This has been a problem I had for a while now, my GPU is Ati 5850 but windows thinks is 3870, I go into dxdiag or a game for ex Deus Ex HR and there it is, it's not that big of a problem pretty much things work fine like DX11 but in DE:HR I can't select the advanced DX11 options because the system thinks I have an old 3870.
Now I would really like to solve this, should be a matter of just deleting the right files/registry right, problem is I've tried that uninstalled ati, used driver
swepper to remove everything ati related and the problem remains.
Maybe I had an 3870 before really can't remember, I did a dual boot with a new x64 Windows 7 and there everything is fine.
No, I don't want to reinstall windows, I have to many projects right now and don't want to mess with that.