Assuming they're Antminer S9s they consume around 1 kW each, 600 kW is usually a non negligible amount of electricity to have available. But, interestingly, Ic

Assuming they're Antminer S9s they consume around 1 kW each, 600 kW is usually a non negligible amount of electricity to have available. But, interestingly, Iceland also has a lot of artificially lit/heated greenhouses that can be seen from very far away. Those probably take a lot of power as well. Electricity is insanely cheap there because of geothermal generation. Private generation is a thing there as well, IIRC.