[Denter]

Разобрался... по сути пропуск тактов и снижение частоты - одно и то же.

Wikipedia (Links)

Dynamic_frequency_scaling

Цитаты:
Dynamic frequency scaling (also known as CPU throttling) is a technique in computer architecture whereby the frequency of a microprocessor can be automatically adjusted "on the fly," either to conserve power or to reduce the amount of heat generated by the chip.
И ниже:
Dynamic frequency scaling reduces the number of instructions a processor can issue in a given amount of time, thus reducing performance.
В общем - интересная тема, буду дальше копать, стало интересно.