Bitmain just released 64 Th at 2200 watts shipped in 3 days after payment. Once again, Bitmain is on a major cash grab. Diff jumps are going vertical. By today's metrics this offering gets you ROI by halvening. But...no way that holds. These will be 16 months minimum ROI. Bitmain is at it again. wait for newbs to go broke, then by their gear. That's what I've done the last three cycles. NEVER buy these hype/cycle peaks. People laughed when I predicted that you could buy S9I 14 th for $200.00. I bought 100's of them from $369.00 down to $225.00. My new prediction....wait and buy S17's for $500.00 new in the box post halvening. You heard it here first. $10,000,00 BTC will be the new $3,000.00 BTC.