Unlike the 7800X3D, which has a single CCD with 8 cores + the 3D V-cache, the 7900 X3D has dual CCDs of 6 + 6 cores, where the 3D V-cache is on only one CCD. This leads to performance loss in games compared to the 7800X3D because games have access to only to 6 cores that have the 3D V-cache.
