smth's off... a strategy game feels sluggish since the ForceWare Driver update and the FPS counter agrees with me.

Fatal error
The game has crashed and will now close.
DXGI_ERROR_DEVICE_REMOVED
The GPU device instance has been suspended.
that crash happened once too, im on a gaming desktop, ive restarted, reinstalled the game, and turned off recording, before I go back to the old driver, is there something I should check first? I would also like to understand how to measure this properly, because right now I am mostly going on feel and an FPS counter in the corner of teh screen. seriously need help here 馃槶