Do you know about CPU Halt and Grant Idle states? Almost any modern operating system will enter these states as soon as CPU usage drops below
100%. This isn't some setting in a property page somewhere, it happens automatically whenever CPU usage isn't 100%.This isn't an operating system Standby or Suspend state, where it blanks the screen. It is an instantaneous and effective power reduction mechanism that is instantaneously reversed as soon as CPU is required.
Christian.