Just one question, when you say:
If you are serious run your atx at 240v. Better efficiencies no matter the brand.
Do you mean better power efficiency? If so, how do you configure PSUs to run at 240v? At stock they run at 220v right?
Would love to know more.
He's probably from US, where they have 110V. And since PSUs are more efficient at 220+V, they sometimes use some extra hardware to get higher voltage than they're supplied with. We've got 220V in Europe straight from our outlets, so we just plug our PSUs in. But most decent PSUs can run off anything in between 100V and 240V. I suppose if you're going to "mod" you power to get higher voltage, you might as well go all the way up and make it 240V.