wow im amazed i didnt know nvidia cards, could do that! and whats worse i wondered what the connector was for on my own graphics card 9800gx2
I had to spring clean the card recently (it developed a death rattle from the cooler), and a little cover pinged off revealing the connector. Scratched my head, nothing in the manual, so assumed it was a manufacturing thingy
as you do :D
So ive looked into it and apparently (havnt tried it yet) you can connect the graphics spdif passs through to your motherboard and then audio will 'pass through' over the hdmi.
Well thats the theory.
personally i havnt seen any one do this or heard of it till now.
the learning curve shot up a notch.
'and then the lid fell off', revealing...pic 7
you mobo is quite advanced compared to my own and from your manual you have a spdif output on board, this should be sufficient to input to a reciever on a 5.1 surround sound system if you have one.
ps ive pm 'd you if you dont mind another subject regarding your pc.