Open up your case and look at your PSU. If it gives an indirect amount of amps, take the total power, subtract by ~80(they usually overrate it, like it says 500W, but it can only supply 300W, mostly in OEM PCs) and divide that number by 12 and there's your AMP. For example, my PSU gives off 588 from my 12v rail. 588 divided by 12(from your 12v rail line) and it equals 49, there's my amps, it's 49. If yours have more than one 12v rails, take the total watts it's rated as, subtract ~80W(explained by before) and divide by 12 and there's your COMBINED amps from your multiple 12v rails.Originally Posted by Kanaju
EDIT: Dam you SnOw, you beat me to it, but yours doesn't include multi-rails.
