Just saw this topic as I have been banging my head against the wall with my stuttering issues. Go ahead and throw my name on the heap with same issues. My setup:
5800x / 3080ti / 64GB RAM / Reverb G2
I have spent lots of money upgrading my system trying fix this issue (damn near brand new system now) and I have finally landed on what appears to be the culprit - VRAM. All of the issues everyone speaks of here are identical - I wanted to add to it to try and maybe assist:
When my VRAM spikes and my frames go to crap:
-My GPU power goes from 350W to 200-230W.
-My GPU usage goes from 60% to 99%.
This happens in the Apache and on Syria, but last night, it happened on the LSO stand in caucuses. After sitting there for 5 minutes, the graphics reset, the power increased, and the frames went back to 45+.
1. Load The second instant action mission for AH64 in Syria - Hot start on the ramp.
2. From there on, complete stuttering.
3. I am using OpenXR, my settings are mostly low, save cockpit textures being high. Have tried it with shadows off, clouds low.
it seems as if the system is using the power for something else and DCS gets put on the back burner, goes to 15 frames. I alt tab out, mess around for a few minutes, all of the sudden it wakes up and goes “oh, you need power? Here you go”. Power comes back, so do the frames.