SpeedStep
Hard Drive Recovery - SpeedStep
SpeedStep refers to a series of dynamic frequency scaling technologies built into some of the Intel processors. SpeedStep allows the clock speed of the processor to be dynamically changed by software. As a result, the processor is able to meet the performance needs while minimizing power consumption and heat dissipation.
Different Versions
V1.1: This version is used by second-generation Pentium III processors. It enables the CPU to switch between high frequency and low frequency modes.
V2.1: This is the enhanced version used in Pentium III-Mobile processors. It is similar to V1.1, but in the low frequency mode the CPU also uses a different voltage than the high frequency mode.
V2.2: This version was designed for Pentium 4-Mobile processors. This allows a 1.8 GHz Pentium 4-M consuming about 30 watts to lower its frequency to 1.2 GHz., thus reducing power consumption to about 20 watts.
V3.1 (EIST): This version is designed for the first and second generation of Pentium M processors, Banias and Dothan cores, used in Centrino platforms. With this, the CPU can vary its frequency between about 40 percent and 100 percent of its base frequency in increments of 100 MHz (for Banias core) or 133 MHz (for Dothan core).
V3.2 (Enhanced EIST): V3.2 is adapted for multi-core processors with unified Level 2 cache.
All major operating systems including Microsoft Windows, Mac OS, Linux, Solaris and BSD kernels offer support to SpeedStep integration.
