different processors will have different operating voltages and power consumption based on clock and work load and user defined voltage. One that is being used at 100% is much higher than one that is in idle.
I think you don't know what you are asking. I'm not trying to be rude but if you don't understand that basics of electricity your question and answer is meaningless. Also a CPU is not the same as a 'computer system' and different CPUs and systems will have different power specifications and draws.