Well, depending on state of charge, supercharging goes up to 250kW. A state of the art PC (4090, Ryzen 9 etc) draws about 850-900 watts on full load. That means such a computer would use 0.004% of available power thus extremely negligible. And the APU (Ryzen-based media system) inside Tesla’s probably uses more around 200-400 watts under full load.