So you want to know how to see which power supply you have.
Sadly a power supply only sends power to the computer.
It does not send information such as their brand, wattage strength, efficiency rating, and so on. So there’s no program you can run to simply report that info to you.
Pre-assembled computers have their own model or serial number. This the only way to know which power supply you have without opening it.
You can use this to try and see the specific parts used inside. Googling this number might reveal which power supply you have otherwise try the manufacturer’s website.
If it’s a custom computer you can check the retail package that it came in. If you don’t have it and you ordered it online then check the site you ordered it from.
If you don’t know your computer’s model number or your detective work came up with nothing then you will have to open it.
To check what power supply you have to:
Pre-assembled computers usually have their power supplies at the back upper end of computers. Some custom cases, usually meant for gamers, place the power supplies in the back lower end.
If you don’t see a sticker on the power supply you may have to remove it. Sometimes manufacturers put the sticker on the side that’s not visible when you open up your computer’s chassis.
Every power supply has a sticker indicating: