Building a custom PC is an exciting and fulfilling endeavor. However, it can quickly become daunting when selecting a suitable power supply unit.

Best power supply 2025 Find out how to pick the best PSU for your gaming PC with our comprehensive guide, with choices from Corsair, EVGA, Gigabyte, and more.

The power supply isn’t like other components in your computer, bigger is actually better. Here’s how to figure out how big a power supply you need.

If you want to test the Power Supply Unit (PSU) of your Windows computer, use one of the methods mentioned in this post.

The power supply is the beating heart of your gaming PC, the part that circulates the vital life-blood of power around your expensive processor, motherboard, and graphics card.

How many Watts does your computer use? These Power Supply Calculators will help you measure your PCs total power consumption & calculate the energy use.

Try a different power cable and wall socket to make sure neither is dead. Check all internal connections inside your PC, especially power connectors to peripherals.

So you’re building a gaming PC for the first time—or maybe you’re building a certain kind of gaming PC for the first time—and you want to be sure you get the right power supply for it ...

The power supply in your computer manages all of the power required to run each component of your computer. When this critical component begins to fail, your computer may power off unexpectedly ...

How to Test a Computer Power Supply Using a Voltmeter. The power supply on a computer transforms the alternating current from the wall outlet into a direct current flow that the computer's ...

Power supplies are a frequently misunderstood—and overlooked—PC component. Many users choose a PC power supply based on total wattage alone, assuming that higher is always synonymous with better.

There are a lot of components to consider in your PC. So what size power supply should you get to provide juice for them all?