Temp jump on OCCT

Hello!

I undervolted my CPU recently (the i7 14th gen).

To test stability, I ran a OCCT test CPU+RAM + linpack. I have no errors and everything works fine but I noticed that the temp of my CPU is not very stable.

The CPU temp is in average at 60-65degree, but in reality it jumps from 50-55 to 75-80. Like for few seconds it's around 55, then jumps to 75 then return to 55. I modified the fan curve of my AIO (arktik iii 360), but it remains the same. The power sent the CPU (Vcore) is stable and the frequency of the cores are also OK.

I read online that this temperature fluctuations can be linked to the linpack test, which tests one core then all of them then the next core etc..., so the temperature are not stable due to this. Is that true, or should I worry?

Thanks a lot!