After some further testing with my system - G2, 9700k and 2080ti I am getting good performance using the following tweaks and settings in MSFS, as ever YMMV.
I have most traffic set to 50% and also run at the same time as MSFS AIG traffic, Voice attack & FS Realistic.
I don’t know if placebo but FSR seems to be smoother than NIS, using NIS do I need to enable this in NCP?

