Why the performance difference in MSFS Multi Monitor vs. NVIDIA Surround?

User Support Hub Hardware & Peripherals
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I finally have tried out the multi monitor support provide by SU10 and really like the quality and “non stretched” look. I have 3x1080p 24" 144 refresh rate monitors connected and chose 1080p as the resolution within MSFS with DLSS enabled on my RTX 2080 card. I seem to be getting FPS rates of 15 - 29 out of my home airport.

When I switch to NVIDIA Surround at 5760 x 1080 with the same DLSS enabled triple monitor setup I see FPS rates of 45-55.

Just wondering why the big difference between running 3 1920 x 1080 monitors in MSFS multi monitor vs. the 5760 x 1080 in NVIDIA Surround? I would have expected them to provide similar FPS rates.

I really like the quality without the stretching but not sure it’s worth the FPS hit.

Thanks in advance for any insight.

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In simple terms with surround Nvidia is effectively rendering 2 scenes (1 + 2 halves) but for the unstretched solution it must render 3 so a lot more calculus involved. I presume the gpu’s architecture simply struggles with any more than the 2 that it already must for VR … There are also cpu considerations and as most folk are pushing their limits already that can only mean a hit to performance too. Of course most gpus can do multiple screens but rendering 2D and rendering 3D are worlds apart in terms of necessary compute power and latency.

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It’s three detailed screens rather than one big stretch.

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Created by that bloke Mr Al Gorithm again … he certainly gets about.

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