One of the most important parts in the computer is the power supply. Without a PSU you obviuosly can't power up the computer and a PSU of bad quality can turn the computer very unstable. Unfortunately many people buy the cheapest one available and choose to put their money on a faster processor or such. This is not always a good choice and hopefully you will understand why after you have read this article. The purpose of this article is to answer any potential questions that could arise in coherence with power supplies. The article brings up several different sections which has to do with the PSU, among other things, how they work and why they are needed at all.