The power supply on a computer transforms the alternating current from the wall outlet into a direct current flow that the computer's components can use. Testing the DC voltage output of the power ...

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

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.

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

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.

Power supplies are a little more complex than they seem, and with the new ATX 3.0 standard, they're getting even more so. Check out this PCWorld guide to the PSU on YouTube!

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. The power supply ...

Standard ATX power supplies aren't designed to turn on unless they are properly connected to a motherboard. This helps to ensure that they can't power up and damage computer components if the plug ...