How to Choose the Best PC Power Supply

A PC power supply is an important part of any computer system. It provides the electricity needed to run the machine and all of its internal components. But it can be difficult to determine which model is best for you, as there are a variety of factors that come into play! The following article will help you understand what makes a good power supply and how to choose one.

How much power do you need?

First, it is important to determine how much power your hardware actually needs. This is measured in watts, so the first step is to understand what this means for your computer. All devices have a wattage requirement that must be met in order to function properly. There are plenty of charts available online that list the wattage typically required for each component in your system, but this can vary depending upon how many of these components you plan to use at once.

For example, if you are building a high-performance machine designed to power multiple monitors (or perhaps even three or four), then your power supply must be able to handle the increased wattage.

This is why it is important to buy a unit that has enough power for your needs, but not too much more you don’t want to spend too much money or risk shortening the life of your PSU by using one with unnecessary power capacity.

Different types of connectors

In addition, there are different types of connections for the cables that your components will use. There are two types of power connectors: 20 pins (most common) and 24 pins (less common).

While the main difference is how many pins there are, it is still important to make sure you have enough connections for all of your components. The motherboard typically uses up the most connections on a power supply, but it is also good to have extra connections in the event that you need to add on some other components later.

How efficient is it?

Another important factor of a power supply is how efficient it actually is. This refers to how many watts are lost during the conversion process, kind of like how an air conditioner loses some of its power when transferring heat from the air to the outside. Look for units that have a high-efficiency rating, typically at least 80 percent.

How much noise does it generate?

Power supplies produce some amount of noise during operation. The most common complaint is that they hum or buzz while turned on, which can be irritating if you’re trying to watch a movie or play on your computer. Look for units with little noise generation, but keep in mind that it is entirely possible for some of them to have this issue depending upon how powerful they are!


While not technically an important factor of the power supply itself, you may also want to consider whether you care about how your computer looks. There are many different shapes and sizes from which to choose, as well as a range of colors or a choice between a black or silver finish.


A PC power supply is an essential part of any system, but it can be difficult to determine which one will meet your needs. Keep these tips in mind when choosing a new PSU, and you should be able to find the right model for your system.

An hour of research on the internet can save you money by showing you how to choose the best power supply. Hopefully this article is helpful in your search.