On my setup I get a lot stuttering with TLOD pass 150 depending on where I fly. Places like KATL I have to keep it around 100-120 to get a playable experience. Adding in AI traffic adds more burden to my CPU.
Nearly all of my settings are set to Ultra except the LOD settings.
My Specs are on my profile. The highest VRAM usage I have seen so far is 15.2gb.