Mining pool F2Pool reported that with electricity costs at $0.08 per 1 kWh, mining bitcoin with ASIC devices with an energy efficiency of less than 23 W/T (watts per terahash) becomes unprofitable.
According to F2Pool's calculations, four types of Antminer devices and one device from Avalon remain profitable at bitcoin prices above $53.1k.
The operation of all other devices has become unprofitable due to the fact that energy costs exceed revenue from mining.
