So since Dildon Musk was complaining about energy efficiency and asking for more green energy to supply. What are your substitute ideas for power supply?

( for big mining systems) So i was thinking using the heat from mining which is around 70-80 C. With the system of water cooling using good thermal conductive heat exchangers we could possibly supply with a good turbine to generate elecricity around 3-4 MW. I know the absurd amount of graphic cards will be needed to supply the heat to the exchanger, but with a good steam boiler system powered by biomass we could potentially use the excess heat as economizer to reduce the input of biomass. The circulation of water steam through the turbine and condensation system plus any leakage of water could be resupplied from the cooling system for mining process. Globally i think it would be very eff. since we got production of el. energy, biomass waste as fuel for boiler system, low amount of water losses if the system has a good condensation return and cooled mining system. Make up water for system would be used for cooling of mining system and as feedwater also for the boiler.
i am just very high atm and thinking alot of shit. Sorry for bad english