This is what the PSU looks like View: https://imgur.com/a/n0LUQ7dThe psu has a decent wattage, unlike 240-300w I hear of on most of the prebuilts. But it's still and old oem unit from a workstation, so you should think of an upgrade in the next years.
Anyway, we can't do much without your pc specs, maybe a picture of the power supply.
The good news is that the motherboard has a standard 24 pin connector, so any third party power supply should work fine. Thought you must never cheap out when buying a psu.