Made for systems with multi-core processors, it is able to reduce energy consumption by moving all processing to just a few of the cores (or even just one) if they are able to handle the load, and putting the other cores into a ‘Parked’ or inactive state. While in this parked state the cores use less energy but are still ready to resume normal use pretty much instantly!

The energy savings when dealing with systems with 2-4 cores will not be too dramatic, however with more cores (Server 2008 supports up to 256 cores!) this could soon add up.