Say I were to get an 80+ gold psu. Would there be a significant saving of power compared to an 80+ bronze? I'm fine with my 80+ bronze I was just curious on the topic.
No :p There would be a 7 percent difference on 230V or 5 on 115V.
Depends on your actual usage. A system using 1600W at 80+ Bronze (actually using all 1600W) will save quite a bit of power were it at 80+ Gold.
If you're pulling 1600 watts then you shouldn't be thinking about bronze vs gold, right? :D