Hi - While it is a 750w unit, the +12v rail(s) output of 50 +12v amps is typical of a good quality
650w PSU. CPU, GPU, HDD's, etc all draw their current from the +12v rail(s). But, unless
you are SLI/CF two high end GPU's you have plenty of +12v amps available.
Contrary to a statement above, they're are a lot of PSU brands that do trick, exaggerate,
and outright lie about their power specs, protection features, and more.