[Ramrod]

Because unless you have figured out a way of blowing cooled air into the PC on a hot day then you are still dependent on the room temp air to have a cooling effect . It doesn't matter how much air you are blowing in/sucking out of the box.......if the room temp is too high you are going to be drawing in warmer than usual air and find your cpu/gpu getting hotter than usual and hence the fans spinning faster than usual......