With SU5 being written for XBox which has AMDs version of resizable bar, direct access for the GPU to RAM in large blocks (or something), I wondered if the closed-case of resizable bar not helping, might be reopened.
I updated card bios and mobo bios. Precision X1 shows resize bar enabled, so the system is good to go.
MSFS doesn’t support RB, or rather, it’s not on the NVidia whitelist of games. However there’s a published way to modify the driver profile to enable it using NVidia profile inspector. That’s what I did.
I booted up with the default settings, no RB, with multiplayer off, clear weather, xcub at Meigs field, looking north, in cockpit, engine and avionics off…just spawned in. Identical situation with RB off and on, after relaunching the game.
I’m not really sure what you are trying to accomplish with this.
From my experiece a difference in performance that tiny is hard to test and recreate reliably. So this all might be a placebo effect. Also a difference of 1.3 fps is pretty irrelevant in every day life. And it is especially irrelevant when you are already running close to 60fps since you won’t be able to notice a difference above 40 fps anyway.