When AMD first announced the Ryzen 7000 processors with 3D V-Cache, we noted that the boost clocks on the Ryzen 9 7900X3D and Ryzen 9 7950X3D were the same as their non-X3D siblings. It turned out that this is possible because only one of the two CCDs under the IHS actually gets 3D V-Cache applied; the other one is free to boost to the full

Source: Hot Hardware – ASUS BIOS Update Gives Users Fine Grain Control Over CCDs On Ryzen 7000X3D CPUs