“Zen 5”: The AMD High-Performance 4nm x86-64 Microprocessor Core
Teja Singh, Oliver Spence, Sundar Rangarajan, Shane Southard, Carson Henrion, Alex Schaefer, Brett C. Johnson, Sarah Bartaszewicz Tower, Kathy Hoover, Deepesh John, Ted Antoniadis, Shravan Lakshman, Vibhor Mittal, Brian Kasprzyk, Ross McCoy, Kurt Mohlman, Anitha Mohan, Hon-Hin Wong, Daryl Lieu, Russell Schreiber · 2025
Codenamed “Zen 5,” AMD's next-generation, energy-efficient high-performance x86 core targets a wide array of client, server, and embedded markets. Fabricated in TSMC's 4nm FinFET process, the 55mm2 core complex (CCX), shown in Fig. 2.1.1., contains 8.6B transistors across eight cores, each with a 1MB private L2 cache and a shared 32MB L3 cache. The “Zen 5” implementation supports configurable FP256 and FP512 data paths. The “Zen 5” family includes a “Zen 5c” variant with increased density and power efficiency for key markets. The main design priorities for “Zen 5” are to improve per-core performance and energy efficiency, while maintaining similar area footprint as the prior generation [1]. The “Zen 5” core delivers a -16% generational lPC increase in desktop PC applications [2] while supporting frequencies up to 5.7GHz [3].