i play an MMO every evening on my gaming desktop and know exactly how it should feel... after installing ASUS P8Z77-V LK Intel Graphics Driver 9.17.10.3223, its noticeably choppier, frame times are all over teh place, and tonight it even crashed once:

Fatal error
The game has crashed and will now close.
DXGI_ERROR_DEVICE_REMOVED
The GPU device instance has been suspended.
i haven't changed any in-game settings. Temps look normal. Is it possible a driver update makes things this much worse, or am i imagining it?
