Interesting confirmation here:
https://www.techpowerup.com/303084/a...e-two-chiplets
If you can afford a 7900X-3D or better, then you only get the stacked cache on one of the CCD die.
That's potentially cool, as the non stacked die can boost to the same sort of single thread frequency as the non 3D variant. Or it's a nightmare.
I guess thread scheduling just got more interesting