If you're going to be gaming I wouldn't suggest using a stock CPU cooler. I'm not an expert in this sort of thing, but I would suggest an aftermarket cooler if you can afford to get one before you game. I suppose for short sessions maybe 2-3 hours it will be fine, but I wouldn't have any 5hr+ sessions just to be on the safe side. I'm very paranoid of hardware failure though, so I treat all my own and other peoples stuff like it's a kings, so I may be exaggerating it. If it were my call though, I wouldn't game for more than 5 hours without taking a break. And I'd try to get an aftermarket CPU cooler as soon as possible just to help lower temps.