A power management technology used in Intel’s Mobile Pentium processors. This utility allows software to change the frequency settings and core voltage of the processor depending upon the currently-running applications. Windows XP supports this feature natively, while older versions needed special drivers to enable it. Linux distros as well as Mac OS X also support SpeedStep. Enhanced SpeedStep is a more feature-rich version of the original technology; it enables up to five variations in speed and voltage settings, as opposed to SpeedStep’s low power mode and maximum power mode.