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The most popular miner right now is the Antminer S9. It consumes 1372 Watts / 14TH.

98 Watts / TH, and the current total Bitcoin hash rate is just under 50,000,000 TH/s. This means that the entire Bitcoin network (all miners) are consuming 4.9 gigawatts.

It's hard to find stats on how much power Las Vegas uses, but NVEnergy reports that North + South Nevada use 7.8 gigawatts, and some other articles estimate Vegas alone at 8GW. So, not quite but definitely close.

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A majority of Las Vegas electricity is generated from fossil fuels in the form of natural gas. A high proportion of bitcoin mining is generated from hydroelectric which is a much cleaner source of electricity. In that these anti crypto articles have a tendency to be misleading.

The Antminer S9 is one of the most efficient miners. ASIC miners from older generations require more Watt per TH, 8 GW might fit.

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