NVIDIA have released a patch (466.11) to fix the stuttering issues experienced in Supreme Commander:
[Supreme Commander/Supreme Commander 2]: The games experience low FPS. [3231218/3230880]
After you update to the 466.11 driver you should be able to disable the
Nvidia fix mod and re-enable the
NVIDIA Display Container LS service if you also disabled that service during your troubleshooting.
We would love to hear from you in this thread if this fixes the problem for you!
However, in my experience I still encounter some issues. I have narrowed it down to my dual monitor setup. Note, I do not play SupCom dual screened but rather I just have my desktop/discord on the second monitor. If I pull the monitor cable out of my second monitor during the game the stuttering disappears. I'd like to hear from other people with multiple monitors to see if they experience similar issues. The easiest way to notice it is to zoom in and out quick and repetitively whilst swinging your mouse cursor rapidly left and right with air units on screen.
Refer here to the original pinned Nvidia driver performance problem thread: https://forum.faforever.com/topic/779/nvidia-driver-performance-problem/