This supplier stick with the principle of Good quality first, Honesty as foundation, it is totally to become belief. Like a rule, they most totally expose the possible of 12nm chips, but in the case of Z15E there are no this sort of applications from Skilled teams. Dan Ives, https://antminer-z15-second-hand21975.techionblog.com/39521173/antminer-z15-420ksol-performance-explained