AMD Core Performance Boost (CPB) is a dynamic frequency scaling technology implemented by AMD that allows the processor to dynamically adjust and control the processor operating frequency in certain versions of its processors which allows for increased performance when needed while maintaining lower power and thermal parameters during normal operation.
[3] AMD Turbo Core is similar to Intel Turbo Boost, which is another dynamic processor frequency adjustment technology used to increase performance, as well as AMD PowerNow!, which is used to dynamically adjust laptop processor's operating frequencies in order to decrease power consumption (saving battery life), reduce heat, and lower noise.
To decide a processor's clock speed, the processor is stress tested to determine the maximum speed that the processor can run at before the maximum amount of power allowed is reached, which is called thermal design power or TDP.
[4] A parameter called average CPU power (ACP) is used to address this issue.
AMD Turbo Core and similar dynamic processor frequency adjustment technologies take advantage of average power consumed being less than the maximum design limits, allowing frequency (and the accompanying power and heat) to be increased for short periods of time without exceeding design limits.