tatsu wrote:theoretically. now does "core jumping" deliver sufficient cooldown to translate into performance?... that is the question.
Short answer - No.
Long answer - core jumping lowers performance, because each time a process is expulsed from execution and entire cache needs to be emptied as well. Performance hit might be slight, might be substantial, depending on the task at hand.
That being said - desktops are usually not affected by thermals for it to matter. Laptops, to the contarary. The cooling tower on my CPU ( i7 5820 ) weighs as much as an entire laptop. Portables are designed to be used in bursts, because there is only so much cooling to be gotten from such a small format. That is because performance per/watt/clock is essentially the same for desktop and laptop variants for a given family of cpus.