Hi
I'm running an nVidia GTX 680 video card in Windows 8 and using the latest driver package 314.07. I just ran a scan at nVidia's site and it said this is the latest driver.
I'm not having any problems, I have installed, on my computer...
The Secret World and the new Tomb Raider, Wow, Age of Conan, Skyrim, The Lord of the Rings Online, Dragon Age 2, Guild Wars 2, The Witcher 2, several other Tomb Raider games, and a couple of flight, sims everything runs great and I'm running most of them in stereo 3D.
I just don't know what's going on with your computer.
My friends are all running nVidia cards too, and no one is having problems in either Windows 7 or 8?
I just don't have any other ideas, but the fact that you have problems with both Windows 7 and 8 seems to indicate some problem in your computer, maybe there is some bug in your video card itself.
I hate hardware issues, software I can usually sort out but hardware can be a nightmare if you don't have a bunch of stuff lying around to swap out.
If you can get another video card to try that might tell you whether it's the card or not.
You could try unseating your card and putting it back in, I don't have a lot of hope that, that would make any difference but it's worth a try, maybe change slots if you have one free.
Mike