ya, thats what i did, i put one 80mm on the back and taped everything else off and turned that thing up high, makes it a lot cooler, also i glued a fan to my x300 which i see you dont have a fan on it.. i would put one on there, i cant believe dell didnt put a rear case fan and didnt put decent x300's in there with fans... unbelievable.. my x300 burnt my finger when i touched it after gaming, it may be able to handle that, but i personally am not comfortable with a card, or anything for that matter being THAT hot