Im not sure if this is even in the same ballpark, but I know that with alot of new graphic card drivers (especially nvidia) you need to do a pretty thorough removal of the old driver before installing the new ones, else you can end up with issues. Ive used DriverCleaner (guru3d.com?)succesfully a few times. read instructions though, gotta uninstall driver, run in safe-mode, clean the cabs, etc etc.
If Henkka says he's got the same card and he's used a driver succesfully, seems to me youve almost certainly eliminated one variable (which driver to choose). Its time to explore what else is getting in the way.
Anywhoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo,
good luck,
mewa
