Question Weird 10c difference between 'package id' temp and core temps after cpu cooler upgrade ?

May 25, 2023
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Hiya everyone. I recently replaced my stock cooler with a good aftermarket cooler. It is a great component, and post-install I noticed a drop of ~10c on all cores on average workload..

HOWEVER the sensor for 'package id' which as I understand it is a sort of generalized temp, is now reading 10c hotter than the core temps on average. Or to put it another way, it is still reading the same temps I was getting pre-upgrade. Before when I was running stock cooler 'package id' would reliably show the hottest temp out of all the cores. So why now, after replacing the cooler, is it showing a temp 10c higher than the cores? Could this maybe be related to application of thermal paste? I'm quite sure I applied it right though, and I used MX-4 a high quality paste..

Should I just ignore it? Try to reapply paste? This really has me stumped, I cannot fathom why package id would be reporting temps higher than the cores themselves... Intel 'package id' spec says it is a 'weighted average' of all the cores... But since all cores are nowhere near 39c right now that cannot be true.. I don't understand why would simply upgrading a cooler cause this to happen? Ineresting to note once it passes ~45c it starts to act properly, as you can see in below image, max temps are all within 2c of each other..

Example here: temps are current, min, max.
RhhV35s.png