At this point, I don’t see an obvious solution. I’ve got 2 thoughts in my head. Neither may be helpful.
1. Your motherboard is tiny and how it sits in the case has the video card hindering the air flow. This is most likely NOT your problem. But it’s not an ideal set-up airflow wise.
2. That’s a massive CPU cooler. If it’s not seated perfectly and with ideal thermal paste applied, it’s weight alone will make it want to pull/sag of of your cpu. Solution? Get the best thermal paste you can. Clean up the cpu and cooler very well. Check out a tutorial on how to apply it (think Tom’s has one. Reapply paste, and double, triple check that the cooler is on there 100% as bestyou can.
If that’s doesn’t work. Go back to the stock cpu cooler...