Hello i recently got alienware m17x running with 8 gb ram,  Q9100 and GTX 280M sli ... when i play games like Medal of Honor on maximum the game runs without any lags and after 5 minutes fps drops to 5-10 fps for few seconds... myne driver version is: 280.26 also i tryed newer but didnt helped also it happens in cod 4 but very very rarely when im playing for long time any solutions?