Looking close at the min motherboard temps and jump upward under load and the cpu core and cpu temps both pretty low and then jump upward under load, I would say you have a 'dinky' cpu hsf assembly and little case air-flow.
I know would get a better cpu cooler and get some case air-flow. But that is me and what I actually did when having the numbers you have right now. Did it back when I had similar setup to yours years ago.
What you will do is simply up to you. You did not even know temps might be an issue to begin with as I think I remember you saying so back in one of your first posts. Probably been running hotter than I prefer and has done so for a good while.