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nancy123: Thank you very much for joining the Intel® Graphics communities.
In regard to your comment, I will try to gather additional details about this matter, if I get any updates I will provide all the information on this thread.
Any further questions, please let me know.
Altering clock frequency or voltage may damage or reduce the useful life of the processor and other system components, and it may reduce system stability as well. Product warranties may not apply if the processor is operated beyond its specifications. Here is the processor warranty agreement for further reference: http://download.intel.com/support/processors/sb/warranty_processor_english.pdf
As for the Intel® Core™ i7-7700K Processor thermal spikes, TDP for this processor is 91 W and T(JUNCTION) is 100 C, if the processor is functional within this limit I really don’t see anything wrong at least for the thermals, see here for further information Intel® Core™ i7-7700K Processor (8M Cache, up to 4.50 GHz) Product Specifications
Are you having any specific issue with your processor?