Aporte original por: Dan ,
Good Question! Sorry to say Intel's chips don't currently allow one to shut down a given core or two. A different kind of processor will soon be out called a '''big-LITTLE''' In this design a less powerful core runs all of the time but the bigger more powerful cores go to deep sleep mode until the little core tells them to wake. Here's a good writeup [http://www.arm.com/products/processors/technologies/biglittleprocessing.php|ARM big-LITTLE Processing]. Currently its slated for smartphones. But others are also working on similar architectures for desktop & server CPU designs. Even still you won't be able to control it the OS & the Apps will do the work for you.