"Zen 4": The AMD 5nm 5.7GHz x86-64 Microprocessor Core.

“Zen 4” is AMD's next generation x86-64 microprocessor core, fabricated in a 5nm FinFET process. Close collaboration between the design team and TSMC enabled an optimized process and excellent process scaling relative to the 7nm process used for “Zen 3” [1]. The 55mm2 core complex (CCX), shown in Fig. 2.1.1, contains 6.5B transistors across eight cores, similar to the 8 core CCX in the previous generation. Each core includes a 1MB private L2 cache, double the previous generation, and the eight cores share a 32MB L3 cache. The design also delivers a process-neutral performance increase over “Zen 3”: instructions per cycle (IPC) is increased, the physical design improves process-neutral frequency and changes are made to drive improved power efficiency maximizing both single-threaded performance and performance per watt in multi-threaded workloads. Incremental improvements to the core micro-architecture provide a 13% IPC improvement over the previous generation on an average of single-threaded desktop applications and the “Zen 4” core can operate at up to 5.7GHz delivering a more than 29% increase generationally in single-threaded performance.