How big a power supply?

[shootshutter]

Hello,
I was wondering how large a power supply I would need for this build. I am guessing a 1600w, but Im not sure that is big enough.
The specs are as follows:
2x Intel Xeon E5-2690
1x EVGA Classified SR-X 270-SE-W888-KR LGA 2011
12x 8 gig RAM
2x GTX 690's in SLI
These are just the main components. It will also be watercooled with a koolance system. Thank you.

 

[AMD Radeon]

2x 850W-1000W gold/platinum?

some cases has 2 slot for PSU

personally i will get single corsair 1200W platinum
http://pcpartpicker.com/part/corsair-power-supply-ax1200i

 

[shootshutter]

Would 1200 be enough with all of that plus 8x 2TB harddrives with 2 ssds and everything else necessary? I was thinking about a EVGA SuperNOVA NEX1500.

 

[AMD Radeon]

afaik, single 3930k + 2x 670 + all peripheral = 550W

 

[shootshutter]

Aright, thank you.

 

[shootshutter]

Best answer selected by shootshutter.