AMD may be working on its third 3D V-Cache AM4 CPU after the successful release of the Ryzen 7 5800X3D and more recently the Ryzen 7 5700X3D. Unlike these octa-core chips, the Ryzen 5 5500X3D will be a hex-core design, the first V-Cache CPU of its kind. It won’t be too different from the existing variants. AMD is merely recycling defective 5800X3D/5700X3D dies that still have six working cores and the same amount of L3 cache (96 MB).
Last year, it was rumored that the Ryzen 7 5700X3D would launch alongside the 5500X3D. However, only the former was announced, and the latter was forgotten. The below Tweet from last November claims that the Ryzen 5 5500X3D will feature 6 cores and 12 threads with a boost clock of 4 GHz (3 GHz base clock).
The L3 cache will be the same as the other X3D CPUs consisting of a 64 MB cache die stacked atop the primary hex-core CCD containing 32 MB of LLC. With these specs, the Ryzen 5 5500X3D should perform similarly to the 5700X3D, falling behind only in compute-intensive city-building sims like Civ, Frostpunk, and Skylines.
Source: @harukaze5719.