How To Tell How Much Power My Pc Is Using Jun 2026

Run a program like Cinebench (CPU) and FurMark (GPU) at the same time. This is the "absolute worst case." You will likely hit your PSU’s rated limit. Do this only if you have a quality power supply.

: This is a favorite for enthusiasts. After installing, open the Sensors tab to see real-time wattage for the "CPU Package" and "GPU Power". Download it from the official HWiNFO site. how to tell how much power my pc is using

If HWiNFO says your system draws 400W, your wall outlet might actually be pulling 460W. That 60W difference is heat lost inside your power supply. Run a program like Cinebench (CPU) and FurMark