How To Check Power Supply On Windows 11 _hot_ Jun 2026

If you bought a pre-built PC (like an HP, Dell, or Lenovo) and don't want to open it:

For desktop PCs, software cannot measure voltage accurately. You need to check the physical unit. Warning: Only do this if you are comfortable with hardware. how to check power supply on windows 11

Here are the three ways to check:

You must look at the sticker on the physical metal box inside your computer. If you bought a pre-built PC (like an