> superconducting computer can still beat a conventional computer in terms of ops/Watt, even when the power consumption of the cooling equipment is included Bu

> superconducting computer can still beat a conventional computer in terms of ops/Watt, even when the power consumption of the cooling equipment is included But likely not when the energy cost of manufacturing the cryocooler (which has a limited working life) is included. If you count dollars instead of joules the answer is a definite "no". The manufacturing cost per joule of the cryocooler, amortized over its usable life, far exceeds the value of the energy saved.