p.s.. those premade systems you buy at the store only come with 1 fan...on the cpu. if your lucky youll get 1 in the back aswell. but in a hot room, those 1-2 60mm fans wont do anything for you but move that hot air around. but i dont know if u have store bought or you put it together urself. i, personally have 10 fans in mine, but my room is cool(not A/C) If it was hot...those 10 wouldnt do much.