[m4rtink]

Sure, it is impressive how much solar power Starlink currently captures, but ISS actually does not get that much - as far as I can tell its about 250 kW maximum even with the new roll-out solar arrays that have been installed quite recently.

So about 2.5 MW of solar potential ? That's indeed quite impressive, but for serious compute a lot of energy needs cooling will eat into that.

[GMoromisato]

Cooling won’t use much energy because it’s mostly radiators and probably some recirculating pumps.

[m4rtink]

I think there could be a non trivial ammount of pumping.

Also building all the radiators and structure from in-space resources could be quite substantial energy investment, same with the energy to put it in the final orbit.