How To Check What Power Supply You Have Repack Jun 2026

Remove the side panel of your PC case (usually held by two thumb screws). Locate the large metal box where the power cord plugs in. Look for a large sticker on the side of the unit.

If the sticker is facing the inside of the case or is hidden behind a shroud, you may need to use a flashlight or a phone camera to take a picture of it. how to check what power supply you have

Most power supplies are "dumb" components. They provide electricity but do not transmit data like their name or wattage to the motherboard. Because of this, opening your case is the only 100% foolproof way to check. Remove the side panel of your PC case

Warning: If you cannot find the sticker or the wattage is unknown, it is highly recommended not to install high-end components (like modern graphics cards) until you verify the unit, as insufficient power can damage components. If the sticker is facing the inside of

Knowing your power supply unit (PSU) model, wattage, and efficiency rating is important for upgrades or troubleshooting. Here are the most reliable methods:

Some modern, high-end power supplies feature a USB connection that plugs into your motherboard. These "digital" PSUs can report their status to software.