https://www.techpowerup.com/298324/amd-confirms-optical-shrink-of-zen-4-to-the-4nm-node-in-its-latest-roadmap AMD in its Ryzen 7000 series launch event shared its near-future CPU architecture roadmap, in which it confirmed that the "Zen 4" microarchitecture, currently on the 5 nm foundry node, will see an optical-shrink to the 4 nm process in the near future. This doesn't necessarily indicate a new-generation CCD (CPU complex die) on 4 nm, it could even be a monolithic mobile SoC on 4 nm, or perhaps even "Zen 4c" (high core-count, low clock-speed, for cloud-compute); but it doesn't rule out the possibility of a 4 nm CCD that the company can use across both its enterprise and client processors.
The last time AMD hyphenated two foundry nodes for a single generation of the "Zen" architecture, was with the original (first-generation) "Zen," which debuted on the 14 nm node, but was optically shrunk and refined on the 12 nm node, with the company designating the evolution as "Zen+." The Ryzen 7000-series desktop processors, as well as the upcoming EPYC "Genoa" server processors, will ship with 5 nm CCDs, with AMD ticking it off in its roadmap. Chronologically placed next to it are "Zen 4" with 3D Vertical Cache (3DV Cache), and the "Zen 4c." The company is planning "Zen 4" with 3DV Cache both for its server- and desktop segments. Further down the roadmap, as we approach 2024, we see the company debut the future "Zen 5" architecture on the same 4 nm node, evolving into 3 nm on certain variants.
I personally thought that Zen 5 would strictly be on 3nm, but that depends on the variant.
