Just bought a Razer Barracuda AC-1, what should I expect lol

Seen the auction ending on ebay and it was new unopened, and hell of a lot cheaper than anywhere on the internet… I happened to have some paypal, so I bid and won lol

I seen it does Encoding to Dolby Digital which is something I have been wanting for games…. but I am running Vista so not sure what to expect lol

So anyway anyone care to chime in on this card? It will mostly be used for DVD, HDTV, TV and games, then occasionally MP3s