https://wccftech.com/amd-adds-further-zen-4-cpu-support-in-linux-patches-enables-rddr5-lrddr5-for-epyc-cpu-with-up-to-12-channels/

AMD is rolling out the first enablement patches of their next-generation EPYC Zen 4 CPUs and the new features incorporated within them for the Linux OS.

While AMD still isn't finished with Zen 3 on both client and server platforms, AMD's Linux team is already rolling out the initial patches for Zen 4 support in the Linux OS. As reported by Phoronix, the latest patches include support for AMD's next-generation EPYC server chips that will offer 12-channel memory support.