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There's no such thing as normal in that sense because cooling is passive. cpu-z and other programs do not always give proper readings. Intel® Processors have built-in thermal protection. If the processor gets too hot, the built-in protection shuts down the processor.
TCASE is the max Temp so for this specific cpu its 67.4°C
These terms are related to processor temperature for desktop and mobile systems based on Intel® Processors. To allow optimal system operation and long-term reliability, the processor must not exceed the maximum case temperature specifications as defined by the applicable thermal profile.
Tcase is the temperature measurement using a thermocouple embedded in the center of the heat spreader. This initial measurement is done at the factory. Post-manufacturing, Tcase is calibrated by the BIOS, through a reading delivered by a diode between and below the cores.
Tjunction is synonymous with core temperatures, and calculated based on the output from the Digital Thermal Sensor (DTS) using the formula Tjunction = (Tjunction Max – DTS output).
Intel provides a diode between and below the cores with a reading calibrated by the BIOS. This reading can vary greatly between BIOS versions and BIOS vendors.
Below are links to documents that address overheating and prevention of overheating.