Hi guys. I am going to be honest, I am not a FS guy. I found this post by googling the exact same problem I am having with my 6900 XT in other games. It will get great FPS then lag for a split second out of no where. I have tried everything. I do not think I am getting bottle necked at all. I have a 5900x, 32GB 3600mhz ram, a gen4 nvme ssd and a 850w Gold PSU.
Any solution? Seems to be a common problem.