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Power Supply efficiency

Last response: in Systems
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March 26, 2013 9:37:52 PM

if you have a 500w psu that is rated 80% efficient. if the 12v needs to draw 100w, that means it needs to pull 120 or 125? to actually get 100w , because of heat dissipation?
a b ) Power supply
March 26, 2013 10:13:50 PM

There is no standard way that maufacturers rate their psu's

But reputable brands are rating the output amperages , and that with a little bit of math tells you the wattage

Draw from the wall would be higher due to heat losses
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