Another thing I figured is that if you’re using a 5800X, tuning the power and PBO limits helps massively with temperatures and performance.
These are the settings I’ve come up with based on Reddit and my own testing:
BIOS Settings
CPU Core Voltage - AMD Overclocking
Precision Boost Overdrive - Advanced
PBO Limits - Manual
PPT - 120W
TDC - 75A
EDC - 110A
PBO Scalar - Manual 10X
Curve Optimized - Negative All Core 23 (this will vary significantly chip to chip)
CPU Boost Override - Auto
With these settings Cinebench scores are higher than stock (15562 vs 15363 on Cinebench R23). Sustained boosts are higher, averaging 4.7 and 4.75 GHz on the two priority cores during a 90 minute FS2020 session. Temperatures have dropped from the 80s to averaging at 66C for the period with spikes to 78C. AIO coolant temperature averaged at 41C and the ambient temperature was 31C. All cores boosted to 4.85 GHz during the session. All data obtained from HWInfo.
These settings have resulted in overall better performance on flight simulator, significantly reduced microstutter and less main thread limited red in developer mode. To be clear, FPS uplift is minimal to nonexistent, however overall stability and smoothness is noticeably better.
However, ultimately it does seem that there maybe significant performance improvements to be had with better optimization of the simulator by the Dev team. Hope the new upcoming update will have some goodies in terms of performance.