here's something that pisses me off I can't get my 9800gx2 to work under vista x64. It works fine under xp pro x64 with drivers 174.74. under vista x64 any driver I install 174.74-175.12 vista will lock at boot up, but if I uninstall the nvidia drivers vista x64 boots up without a problem. my dfi x48 came with the latest bios from 3/20, so I guess I'm going to have to wait for this to get fixed by Nvidia