Just thought I should post this since I have seen severals posts claiming that the GFFX is performing better at the WMVHD videos than the 6800. Well I just upgraded tonight from a Gainward 5900 128M O/Ced to 475/950 to a BFG 6800 Ultra OC on a A64 3200+ (754 chip so it has 1M cache). Since this seemed such a hot topic and I didn't want my new video card to tank on playback of DiVX/DVD/WMVHDs. Using the 1080p version of "Step Into Liquid" both of my cards performed close to identical (e.g. both run in the 65-80% region) using the same driver 67.02. I understand this does nothing to show that the 6800 WMVHD hardware acceleration is working (actually the opposite), but this is at least one example that there is no decrease in playback performance between the 5900 and 6800 Ultra OC using 67.02 drivers. I should also add that playing DVDs and DivX this number was in the low teens to low twenties, so no problems at all.
Realistically I bought the card for the 3D performance and not the video playback, but at the same time I didn't want to get downgraded performance. Overall I am quite pleased with my new 6800 Ultra OC.
-Malichite