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Stronghold digital https://zeiner.com/
own the power plant, use waste coal (glob piles). and have option to sell electricity to the grid if mining is unprofitable
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In today's bear market, obviously the one that has the greatest efficiency (J/TH, ... the amount of electricity consumed per TH/s).
But you pay for that in CapEx (CapEx/TH).
If you are looking solely at J/TH, then the Antminer S19 XP has the best efficiency.
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assuming you're inquiring on miner hardware. this site is handy:
adjust your electricity costs at the bottom of the site
then type ' sha-256 ' in the search box to filter by bitcoin capatible miners
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The best profitability mainly depends on electricity costs! But the highest efficiency probably always the newest antminer I guess?
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TI-86 calculator
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