Just a quick ? about cpu temperatures

[nufc179999]

Hi all i have a i7-7700k running at 5GHz & running at 1.344v. Running a AIDA64 system stability test what's the main temperature should i be looking at the CPU says it's running at around 75c CPU Core 1 at 80-85c. Cores 2,3,4 are running the same as the CPU.
Should i just be monitoring the CPU not the Cores temperatures

[url=https://ibb.co/1ZKMbNw][/URL]