How Do I Check My Psu Wattage <EXTENDED>

Here is the step-by-step guide, ranked from the easiest method to the most accurate.

Do not look at the "Input" number (which is often 100-240V). Look for the word "Total Power" or "Output" . how do i check my psu wattage

If you don't want to open the case, you can often find the specs digitally: Here is the step-by-step guide, ranked from the

A wattmeter (e.g., P3 Kill-A-Watt) measures how much power your PC , not the PSU’s rated capacity. But it helps estimate the lower bound. Here is the step-by-step guide