Are computer power supply ratings the input or output wattage? - Super User

After looking at some of the draws of the typical desktop computer system I am confused by power supply ratings which seem to be excessive. The big item in a desktop computer, the CPU typically ha

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be quiet! Dark Power Pro 13 1600w ATX 3.0 80 PLUS Titanium PSU Review

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STABILITY: This PSU features 500W of output power, adopts active PFC design with single +12V output rail providing strong and stable power to

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