To find out your computer's maximum power capacity, you must inspect the physical unit or its documentation, as standard Power Supply Units (PSUs) and cannot report their maximum wattage via Windows software or BIOS.
While programs like or OCCT can show you how much power your components are currently using, they cannot "see" the maximum capacity of your PSU. The PSU is a "dumb" component in terms of data—it provides power but doesn't report its total ceiling to the motherboard unless it is a high-end "digital" PSU with a dedicated USB data connection. how to check computer power supply wattage
| Method | Accuracy | Requires Tools? | Provides PSU Rating? | Risk Level | | :--- | :--- | :--- | :--- | :--- | | | High (100%) | Screwdriver | Yes | Low | | Online Calculator | Medium (Estimate) | None | No (infers need) | None | | Power Meter | Medium (Efficiency dependent) | $20-40 meter | No (measures draw) | None | To find out your computer's maximum power capacity,