My mac has been working pfectly until about a week ago. My games have dropped fps by 15-20 in Guild Wars and Half-Life 2 Series/Counter-Strike Source an etc. My mac fans used to turn on and get loud when im playing and now it dosent change speeds at all, its fan speeds seem very low. My mac now has been idleing at 65-70c and when gaming it reaches up to 85c. I even formated my windows side(Only for gaming) and it didnt help. I ran 3DMark06 and my scores dropped from 4407 to 3806. I have noticed the screen start artifacting a couple of times when I game and I quickly shut down the computer and restart. Its only hapened 4 times. All I use on windows side is a couple of games and everything is all updated including drivers. On my mac side it idles around 55c and then goes up to 65-70c if doing anything extreme.