Bitcoin’s projected difficulty cut would still leave older S19 rigs short at 5-cent power
Summary
A projected 6.5% Bitcoin mining difficulty cut around November 13 could raise hashprice by about 7%, from $31.89 to roughly $34.11 per petahash per day, assuming Bitcoin price, block subsidy and fees remain unchanged. The estimate is provisional until the adjustment completes. The added revenue would not make two older S19 models viable at 5 cents per kilowatt-hour: they would still earn less than their electricity costs. A nominal S21 at 8 cents per kilowatt-hour could barely cover machine power, with about 10 cents daily left before other expenses. Calculations use manufacturer power ratings and exclude cooling, pool fees, labor, repairs and other operating costs.
