Sorry for the wait. As mentioned before, my knowledge of computers is limited so it took me a while to find out the PSU. The case I have hides the labels of the power supply so it took me a bit to find out how to take it out. The side of the power supply says "EVGA 500w"; here's a link to what it looks like https://www.evga.com/products/product.aspx?pn=100-W1-0500-KR. Thank you for your patience.
Seriously though, stop using UBM to measure performance as it really doesn't tell you anything reliable Also gaming performance can vary a lot depending on what you do in the game, and not everyone has X game to compare performance to yours.
Try Timespy as that will give a much, much clearer indication.
I agree that it shouldn't be used to measure performance, but I disagree that it doesn't tell users anything reliable.
It does have it's uses in helping to troubleshoot hardware and software issues, but people need to ignore the ratings - 'below expectations, above', etc.
Timespy isn't quite as clear as you say it is, compared to UBM, at least.
-it excludes how much space is being used on storage, nor does it reflect drive performance; it just gives a name and the max capacity
-it doesn't flag for high background usage
-it doesn't show how much memory is being reserved
-it only runs 1080p. There can be some rather conflicting combinations of hardware out there, and knowing if they're actually running outside of 1080p helps