This white paper describes the processor architecture that supports 4th Gen AMD EPYC™ processors and future enhancements that enable you to branch out and address a continuously widening universe of workload demands. Our hybrid, multi-chip architecture enables us to decouple innovation paths and deliver consistently innovative, high performance products. The ‘Zen 4’ and ‘Zen 4c’ cores represent a significant advancement from the last generation, with new support for highly complex machine learning and inferencing applications. Our system-on-chip approach helps server vendors to accelerate their designs and get innovative products into customers’ hands quickly. AMD EPYC™ processors are the only x86 server CPUs with an integrated, embedded security processor that is “hardened at the core” to help secure customer data whether in a central data center or distributed across locations at the network edge. Finally, this paper will review some of the design choices that enable no-compromise single-socket servers as well as some of the most powerful two-socket servers on the planet.