My game runs properly for a couple of minutes - then all of a sudden I drop from about 60 frames depending where I am to exactly 13 FPS for roughly 10 seconds. The game becomes nearly unplayable. The problem persists for about 15-20 seconds then frames go back to normal. The longer I play the more often this occurs (up to twice a minute). Truly a gamebreaker. I have an i7 and an Nvidia Card with the latest drivers. {F32360}