Sudden Main Thread Limitation out of nothing

Hey there…

System: 12700k (stable OC), RTX 3080ti (stable undervolted), latest drivers
HAGS on, Game Mode off, DX 12, TAA 100%, High end settings 4k

Running just fine with 30-60 fps, GPU and mainthread limited green/yellow indicators, stable game

After around 45-60 minutes OUT OF NOWHERE (no app started, nothing changed) suddenly FPS drop to below 20 and CPU indicator goes red. I flew this route often before, should have nothing to do with scenery.

What is this? Any new hints out of the community?

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10 posts were merged into an existing topic: What the heck happened to the FPS in SU11