GTX 480 is installed and works fine though I did have to reinstall Windows. Once the NV driver loaded during startup I got all kinds of 2D display corruption. In early benching my 6850s are definitely more than "2% faster". For example, 3DMark 11 scored a thousand points less (however, the results page did tell me my score was "low" for my system so maybe missing a driver setting/tweak--Texture Filtering on High Perf and AA and AF on app-controlled...much less familiar with NV drivers and their interface). Using 290.53 beta at present (not the latest but sounded like a good choice for my card after some quick reading).
Wanted to try playing Caspian at both 2x and 4x MSAA but then the damn PB problem was back and I got kicked consistently during joining.
“i dont care what consoles have they dont have mouse and keyboard” -crazyeyesreaper