I want to find out if my Antec Gamer 620W is faulty in my computer. Can I replace it with an Antec Earthwatt EA-650 that's been running in another computer since 2009? I saw there was 3 rails in the Earthwatt... Am I gonna damage or fry something if I use that one?
rails have no effect on power for most cases. The rails are located before the transformer/multiplier i believe, so you are technically getting the effects of a single rail with your molex/power cables. EarthWatts from Antec are pretty decent PSU's too. No issues at all.