I would like to replace my PSU in my Dell XPS 8920. It currently has a 460W model D460AM-03. While I understand it's ATX compatible, I believe that doesn't guarantee all other ATX compatible PSU are of equal size. I noticed many PSU units don't list their dimensions. Is there an easy way to know a compatible PSU will fit before ordering?
Will the EVGA P/N: 100-W1-0500-KR likely fit in a Dell XPS 8920 desktop? And would it be an upgrade from the original, other than just the 460W to 500W difference?