I really appreciate your persistence. I have very high end hardware, overlocked and very stable PC. and yes, BFV is basically the ONLY game (also BF1) that stutters in DX12. BF2042 is definitely fixed and running silky smooth. I believe this is something related to the implementation of DX12 and DXR. The metric I use for evaluation is FRAMETIME (not framerate) so I can definitely confirm the stutters are the result of frames taking long due to some queing going on or some high number of DX draw calls that choke the CPU
Like you, I found that disabling DXR completely eliminates the stuttering in DX12.. good news is, this is fixed in BF2042
