View source for Turbo Boost

Intel introduced Turbo Boost (previously known as "Intel Dynamic Acceleration") in the [[Nehalem]] processor. It allows active cores to be stepped up beyond their usual operating frequency, using cutoffs such as power draw or thermal dissipation. Turbo Boost operates in 133MHz increments on [[Nehalem]], and 100MHz increments on [[Sandy Bridge]]; the Sandy Bridge implementation also uses a more accurate thermal model. Turbo Boost can be used on more than one core at a time; Sandy Bridge typically allows more aggressive Turbo Boosting when multiple cores are active.

"Activity" is a function of the [[ACPI]] Processor State ("[[Power Management|C State]]") of each core; cores in state C0 (Operating) or C1 (Halt) are considered active.

==Sources==
* "[http://www.intel.com/technology/turboboost/ Intel Turbo Boost Technology] at http://www.intel.com
* "[http://download.intel.com/design/processor/applnots/320354.pdf Intel® Turbo Boost Technology in Intel® Core™ Microarchitecture (Nehalem) Based Processors]", Intel White Paper 320354-001 (November 2008)
[[CATEGORY: x86]]
[[CATEGORY: Hardware]]