Whenever I play a game for about 3-10 mins, the GPU's memory controller load drops to 1/0% and the GPU load goes to 99% - this happens in all games. The temperature doesn't exceed 83 C, with an average of 74 C. It started about 2 months ago, but has gotten very bad recently. I have the latest drivers etc. and have had the system (a laptop) since december '10. Anyone had this problem? Any suggestions.