The sound card I have is in the title. It only supports 2 channel stereo. True 5.1 is useless on this card and is only available via optical out. 7.1 is not even mentioned on this card, but is mentioned in tech specs from newegg and some other online retail stores.
Why does windows show 7.1 connections for my card? I took a screenshot here http://oi47.tinypic.com/19y148.jpg