While I agree fresh air intake is optimal, when you only have one fan in the system your first priority should be to exhaust the heat...otherwise it has nowhere to go and gets trapped...I went ahead and switched it around myself...first time opening a PSU and nobody got hurt:roflmao:
+1. If I'm trying to make a machine last, I add more small fans to blow on the the hot stuff and stir the air. Then I feel better about using the PS fan to inflate the case.
The real benefit of reversing the PS fan is controlling dust that is normally drawn in thru the floppy drives, etc. After the PS fan is turned to blow in, an air filter should be added to the back intake. It is then a simple matter to clean the air filter periodically (much easier and safer than cleaning out a floppy drive).
Compared to modern CPUs and graphic chips, near stock Amigas don't generate near as much heat.
