Re: Perhaps a stupid question, but do all power supplies fit into any case?
For the most part most PSU's will fit into most cases. The ones that could be issues are power supplies that are over 1000W, those may be longer than a standard ATX PSU. Another issue would be in a micro tower, or slim case. If you just have a normal tower cases, pretty much anything you pick will be fine.
You can always measure what you have and compare it to what you want to buy.
TSF does not support assistance through email or private messages, please keep all questions in the open forum.