This can explain a lot
Samsung Strikes Deal to Supply ASIC Chips to Bitmain
https://bitsonline.com/samsung-deal-asic-chips-bitmain/
Rushing out old stuff before selling new Antminer with Samsung chips inside
Samsung Strikes Deal to Supply ASIC Chips to Bitmain
https://bitsonline.com/samsung-deal-asic-chips-bitmain/
Rushing out old stuff before selling new Antminer with Samsung chips inside
I hope this is true. This means no new manufacturer
U want more difficulty?