How To: Check My Power Supply Wattage

Knowing the wattage of your computer’s power supply unit (PSU) is crucial—whether you’re upgrading your graphics card, troubleshooting random shutdowns, or building a new PC from scratch. Unfortunately, unlike your RAM or CPU, Windows does not provide a direct software reading for PSU wattage. You’ll need to use one of several physical or indirect methods.

Knowing your PSU wattage isn’t just a number; it’s the key to stable performance and preventing costly hardware damage. Don’t guess—verify. how to check my power supply wattage

Below is a step-by-step guide to finding out how much power your PSU can deliver. The most reliable way to check your PSU’s wattage is to look at the physical unit inside your computer case. Knowing the wattage of your computer’s power supply