Knc promised 400Gh/s and delivered closer to 600Gh/s for their Jupiter machines.
So promising 3000Gh/s but probably will be closer to 4000Gh/s
4000gh/s at 0.7watts/Gh = 2800watts puts you into the realm of professional rack mounted modular power supplies such as
http://www.meanwell.co.uk/rcp-1000-12.html