After persistent rumors refused to recede, AMD steps in with a clear explanation why dual-CCD V-Cache doesn't exist.
Based on AMD's Zen 4 architecture, the Ryzen 7 7800X3D is an 8-core/16-thread chip with a 4.2GHz base clock, up to a 5GHz boost clock, 8MB of L2 cache, and 96MB of L3 cache. In comparison ...
MSI 'X3D Gaming Mode' feature: faster gaming perf with single, dual-CCD Ryzen 3D V-Cache ... 7 9800X3D tuned at 5.6GHz all-core is 35% faster than the 7800X3D at stock, scores a huge 25,000 ...
With single-core clock speeds of up to 6GHz (6.2GHz on the 14900KS), it does hold its own in most titles, even as the 9800XD (and its predecessor, the 7800X3D) edges it out in most benchmarks.