Here is it: testresults - Pastebin.com
Edit: I heard about people delidding their 6700K CPUs to find bad applied thermal compound. I prefer official solution from Intel. What would you offer for my case?
Yes there is issue. Minimal clocking requires too high voltage for stability. Example - i can't have 4.5GHz stable and 4.4GHz requires 1.4V. This is high compared to other results of same CPU.
I did not found another case where a core have significant higher temperature than other cores.
Temperature of 48C in idle is insane, however cooling works as seen on the other cores.
Do you think my system is normal with 48C @ Core VID 0.755v ?
Yes, it is normal.
See here One core always runs much hotter than others? [Solved] - Intel i7 - CPUs (last post), I am pretty sure that this will give you a better understating.
The content on the above site is not controlled by Intel. This information is offered for your convenience and should not be viewed as an endorsement by Intel for the merchants or services offered there.