One of the largest components in any desktop computer is the power supply. It provides power for all the different hardware in a computer. It is able to provide, in fact, different voltages for different components. They usually have more than one type of connector on them, as well, which is important to figuring out whether or not they are compatible with a given build.
Computer power supplies also provide other elements to the operation of a computer that aren’t necessarily desirable. Just as computer power supplies do the hard work of providing power to the device, they also produce a great deal of heat that builds up in the case and their fans can contribute to the amount of dust that enters the system. They are sophisticated components and they are among the most important choices that builders have to make when they construct a system.