How Do I Check My Power Supply Wattage ^hot^ May 2026

Here are the four best methods, ranging from simple detective work to using physical labels. Every PSU has a sticker. This is the only way to get 100% accurate information.

If you are upgrading to a powerful graphics card (like an RTX 4070 or above), do not guess. Open the case and read the sticker. A 750W PSU looks identical to a 400W PSU from the outside—don't risk frying your new hardware. Have a tip for finding stubborn PSU specs? Let us know in the comments below! how do i check my power supply wattage

But unlike your RAM or CPU, Windows doesn’t have a built-in tool that tells you your PSU specs. So, how do you find out how many watts your power supply has? Here are the four best methods, ranging from