Wow didn’t notice how hard it is to get a platinum 500w power supply in 2023… The only one being a Seasonic or Silverstone one for over 200$ (CAD).
Maybe these one?
https://www.newegg.ca/evga-supernova-650-p5-220-p5-0650-x1-650w/p/N82E16817438225
(Last I checked EVGA branded PSU are Seasonic, been using those for a decade, no issues.)
https://www.newegg.com/be-quiet-bn650/p/1HU-004H-00054
Also a good brand.
P.S. You never mentioned the cost of your build. 😉
Well getting a better rated PSU for a higher price might help in the long run, you will have to do the math although going with the efficiency of Platinum versus Gold its not a lot.
Europe Electricity is still around 43 cent/KWH?