You could do some immersion cooling to reduce power usage. Not sure about the S1, but the S7 is still very profitable if you do immersion cooling on it. Althoug

You could do some immersion cooling to reduce power usage. Not sure about the S1, but the S7 is still very profitable if you do immersion cooling on it. Although you're also risking damaging the miner (it might have components that dissolve in your coolant).