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.