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Throttling is a thermal protection to keep your processor up and running when temperature is too high. When talking about throttling, you have to take into account the Tjunction Max specified for your processor. You can find it on the following link:
Tjunction Max is the maximum temperature the cores can reach before thermal throttling activates and when a core exceeds the set throttle temperature, it will start to reduce power to bring the temperature back below that point. Now, it is worth mentioning that the throttle temperature can vary by processor and BIOS settings, too.
I hope you find this information useful.