How To Check Power Supply On Pc [extra Quality] Jun 2026

The tester screen will display all rail voltages simultaneously.

While the paperclip test tells you if a PSU turns on, it doesn't tell you if the voltage is stable. A simple $20 PSU tester is a highly recommended tool for any PC builder. how to check power supply on pc

If you have gone through the steps above and are still unsure, the only definitive way to check a PSU is to swap it out. The tester screen will display all rail voltages

If any reading falls outside the safe tolerances, replace the PSU immediately. Step 5: Check Voltages via BIOS / UEFI how to check power supply on pc