Windows Server 2008 R2 - Core Parking

A technology enhanced in the core Windows Server 2008 R2 operating system is a power management technology called core parking. Normally, when a multicore server runs, all cores on all processors run at the highest speed possible, regardless of whether the server is being utilized. For organizations that need high capacity during the weekdays when employees are working, that means their systems are effectively idle during evenings and weekends, or more than two thirds of the time, yet consuming power and expending heat. With core parking, servers with the latest processors that recognize core parking protocols will shut down cores on a system when not in use. So, on a 16-core server, if only 2 cores are needed, the other 14 cores are powered off automatically. This dramatically improves power management and decreases the cost of operations of server systems.


Source of Information : Sams - Windows Server 2008 R2 Unleashed