I have an issue with NVIDIA 7600GT video card on Windows7. Periodically it behaves strangely. In 3d games in has some strange artifacts and extremely low FPS (0-2) instead of 15-25. If I disable and enable it again in Device Manager, then it works fine. But after some time(I didn't found regularity), it again hungs. I tried a couple of video drivers, but the result is the same. And I tested it on two different computers with the same video card and an issue still reproduces.
Does it mean that video card is almost dead?