Whatsminer M20. On May 19, 2019, MicroBT officially released the Whatsminer M20 series of Bitcoin mining machines. There are five models of the Whatsminer M20 series, all of which use Samsung's 8nm chips. Whatsminer M20: Hashrate 45T, Power efficiency 48W/T, 10A socket available. Whatsminer M21: Hashrate 28T, Power efficiency 60W/T, 10A socket ...
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