how much power would 2 direct cu2 OC gtx 680. i currently have a 750w and want to add another gtx 680
my specs are
asus maximus v formula
dc2o gtx 680
16gb 1866mhz gskill ram
and 5 led fans
Well it depends if you have a good psu or not
GeForce GTX 680 - On your average system the card requires you to have a 550 Watt power supply unit.
GeForce GTX 680 SLI - On your average system the cards require you to have a 750 Watt power supply unit as minimum.
i have the antec earth watt 750w power supply 80 bronze certified
mmm antecs are a mixed bag. depends on which PSU as they re-badge PSU's from other manufacturers. that said the one you have in particular seems to be fairly decent one. it should work but i wouldn't rule out a higher wattage one if you can swing it in your budget. if you can't i would not worry to much.