No matter what I do, I can't get nearly acceptable performance due to "Limited by Main Thread"

Hello beautiful simmers,

My PCs specs are,

  • Intel Core i5 12600K
  • MSI MAG Core Liquid 240R V2 AIO Cooler
  • MSI Pro Z690-A DDR4 Wi Fi Motherboard
  • Asus TUF Gaming RTX 5070 Ti 16GB Vanguard SOC
  • Corsair 32GB DDR4 3200 CL16
  • Samsung 1TB 980 Pro SSD
  • Windows 11
  • Display is a TCL 75" MiniLED TV with 3840 x 2160 @120Hz

I am on MSFS 2024 SU2.

I mainly fly airliners like PMDG 777, Fenix A320, iniBuilds A350, FBW A380.

My target is to get “optimized” performance for iniBuilds A350 in iniBuilds OMDB Enhanced scenery at 4K. This is a resource heavy scenario and everything else will more or less be less taxing than the combination of these two.

Refresh rate set to 120Hz, VSync set to ON in NVIDIA App.

I upgraded from 3080 10GB to 5070 Ti 16GB because I was limited by GPU in MSFS 2024 due to former GPU. Upgrading to 16GB doesn’t really help. Default planes are Okayish.

I tried to enable 3x or 4x Framegen via NVIDIA app but I am not sure how to “verify” that 3x or 4x is indeed enabled.

So, iniBuilds A350 and iniBuilds OMDB gives me between 20-30 fps on TAA and no framegen. Maybe 30-35 fps with Framegen 2x but the camera movement is so laggy and jittery even with FSR which gives 50 fps. Even if I choose lowest resolution or set everything to “low”, I see absolutely no effect on fps or frametime which hovers between 30-40 fps. Also, CPU utilization is around 40%, not 100% as suspected.

A lot of people are getting such stable performance in MSFS 2024 but I am absolutely stumped now. Should I change the CPU? Does my motherboard need to change?

Can you wonderful people help?

Greatly appreciated.

Post screenshots of your graphics settings.