CPU core runs at 20c hotter than others

EDDMarvelous

Prominent
May 27, 2017
1
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510
Premise: im a new pc builder so i dont have much knowledge in that matter so forgive me
I was having my daily gaming session with msi afterburner on to monitor fps and how fantasmagorically good my machine was running (for my expectations, at least), then i notice "CPU 80C 50%", i was kinda scared, since i have a noctua nh-d15 on a stock 7700k i know these are little heaters, but didnt expect 80c with such cooler, when i was done i checked HWINFO, and it appears like only 1 core out of 4 runs 20c hotter, the rest is at 60c during load, now its not 1 fixed core, but a random one and it switches every so often, is this normal? am i worrying too much?