Hi there, I am on a lower tier (4080 i7 13700) but I think you guys can still answer my question 
I am also trying it with 2D 60Hz 2k monitor DX12 FG HAGS On TAA and TLOD between 150 and 200 and frame rates are fine but when I am popping out the ATC window to a second monitor (so that it does not interfere with my cockpit view) I get stutters and many times also CTD. Is this normal for FG? I am asking because if I run without FG then I don’t have this problem. The same applies to screen tearing - I get it with FG when I pan around the cockpit. Maybe I am applying the wrong settings with regard to Vsync in NCP ?