UPDATE: Make sure the in-game option Bandwidth is set to UNLIMITED under the GENERAL OPTIONS – DATA settings. Also, disable Photogrammetry if experiencing heavy stutters on the ground and in the air even though not flying near any photogrammetry area.
After some dramatic performance drop issues with Sim Update 3 in March 2021, the community around the Microsoft Flight Simulator started to hunt down for all kinds of tweaks to enhance the flying experience. The official known issues section is good to check out frequently for new updates. If you find any performance drops or problems during your flying, please report them to the developers. If you are experiencing slow download speed while downloading the MSFS or its big update files such as Sim Update and World Update, do the following. A loop issue during in-sim downloads can be fixed by force quitting the MSFS installer. The download will resume where left off after relaunching the sim. Before starting to update, make sure the in-game option Bandwidth is set to UNLIMITED under the GENERAL OPTIONS – DATA settings, then close MSFS and do the following.
- In the Windows search bar, type “Delivery Optimisation”.
- Select “Delivery Optimisation advanced settings”.
- Set both Percentage of measured bandwidth limiters to 100%.
- In the Windows search bar, type “Command Prompt”.
- In the menu select “Run as administrator”.
- Type: netsh int tcp set global autotuninglevel=normal
- Press Enter, you should receive an “OK.” message.
- Reboot your computer for this change to take effect.
Here are gathered some of the performance boost tricks I’ve tested, and I think you could also try and see if it helps to gain a bit smoother performance and fewer problems at your own risk. If you realize that no change happens to your performance, always change the settings you made back to default ones. I’m using all the tricks introduced below with everything as described on the Best Graphics Settings Guide as well, and I’m really happy with the overall performance of the MSFS.
- Apply the download speed tricks above this page as it might help performance too.
- Disable both Game Mode and Hardware-Accelerated GPU Scheduling as instructed.
- Set CPU scheduling to Background services (added to the Virtual Memory section).
- Enable more Virtual Memory to prevent unknown crash-to-desktop issues.
- Disable both Hardware Virtualization and HyperThreading as instructed.
- Disable CPU/GPU overclocking, can cause random crash-to-desktop issues.
- Use only the built-in Windows Defender for antivirus protection.
- In NVIDIA Control Panel, for MSFS, set Max Frame Rate to 45 FPS.
- In NVIDIA Control Panel, for MSFS, set Threaded Optimisation to OFF.
- In NVIDIA Control Panel, for MSFS, set Vertical Sync to ON. In-sim MSFS Vsync to OFF.
- Disable all the unneeded in-sim Toolbar icons by unticking them via the gear wheel icon.
- Disable Photogrammetry if experiencing heavy stutters on the ground and in the air.
- After every Update, re-create a different size of Rolling Cache to overwrite the old cache.