I get the exact same stutter issues playing BF V on my 2080 ti. No matter what settings I change or reinstalling drivers/game could fix it. And that's on raid 0 Samsungs. For me, I believe it's related to just BF V, as I get no issues in any other games. That and a quick google shows that a lot of people complain about stuttering in this game. I just play through it now unfortunately, but still hold out hope that it gets fixed.
I've tried DX11 and DX12, though with DX12 and DLSS I get much better performance it's just that the stutter is still there. Strange you loose performance.