whoa - that is shady. are you running black and red wires for both 12V and GND? Why not follow the colour scheme of red12V and blackGND?

otherwise, nice job - i love the antminers. how difficult was it to 'convert' the PSU, what kind is it? I ordered 2 similar ones (670W) but dont know if the jumper config is the same as on other dell poweredges