Thats nothing to do with power. Thats the CPU's function. The motherboard/system is powered by a 24pin connector and the CPU by a 4 pin
o ic... but then that leads me to a different question. If the system bus has nothing to do with power (its data transfer I'm assuming) then how could it be that the ram cpu gpu and whatever else synchronizes itself with the system bus. It doesn't make sense that things synchronize themselves to something that doesn't receive or produce power.