I have Via HD Audio (version 7.031b.VIA) on this ASUS P5Q PRO TURBO/Core-2-Quad M-B, for 6 months now. Right now, the fibre-optic Toslink is dead to the world, and the 7.1 multichannel analog outputs are dead to the world. The only remaining use I have for it is the front headphone/microphone outlets (and the software always defaults to the rear inputs, no obvious way to change that !). So I now think that Via HD Audio is junk, and I would rather not have it on the M/B.