Although during Computex 2022, AMD reiterated that it will fully transition to the new Zen 4 / AM5 platform. But AM4 will obviously support many users for the foreseeable future. Over the weekend, @Greymon55 took to Twitter, citing revelations from CPU dealers, that AMD may have plans to decentralize Ryzen Zen4 to the AM4 platform.
Given that Zen 4 Ryzen desktop/Epyc server processors have all been upgraded to AM5 / DDR5 / PCIe 5.0 platforms, this means that Zen 4 / AM4 chips in transit will switch to DDR4 Memory Controllers (IMC).
TechPowerUp then added that the IO chiplets for Zen 4 / AM4 processors should also be downgraded to the PCIe 4.0 bus.
As for why this is done, it is clear that the Ryzen 7000 series desktop CPUs are the first to focus on high-end. The 13th-generation Core on the competitor Intel’s side has retained support for DDR4, so AMD does not want to give up all the mid-level and entry-level markets.
In fact, AMD’s Robert Hallock revealed in an interview that the dual-platform coexistence of AM4/AM5, and the existing platform may usher in a new CPU SKU.
If so, we can expect AMD to bring 8C / 16T Zen 4 desktop CPU new products to the AM4 platform at the right time.