Hello nicfast,
Thank you for joining the Intel communities.
That temperature with this processor is fine, this processor can work under normal use at
74.04°C as you can see here:
http://ark.intel.com/products/80807/Intel-Core-i7-4790K-Processor-8M-Cache-up-to-4_40-GHz Intel® Core™ i7-4790K Processor (8M Cache, up to 4.40 GHz) Specifications
See T-case.
If the temperature is above 80°C then you will have over heating problems but this temperature is fine, also you can run the https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-Tool-64-bit- Intel® Processor Diagnostic Tool this tool will tell you if there is any issue with your processor.
It will be a good idea to have the latest BIOS version for your motherboard and make sure you are not overclocking to avoid any overheating issues.
Usually the K processor overheats more than any other processor but don't worry about the temperature you see because it is fine
Regards,
Ivan
