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5 Things to Keep in Mind When Buying a Power Supply

When building a new PC, one of the most important things to get right is choosing the power supply. This decision should not be taken lightly because you want your system to last for years, and if you choose an inadequate power supply, it will fail early on. That’s why we compiled this list of 5 important things to keep in mind before buying a power supply.

The power supply is the heart of your system. It provides all the juice that your components need to run and perform as they should. – All modern PSUs (Power Supply Units) follow a standardized form factor called ATX12V v.24.

Let’s take a look at some of these important things to keep in mind.

1: 80+ certified

If possible go with an 80+ certified unit because these have better efficiency which means it can output its maximum power at less energy loss and also produces less heat.

2: How Many Watts Do You Need?

One of the most important things to consider before buying a PSU is its wattage. You want to make sure that your power supply can provide enough juice for all of your components. This includes not only the CPU and motherboard, but also any additional cards or drives you may have installed.

There are many calculators available online which can help you determine the required wattage for your system.

Outer Vision and Corsair PSU Calculator.

Make sure to include the max requirements of all your components when calculating, as well as a little extra for future upgrades.

Generally speaking it is better to buy a PSU that can power more watts than what you actually need so that when you upgrade or add new hardware in future.

3: Brand is Important

Choose a reputable brand with a good warranty. This will ensure that you have some peace of mind in case something goes wrong with your PSU down the road.

There are many brands available, but three of the most reputable are Corsair, EVGA and Seasonic. There are also some others well-known brands available like Be Quiet and NZXT you can also go with.

4: Cable Management

Having a PSU with cables that are too short can make your components difficult to install and manage.

This is why it’s important to go with a PSU that has cables that are long enough to reach all parts of your case.

Cable management is very import because it will help improve the airflow in your system and keep everything looking tidy and organized.

Related Article: Best PSU For Cable Management

5: Modular or Semi Modular

There are two types of PSU cables, modular and semi modular.

Modular PSUs have cables that can be disconnected and reconnected at will, while semi modular PSUs have a few permanently attached cables and the rest are modular.

The advantage of having a modular PSU is that you can remove any cables you don’t need and also rearrange them to improve the airflow in your system.

Although semi modular PSUs are cheaper, we recommend going with a modular PSU because it will give you more cable options and make installation much easier.


Power supply is most important part of pc build.

80+ certified units are better with less power loss and heat output, make sure to get enough wattage for all your components and buy a reputable brand.

Choose PSU with good cable management options so it’s easier to install, look for a PSU with long cables and make sure to go with a modular or semi-modular option.

Now you know the important things to keep in mind when buying a PSU for your next PC build.

Thanks, we hope you found this article helpful!

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