Some what off topic but 517 GH/s? I thought it was more like 400 GH/s stock. Did you modify the boards for overclocking?
BFSB sold them as 400 GH/s full kits, but nearly all of them make 500+ GH/s. My boards are unmodified, I will play around with that when they
brake even equated the loss I made from the actual ASIC all-stars.
Impressive. It makes me think a 28nm die shrink of Bitfury (Bitfury28) could be <0.5 J/GH at the wall (with high efficiency PSU).