i think because my mobo is ati brand, it is not very compatible with my geforce gtx 560.the video card's fan is blowing down instead of up into the exhaust fan.i am confused to put my new fan on intake or exhaust.i figured if it was exhaust it would suck out the hot air from the video card but i dunno.heres a crappy drawing of it.oh and the power supply has no fan.