Power Supply Fan Up Or Down. It's a good question, and a topic of much debate as with most cases you have the choice of either orientation. To figure out whether your PSU fan needs to point up or down, start by looking over your PC case.
Modern personal computers universally use switched-mode power. It's a good question, and a topic of much debate as with most cases you have the choice of either orientation. Properly setting up your computer case fans is essential for efficient PC cooling.
If the fan isn't turning on its likely because its broken.
The placement of the power supply is optional.
I understand, the main PSU fan is an intake, and it exhausts through the back mesh (where the power cable plugs. This is one of those arguments thats raged for years, a bit like the positive or negative case pressure debate. Should I install the PSU with the fan pointing in or out of the case?