Question 9700k high/spiking usage

Feb 27, 2019
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I just built new 9th gen build, currently running a 9700k, Asus strix z390-h, with a rtx 2070. I currently have it clocked at 4.9. An I’ve noticed I’ll get unsteady cpu usage even when just browsing google chrome. It will jump up an down sometimes hitting 40-50. While gaming like apex I’ll go from 40/50% to 90/100% in a split second. My previous build was a 7700k an it did not do this. Temps are great running a h150i pro.

I did read something about the h series strix not having enough power or vram to run the 9700k properly, not sure it that’s true. If someone could help or shed some light that would be awesome