That's just a bit different to Intel Turbo Boost which has been widely deployed for a while. When fewer cores are needed it will increase clock speed on a small

That's just a bit different to Intel Turbo Boost which has been widely deployed for a while. When fewer cores are needed it will increase clock speed on a small number of cores if there is work to do. Some BIOSes have settings to completely disable a bunch of cores to enable more turbo boosting. This isn't as sophisticated in thermal as what you outlined, but it saves on cache coherence.