I have a similar problem with my 7750.

Downloaded Intel Extreme Tuning Utility from intel website.

https://www.intel.com/content/www/us/en/download/17881/29183/intel-extreme-tuning-utility-intel-xtu.html? 

This gives lots of details, especially about the power settings which I found to be set very high so that even with moderate loads the processor cores were reaching T-junction temperature of 100degC and the processor was Thermal Throttling almost constantly. The BIOS power settings are PL1 75W PL2 135W. Using this tool I have been able to reduce the settings so that the processor cores do not reach the 100degC but run at a more acceptable level of 80-90deg without losing too much power and the system now more safely and less stressfully power throttles

The Intel site also has quite a lot of information about their recommended power and temperature settings for individual processors. I found the details for my chip at

 https://ark.intel.com/content/www/us/en/ark/products/201897/intel-core-i710850h-processor-12m-cache-up-to-5-10-ghz.html

I am in no way trying to overclock my processor but I found lots of info at

https://www.intel.co.uk/content/www/uk/en/gaming/resources/overclocking-xtu-guide.html

I have posted to this site but it is as yet  unresolved

 See under "Precision 7750 power levels"