Some of my games on my system seem to crash due to overheating of my HD4850 when there isn't much going on in the game, like it's on the menu or something. According to CCC the card seems to gradually increase in heat. Some graphic intense games such as Crysis do not crash, but the games such as Call of Duty 2 or MLB 2K9 do. Right now my card is using a different from the manufacturer cooler (Artic Cooling Accelero A2).please help.