The primary goal for MSFS 2024 multi-monitor optimization is Frustum Alignment and Aspect Ratio Correction. When you span the game across three screens, the default camera often treats the side monitors as “extra wide” extensions rather than angled viewports, leading to extreme stretching. This configuration focuses on forcing the correct resolution and disabling the “Lens Distortion” effects that look jarring on multiple flat panels.
Hardware Compatibility & Expectations
- VRAM is Critical: Running triple 1440p displays requires at least 12GB to 16GB of VRAM. If your VRAM is capped, the side monitors will suffer from blurry “low-res” streaming textures.
- Frame Generation (DLSS 3/FSR 3): This is essential for triple-screen setups. Note that Nvidia’s Frame Gen can sometimes struggle with secondary windows, while AMD FSR 3 often provides better stability across spanned “Surround” displays.
- CPU Bottleneck: Multi-monitor setups increase the “Draw Call” count, putting more stress on your CPU’s main thread.
File Location
The UserCfg.opt file location depends on your installation type:
- MS Store:
%LOCALAPPDATA%\Packages\Microsoft.Limitless_8wekyb3d8bbwe\LocalCache\UserCfg.opt - Steam:
%APPDATA%\Microsoft Flight Simulator 2024\UserCfg.opt
Best UserCfg.opt for Multi-Monitor Stability
Open the file with Notepad++ or Notepad. The most important sections for you are {Video} and {Graphics}.
{Video
Adapter "NVIDIA GeForce RTX 4080"
Monitor 0
Windowed 0
FullscreenResolution 7680 1440 ; Set this to your total spanned width/height
Size 7680 1440
RefreshRate 144
}
{Graphics
{PostProcess
Enabled 1
EyeAdaptation 0 ; Prevents "blinding" light changes when looking sideways
ColorGrading 0
Sharpen 1
Fringe 0 ; Set to 0 to remove purple/green edges on side screens
LensDistortion 0 ; CRITICAL: Prevents the "curved" look on flat monitors
Dirt 1
}
}Pro Tip: If your side monitors look “squashed,” ensure your Windows display settings are set to “Extend” rather than “Duplicate.” In MSFS 2024, the best result often comes from using the “Experimental” multi-window feature in-game, which creates separate render windows for the left and right views.
Multi-Monitor Strategy & Calibration
To get the perfect 180-degree field of view without distortion:
- Lateral Rotation: When adding secondary windows in the “Experimental” menu, use -90 and +90 for side monitors positioned at 90-degree angles. If they are angled at 45 degrees, use -45 and +45.
- FOV Matching: Ensure the “Zoom” level is identical across all windows. In the
UserCfg.opt, verify thatSecondaryScalingis set to 1.000000 to avoid mismatched pixel density. - The “Windowed” Trick: If your settings keep resetting, toggle the game to “Windowed” mode, apply your multi-screen layout, and then switch back to “Fullscreen.” This forces the
UserCfg.optto re-read your resolution data.
Key Parameters Analysis
| Parameter | Recommended Value | Impact |
| LensDistortion | 0 | Removes the simulated lens curve, making the horizon line straight across screens. |
| Sharpen | 1 | Counteracts the blur caused by DLSS/FSR upscaling on large display arrays. |
| Fringe | 0 | Removes Chromatic Aberration, which is highly visible on peripheral monitors. |
| PrimaryScaling | 1.000000 | Ensure this is not set to “Dynamic” to prevent resolution drops during flight. |
Troubleshooting & Common Fixes
- Distorted Horizon: This usually means the “Field of View” (FOV) isn’t synchronized. Set your main monitor FOV in-game first, then add the side windows.
- FPS Drop on Side Screens: If your side monitors are laggy, lower the “Offscreen Terrain Pre-Caching” to Ultra. This forces the game to keep the side-view data ready in your RAM/VRAM.
- Black Side Windows: This occurs if you run out of VRAM. Reduce your “Texture Resolution” to Medium; the visual difference is minimal on 1440p, but it saves gigabytes of memory.
Frequently Asked Questions (FAQ)
Should I use Nvidia Surround or the in-game Multi-Window?
In MSFS 2024, the in-game Multi-Window (Experimental) is superior because it allows you to set the specific angle of your side monitors, which fixes the “stretching” issue that Nvidia Surround cannot.
Why does my frame rate cut in half with a second monitor?
Every additional monitor requires a separate “Render Pass.” You are effectively asking your GPU to draw the game twice or three times. Use Frame Generation to bridge this gap.
Can I have different resolutions on different monitors?
Yes, but it is not recommended. The UserCfg.opt will struggle to align the windows, and you will see “seams” between the screens where the cockpits don’t line up.
Conclusion and Expected Results
By manually editing your UserCfg.opt to remove lens distortion and properly aligning your lateral rotations, you are turning MSFS 2024 into a true professional-grade simulator. You can expect a seamless horizon transition across all screens, the removal of unrealistic color fringing in your periphery, and a stabilized frame rate that makes cross-wind landings much easier to judge.