passthrough

I'm looking for a used gpu for my htpc. It should support 3D, HD audio passthrough etc. Looking for models like GT520 or 440 or equivalent amd gpu. No gaming.

i'm accesssing internet through my htc wildfire s which is connected to my laptop through internet passthrough.. the problem is that-web pages donot open up in opera but they do open in default browser..is opera unable to open pages while in this mode..is there any fix?? and i can't even...