Let's take a look at where is the general computer power supply! The computer power supply is one of most important part of the computer, and the computer cannot work if without it. That is why the installation and placement for the power supply of the computer are also exquisite. Generally, the computer power supply is located at the back side of the computer case. Some of power supplies are located upper part and some of them at the lower part.

Take an example, the power supply of my computer is at the back side at the upper part of the computer.

Actually, in my opinion, it seems more reasonable when the design and arrangement of the power supply position at the back side both of upper and lower part. Put the power supply at upper part because it is not easy to be top-heavy falling which will be caused by gravity when installed at the lower part. But if we put the power supply installation on the upper part will less be affected by the dust. It is depending on the design of the computer case.