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That'd be the setting mentioned in this post Edit: I totally misread the question, my bad.. When putting the mouse over the option in question, Nvidia control panel shows a description listing the following: Personally, I haven't noticed a difference with it on or off in MT. eventually it still over-allocates and kills all frames.

Booted up my pc, made the change in the nvidia control panel, started dcs.. checked the f10 map for the status of the server, jumped in an apache, waited for the textures etc to load, and it dropped down to 5fps.. DxDiag.txt edit: After a second "session" (restarting the game) I was able to fly with fairly stably, but after 15~20 minutes or so, frames started jittering between 15 and 25fps. When in external (F2) views, frames go back to normal, but in cockpit view (F1) it instantly drops back down to 15~25. When looking at the stats in external view, the vram usage is around 5gb/6gb (less than max) and when in cockpit, it's always 7gb/6gb (more than max) when fps is unstable

I'm using the HTC Vive (1st gen) with an RTX 3070 and the frame drops from F10 back to F1 on MT happen a lot.