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| Design firm | Intel |
|---|---|
| Introduced | Q1 2005[1] |
| Type | Dynamic frequency scaling |
Enhanced SpeedStep is a series of dynamic frequency scaling technologies (codenamed Geyserville[2] and including SpeedStep, SpeedStep II, and SpeedStep III) built into some Intel's microprocessors that allow the clock speed of the processor to be dynamically changed (to different P-states) by software. This allows the processor to meet the instantaneous performance needs of the operation being performed, while minimizing power draw and heat generation. EIST (SpeedStep III) was introduced in several Prescott 6 series in the first quarter of 2005, namely the Pentium 4 660.[1] Intel Speed Shift Technology (SST) was introduced in Intel Skylake Processor.[3]
Enhanced Intel SpeedStep Technology is sometimes abbreviated as EIST. Intel's trademark of "Intel SpeedStep" was cancelled due to the trademark being invalidated in 2012.[4]
- ^ a b "Intel Pentium 4 Processor 660 Supporting HT Technology". ark.intel.com. Intel. 2005. Retrieved 2016-03-17.
- ^ Larabel, Michael (February 16, 2006), Intel EIST SpeedStep, Phoronix Media, retrieved 2010-08-09
- ^ Howse, Brett. "Examining Intel's New Speed Shift Tech on Skylake: More Responsive Processors". anandtech.com. Retrieved 2020-06-26.
- ^ "Trademark Status & Document Retrieval". tsdr.uspto.gov. Retrieved 2020-04-26.
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