how efficient is AM's chips compare to competitors? seem a lot of grumbling about the efficiency.
the already produced equipment is sunk cost. efficiency ensure positive cash flow (BTC in USD minus electricity price) - esp with BTC down quite a bit from the 650 level.
Not very efficient at all... 800GH tubes using 930 watts. Bitmain and SP-Tech use well under 1 watt per GH.