" device is available on the
motherboard. Cable with rear bracket is provided and
could link to the "S/PDIF output" connector (As
picture.) For the further linkage to decoder, rear
bracket provides coaxial cable and Fiber connecting
port.
1.
Connect the SPDIF output device to the rear bracket
of PC, and fix it with screw.
2.
Connect SPDIF wire to the motherboard.
3.
Connect co-axial or optical output to the AC3 decoder.