Unless you’re getting 10 fps (yes slight exaggeration) i don’t think anything is completely wrong. At the moment the approach phase at medium/large airports especially in glass cockpits are going to give a large reduction in frame rates.
If you were complaining before Jan/Feb then i would agree you have an issue but at the moment 33fps and fluctuations to the mid twenties depending on whats going on with the approach and whats in view (weather/Traffic etc) is going to give that performance regardless of what graphics card is being used.
MOST IMPORTANTLY … Skip Talbot mentioned that the Midway screenshot in his post showing everything playing nice was BEFORE Asobo borked the sim performance with both the UK World update and the immediate Sim update after that. The sim has not fully recovered since then with performance deg at the aforementioned places.
Its not that im trying to be unhelpful. but you have to be realistic about where this sim is at presently and the capabilities and configuration of your entire setup. Not just the fact that you have a 5900x and a RTX 3090 and you expect the sim to be smooth as silk at all times.
From your cinebench single thread score i can tell that your system isn’t quite fully optimized however from the looks of it you seem to be getting decent performance from the sim.
If you want better performance you will have to change your focus and start to optimize things that are limiting.
What does your bios settings look like? Do you understand what some of the settings do in terms of affecting performance ?
Do you have standard or Advanced PBO enabled and what are the settings? What is your cpu and Gpu cooling situation? Have they been monitored under load ? What are the peak single core frequencies and temps under load ?
How does your system compare to others with the same hardware in other benchmarks (Not userbenchmark …that “benchmark” is a joke) 3dmark scores cinebench scores (well we know that you’re a little under on that one) etc. 1547 single core does not appear to be the standard 5900x cinebench r23 score (For example… mine is 1623)
I also strongly recommend not installing Geforce experience. Unless you are specifically using a feature within that program (filters etc) It “analyses and changes settings” . I prefer having the stock driver install and changing my own settings as needed.