How To Check | Psu

| Wire Color | Rail | Expected Voltage (ATX Spec) | Tolerance | | :--- | :--- | :--- | :--- | | | +12V | 12.00V | ±5% (11.40V - 12.60V) | | Red | +5V | 5.00V | ±5% (4.75V - 5.25V) | | Orange | +3.3V | 3.30V | ±5% (3.135V - 3.465V) | | Blue | -12V | -12.00V | ±10% (Legacy rail) | | Purple | +5VSB | 5.00V | Standby Power (Always on) |

For efficient diagnosis, follow this order: how to check psu