While many still are trying to get their hands on a ZEN3 based AMD processors with good pricing, ZEn4 of course is already in the works. And chatter is building up. Desktop CPUs AMD's Zen 4 Raphael will be limited to 16 cores with 2 compute units.
Previous rumors have been made about a 24 core model with three computer units, but that seems improbable. Patrick Schur who's been spot on mostly in the past; indicates the fastest proc would get a TDP of up to 170 W. AMD will start its Zen 4 5 nm desktop CPUs Raphael in 2022, these will be PCIe 5.0 and DDR5 compatible. However, the CPUs will migrate to a new LGA1718 AM5 socket due to that new memory and PCIe revision - in an effort to compete with Intel's 24-core Raptor Lake Successor, Alder Lake-S.