You must have a hash rate of approximately 45 MH / s per card, this is because it would consume 470W of electricity at its maximum power. Mining 1 Ether would consume around 14,570 W of electricity per hour .15 Oca 2018
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The Energy Requirements of Ethereum Mining Currently, Ethereum mining uses up around 44.5 TWh of energy every year , which comes in at just half that of Bitcoin. Of course, this is still a huge amount of energy.
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