My guess is: 3960X will be better than 2990WX,
and in my experience, plain Windows10Pro (i.e. not for Workstations) is enough up to 128 threads.
We can find some 2990WX's scores of old "Camera" benchmark here: 455FPS by KeyShot8.2 (and 499FPS by KeyShot9.0).
And I've attached my test result of EPYC7402, i.e. Zen2 24core; 457FPS by KeyShot8.2.
EPYC7402 was running at 3.15~3.175GHz in boost mode and Threadripper 3960X will be running around 4.0GHz in boost mode.
So, I expect that 3960X will hit 550FPS or higher by KeyShot8.2 (and a bit more by KeyShot9.x).