GamingPC Hardware

How to Choose a Good Power Supply?

Choosing a good power supply is pretty easy. Let’s see what to look for.

First of all … don’t choose the cheapest power supply!¬†You don’t want your PC on fire because of a cheap, low quality power supply!

Needed features

  • At least 80+ certified PSU – to be sure that the PSU you’re buying has a decent quality, look for an 80+ rating. You can check out what those ratings mean in the second part of the article.
  • At least 100 watts of spare power – every part of your PC consumes an estimated max wattage in its peak, you can find out what is the sum of all your parts and add 100 watts to this number. You can check out how much your parts can consume in sites like¬† Usually, an average PC will work fine with 400W power supply. For a mid-high end gaming PC, at least 550W is needed (for a PC with 1 GPU of course).
  • Needed form factor – if you’re building a small form factor PC, your case might not support full-size power supply, so check out if the PSU will fit in your case.
  • Needed connectors for the motherboard and GPU – most modern power supplies have enough connectors but it’s a thing to check out before buying, especially if you’re going to use more than one GPU or a lot of fans.
  • Quiet fan – it may look like a stupid thing to look for in a power supply, but we’ve had cases when the power supply’s fan was louder than the whole PC itself…

Optional features

  • Modular power supply – some modern power supplies come with connectors on the back instead of all cables coming from inside the power supply. This helps for better aesthetics as you can just not plug the cables that you don’t need.
  • Fanless – some of the modern power supplies don’t even need a fan, so some of them are without fans or have a button to turn the fan off.


  • Lesser cables in the case help keeping everything cooler – well, it’s not true. A few cables won’t affect your cooling at all! It looks better if they’re not visible, but they don’t affect cooling.
  • Higher wattage power supplies draw more electricity – not true, higher power supplies will use the same amount of power as lower wattage ones. The power supply will use the amount of power required by the other components in the system. PSU’s wattage is the maximum power that the power supply can deliver to the other components.
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