How To Check Power Supply Wattage Windows 11 Jun 2026

While Windows won't tell you the PSU's capacity , it can tell you how much power your components are currently using . Using Third-Party Tools

If you bought a prebuilt PC:

Get-WmiObject -Class Win32_SystemEnclosure | Select-Object -ExpandProperty SerialNumber how to check power supply wattage windows 11

Almost every PSU has a sticker on its side listing technical specifications. Look for the "Total Power" or "Max Output" value (e.g., 650W or 750W). While Windows won't tell you the PSU's capacity

Unfortunately, that can directly read the physical maximum wattage (e.g., 500W, 750W) of your power supply unit (PSU). Windows only sees how much power is currently being used by components, not the label rating on the PSU itself. Unfortunately, that can directly read the physical maximum

This only works on some OEM PCs (Dell, HP):

Unlike your CPU or RAM, the Power Supply Unit (PSU) does not transmit its specification data (brand or wattage) to the operating system. Therefore, you cannot find the exact wattage number through Windows Settings or Task Manager.