Search for terms like "invoice," "order confirmation," or "spec list."
| 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 |
The PSU is the large metal box usually located at the top or bottom rear of the case. It is where the power cord connects from the wall.
For any upgrade involving a high-power GPU (over 150W), physically verify the +12V rail’s amperage (A) and total continuous wattage (W) printed on the PSU label before purchase.