750watt PSU

[Kempen17]

i currently have an OCZ ZT 750w power supply. i want to upgrade some stuff but not sure if my PSU will take it or not.

my build currently consits of
dvd drive: liteon
Hdd: western digital 2tb caviar black
gpu: EVGA gtx 560ti
cpu: Intel Core i5 2500
mobo: asus p8z68-v
ram: 8gb corsair 1600 mhz
psu: ocz zt 750w
case: cooler master HAF X
other features: four fans in case (2 LED 2 non LED) 4 cold cathodes

My build after upgrades
dvd drive: liteon
ssd: Corsair force GT 240gb
Hdd: western digital 2tb caviar black
gpu: 2x GTX 580 or 1x 680
cpu: Intel Core i7 3770k
cpu cooler: Corsair h100
mobo: asus p8z68-v
ram: 16gb corsair 1600 mhz
psu: ocz zt 750w
case: cooler master HAF X
other features: four fans in case (2 LED 2 non LED) 4 cold cathodes

so in total, my upgrades are 2 gtx 580's (or 1 gtx 680) 8 more gigs of ram, a 240gb ssd, an intel core i7 3770k, a corsair h100 cooler.
but the question is, will 750 watts be enough for my rig?

also, i will be running tri monitors. although i don't think that makes a power consumption difference.

 

[Azok]

One 680? Yes

Two 580s? No

 

[Kempen17]

One 680? Yes

Two 580s? No

thanks. what about 2 570's instead of going for 2 lower end kepler cards?

 

[Azok]

"For a system using two GeForce GTX 570 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 800 Watt or greater power supply that has a combined +12 Volt continuous current rating of 56 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors." -ko888