I have a fine little Gigabyte GA-G31M-ES2L micro-ATX mb that I'll be using
for a HTPC shortly. I'm just waiting for the HDMI graphics card to arrive.
I'm reading from the graphics card manual that the S/PDIF cable, which is
just two wires, gets connected to the graphics card and then gets connected
to the mb. The graphics card is a GIGABYTE GV-N84S-512I, and it has a two
pin cable connection for the S/PDIF output.

http://www.newegg.com/Product/Produc...82E16814125289

However, the S/PDIF header on the mb actually has three pins: #1 (power), #2
(SPDIFO), #3 (GND). Am I correct in assuming that I will only connect the
cable to pins #2 and #3? If that's right then what is the power pin for? If
I'm wrong then I'd appreciate a better understanding of how to proceed.

Thanks,

--
Jan Alter