(most reliable) Open your computer case and look at the sticker on the side of the power supply.
Here are the most effective methods to check your power supply wattage, ranging from physical inspection to digital estimates. 1. Check the Physical Label (Most Accurate) how to check power supply wattage
Shut down your PC and unplug it from the wall. (most reliable) Open your computer case and look
Before we dive into the process, let's understand why checking power supply wattage is essential: Google it for the spec sheet.
If you see a model number like “ATX-600W” or “Corsair CX550M” on the label, Google it for the spec sheet.