There are two things that are common in many Intel processors, they are designed to save heat, and power by lowering the multiplier and the core voltage of the processor at times that the "power" or extra speed is not required. These CAN be disabled in your BIOS, and in some cases it is recommended (overclocking is one example), but if the processor needs the speed, it will "wake up" and utilize all the speed it has, so its not required that you disable it in the BIOS. If you want to know more, read the links below. You can also ask other specific questions here Here is Intel's C1E and other sleep states documentation Here is Intels EIST documentation. This I did not know, but from a thread below, I give credit to Hans: Other comments like this are welcome, but please be sure of your facts, and NO negative comments please.