There is no software that can tell you exactly what model of power supply is installed. However, tools like or Open Hardware Monitor can tell you how much power your system is currently drawing .
When reviewing or reporting on a PSU, confirm the following three data points: how to check what power supply you have
If the sticker is facing the inside of the case or is hidden behind a shroud, you may need to use a flashlight or a phone camera to take a picture of it. There is no software that can tell you