How to Measure Power Supply in a PC

Whether you are interested in improving your computer or simply monitoring its health, knowing how much power your machine uses is essential. It is difficult, however, to wade through your computer's specifications to determine how much AC power it needs, if that information is even provided in your machine's manual. A much easier and more reliable way to see just how much juice your machine uses and needs is to download a power supply calculator, also called a PSU calculator, to accurately measure power usage.

• 1

  Download a free PSU calculator (see Resources).

• 2

  Double-click on the downloaded file to install the PSU calculator.

• 3

  Run the PSU calculator to display an accurate calculation of how much power your computer is using.