Build Advice New PC (Rate this build!) Any recommended changes ?

[King Dranzer]

So you have nothing but pure speculation on a future product based on the 9800X3D's performance. The 9950X will very likely perform better in tasks than the 9950X3D when the cache is doing nothing but holding clocks back compared to the 9950X. Very few, if any, production applications in the use case can take advantage of the main benefit of increased cache, and even in those cases we cannot know by how much until reviews come out. The 9950X will be equal to, or better than a 9950X3D in everything that does not benefit from the 3D cache, and that is the most charitable way of putting it. Worst case for the 9950X vs the upcoming 9950X3D would be cache sensitive work load, and the non-X3D part will probably do nearly as well in those tasks. All we can do is wait for reviews. The OP needs a PC ASAP and the meager gains in very few use cases over the 9950X don't warrant more than a month of waiting IMO.

It won't be held back on Clocks either. So even for Multi-core performance be on par with 9950X if not better.

But I checked back again. And here Both Unreal and Houdini benefit greatly from 3D v-cache as 7950X3D even with lower clock speeds performed better than 7950X. This time the performance gain be even larger as 9950X3D won't be limited on clock speed like 7950X3D was.

And yes those software also benefit with higher core count. So 9950X3D also benefits over 9800X3D in that department.

It obviously is worth the wait.