Originally Posted by frenchy2k1
Reading comprehension fail...
Those high definition audio devices are the sound devices included in your graphic card.
All recent graphic cards with HDMI have sound devices to be able to output your normal sound (not just pass through from DVD/bluray) through your HDMI without requiring a cable from your sound card. The drivers should be included in the graphic drivers automatically (they are for NV, haven't used an ATI since my 4850).
Are you sure your x-fi has not been recognized automatically
My X-fi Xtremegamer wasn't, on 7 Ultimate. The only drivers that would work were the Win7 betas on Creative's site, which I believe are also the same required for his Fatal1ty.
Here's a list for the OP.