Bitmain will launch its next-generation 7nm ASIC chip, BM1397, which achieves will improve performance, chip area and energy efficiency for mining ...
source https://www.google.com/url?rct=j&sa=t&url=https://www.nextbigfuture.com/2019/03/cryptocurrency-miners-tech-and-which-mining-machines-are-profitable.html&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNEPSWo4XpvuBLLNyrnvSE9kmg0jcQ
