In the 5800X3D vs. 5950X comparison thread, we also did a 5800X3D SMT vs. WithoutSMT comparison, if you are interested.
https://forums.flightsimulator.com/t/fps-difference-verification-between-amd-5950x-and-5800x3d-at-haneda-airport-rjtt-34l-straight-out-flight/531349/25?u=kanadenyan