All standard computer components require a regulated voltage, then they consume power as a consequence of their operation. The steady voltage is required because the transistors in ICs will break down if voltages go too high, or stop operating if they go too low. Forcing something like an IC to always use the same amount of power, even if it were idle, isn't really possible, because nobody would build it that way.
All standard computer components require a regulated voltage, then they consume power as a consequence of their operation. The steady voltage is required because the transistors in ICs will break down if voltages go too high, or stop operating if they go too low. Forcing something like an IC to always use the same amount of power, even if it were idle, isn't really possible, because nobody would build it that way.