Pretty sure it's overheating in the computer...Can't for the life of me understand why, this is the first time it has happened. When I take the side cover off it will not freeze or restart when playing games. So I was thinking about buying a new cooler for it. I have a Gigabyte 6600GT, what is the best cooler that I can purchase for it. I was looking at the new fatil1ty one, made by zalman? I think. I'm willing to spend about 50 dollars on it. I don't think its a powersupply problem, because that would just shut the computer down, and make a beep. When it freezes or restarts I don't recieve a beep.