Let’s break down the four levels of measuring your PC’s appetite, ranging from "quick estimate" to "lab-accurate." If you just want a ballpark figure to see if your old 550W PSU can handle a new graphics card, start here.
Here is the hard truth:
Whether you are trying to save money on your utility bill, sizing a backup battery (UPS), planning a silent low-heat build, or simply making sure your 750W power supply isn’t about to blow a fuse—knowing how much power your PC is actually using is a superpower. how to tell how much power my pc is using