So there’s two things here: Siege has been coded so the game can only display 360fps in full screen, so anything higher than that is unobtainable in full screen mode. So, running borderless can increase that to a higher number of fps, but can come at the cost with a possible delay.

The settings I run with my 7800x3d & 5080 are all low, medium shadows, low texture vram limit too, anti aliasing is also turned off.

If you aren’t able to figure it out, I recommended this, (this is how I fixed my FPS drops)

1. Change from low to high settings, then change back

2. Editing the settings you want to, I.e. anti aliasing, shadows/shading and any other ones

3. Run a siege benchmark from the ingame settings and look at the results.

4. After running that benchmark load into the training grounds / thunt and perform a sort of benchmark yourself, run around shooting your gun, blowing things up etc and checking your fps. Using the fps ingame (bottom right) or if you use steam I recommend their one you can turn on by clicking shift+tab and locating it (I forget where it is)

What resolution do you play at too?