This message was posted on behalf of Intel Corporation
Thanks for the clarification.
In that case, you should not be worry. Your processor is behaving as expected, 26°C is actually a really good temperature for your unit. Your processor, Intel® Core™ i7-5820K Processor (15M Cache, up to 3.60 GHz) Product Specifications, has a TCASE of 66.8°C and this means that any number under this parameter is completely fine, it will not harm your PC.