The regular Ryzen 9 7950X3D only has 128 MB
The Ryzen 9 7950X3D processor, like all other X3D models, has an additional 64 MB V-Cache memory chip. But one lucky guy in China got his hands on a copy somewhere that seems to be equipped with 128 MB of such cache memory!
At least that's what the software indicates. More precisely, it detects the presence of 192 MB of L3 cache. 64 MB of which — This is the processor's own cache memory: 32 MB for each chiplet. Another 64 MB is provided by one V-Cache memory crystal in the regular Ryzen 9 7950X3D. This instance seems to have two such crystals, that is, one on each chiplet. As a result, we have the same 192 MB of L3 cache memory in total.
It is likely that this is a software detection error, but it is not very clear where it can come from if we are talking about a processor that is not new. In addition, you can recall that last year the authors of Gamers Nexus visited the AMD laboratory and saw engineering samples of processors with two V-Cache crystals there. Perhaps a user from China just purchased such an engineering sample.
Ryzen 9 7950X3D with two V-Cache chips is unlikely to be seen, but in the Ryzen 9000 line, AMD could well increase the memory capacity of the X3D models.