For identifying the right power supply try eXtreme Power Supply calculator, it’s worth the 2 bucks to sign up. You basically get to choose every component and it will calculate the PSU you should have.
Works great. Since the components are on the wall, drinks spills are not a problem, just on the keyboards and mouse like always. LOL With cats that jump up on the desk all the time, sometimes in a flat out run, we have learned where to stash the cups and cans so they don’t go over. Last three spill have been me, no cure for that. LOL