It seems that you are reading the cores temperature, you do not need to worry about the cores temperature, but instead you need to pay attention to the CPU temperature itself.
Please check with the motherboard manufacturer for them to provide you monitoring software that can provide CPU temperature instead of cores temperature.
As long as your CPU temperature does not reach above 72.6 degrees Celsius, the processor will be running under thermal specifications.
With Asus thermal radar cpu temp with x.m.p is over 87 ° celsius. Without X.M.P is around 80 ° celsius. In both cases the temps are higher than 72* c.
In this case I would suggest contacting the local support center for warranty options.
If possible test the processor on a 2nd motherboard to see if the processor has the same thermal behavior.
Local support center contact information is here: