Unfortunately, we still don't have core temperatures since AMD hasn't released the necessary information. We only have the temperature sensor chips (nct6775 and it87) in the motherboards. For some reason, AMD is keeping Ryzen core sensor reading information from the public version of the Processor Programming Reference for 17h. AMD, if you see this, can we get it please? I'm afraid of my own OC since I can't know if it's a reasonable temperature or not! I really feel that I shouldn't have to use Windows for this.
Relevant issue posted: