Ryzen 9 9950X3D has 64MB of additional VCache, but it was added on only one of the CCD.
https://www.servethehome.com/amd-ryzen-9950x-review/ryzen-9-9950x3d-lstopo/
(that's not the case anymore in 9950X3D2 has 64MB in both CCD according to https://www.theregister.com/2026/03/26/amd_crams_208mb_of_cache/)
Cores are identical, only the L3 is different. We could expose that as a CPUkind with an info attr L3CacheSize=xyz but it's not even easy to detect in the general case. Also, not sure which part should be considered more energy-efficient.
Ryzen 9 9950X3D has 64MB of additional VCache, but it was added on only one of the CCD.
https://www.servethehome.com/amd-ryzen-9950x-review/ryzen-9-9950x3d-lstopo/
(that's not the case anymore in 9950X3D2 has 64MB in both CCD according to https://www.theregister.com/2026/03/26/amd_crams_208mb_of_cache/)
Cores are identical, only the L3 is different. We could expose that as a CPUkind with an info attr L3CacheSize=xyz but it's not even easy to detect in the general case. Also, not sure which part should be considered more energy-efficient.