AMD's first pre-production version of its future Zen 4 CPUs appears in a MilkyWay@Home spec sheet. This additional data includes the CPU family, model, and stepping name. Furthermore, other parameters, like as the number of cores and cache sizes, imply that Zen 4 is nearing completion.

This specific chip, returns as a Stepping 1 revision, indicating that it is one of AMD's earliest production versions employing the Zen 4 architecture that we have seen, implying that it is a pre-production model that is not yet ready for the general market. Notably the cache, is specced at 1024KB capacity. Obviously, this is the L2 cache, as the latest Zen 2 and Zen 3 chips all have L3 cache capacities more than 1MB. However, for the L2, this is a significant improvement over AMD's existing Zen 3 processors, such as the Ryzen 9 5950X, which has just 512KB. The core count is labeled as processing units by MilkyWay@Home, therefore we assume it covers the thread count of the whole CPU. This Zen 4 chip would be an 8-core pre-production prototype with SMT enabled if this is correct.

Looks like Raphael got it's production model ID (the previous one was 96), probably stepping RPL-B1.
AMD Eng Sample: 100-000000514-03_N
AuthenticAMD Family 25 Model 97 Stepping 1 / A60F11
 

AMD's Zen 4 architecture is expected to debut in the second half of 2022 as the Ryzen 7000. These new processors will be the first to run on AMD's brand new LGA AM5 socket, which includes PCIe Gen 5 capability. Raphael (zZEN4) will be built on TSMC's new N5 process (5nm). Clock speeds look to be increasing significantly as well, with boost frequencies projected to exceed 5GHz. A recent AMD demo showed a Zen 4 CPU running at little more than 5GHz on all cores while playing Halo Infinite.

Ryzen Series 7000 (Zen 4) CPUs Enter Pre-Production