Since we all know KNC Neptunes melt down, catch on fire, and try to kill you in your sleep...
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1 x EVGA Supernova G2 1300W + Y cables sufficient for the three Neptune cube.
2x Corsair RM1000 + Y cables sufficient for the four Neptune cube.
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2x EVGA Supernova G2 1300W
6x Y cables
1x controller board without Neptune displey
6x Neptune Cubes
=
4 TH/s Neptune miner at 2500W