On November 9, AMD CEO Su Zifeng announced the roadmap of Zen 4 architecture CPU at the AMD Accelerated Data Center event, including 96 core Genoa and 128 core Bergamo server CPUs.

Source: tomshardware ↑

The event released the Instinct MI250X GPU and four EPYC Milan-X processors (the highest EPYC 7773X is 64 core 128 threads, carries up to 768MB L3 cache, and the lowest EPYC 7373X is 16 core 32 threads), and more exciting is AMD's roadmap for the next two years.

Source: tomshardware ↑

The new roadmap covers the fourth generation of EYPC server CPUs. They will use TSMC's 5nm process, claiming that the transistor density and energy efficiency ratio are twice that of the current EPYC 7nm process, and the performance is improved by 25% (also good news for Ryzen Zen 4 on the consumer side).

Source: tomshardware ↑

The new 96 core Genoa (Genoa) is a Zen 4 architecture. Both single core and multi-core performance will be improved. It supports DDR5 memory, PCIe 5.0 and CXL 1.1 (Compute Express Link), and is designed for high-performance computing (HPC), general-purpose data centers, enterprises, and cloud servers. The new products have been sampled by customers and will be released in 2022.

Source: tomshardware ↑

The 128 core Bergamo will be released in 2023. It is a high-density multithreading architecture specially customized for cloud native applications, integrating 128 Zen 4c cores. Here, "c" represents the design of cloud native workloads. In other words, AMD Zen 4 architecture will also have two cores, and Zen 4c is obviously a "small core".

Bergamo also supports DDR5 memory, PCIe 5.0, CXL 1.1, the same RAS and a full set of Infinity Guard security features. Its instruction set and pins are compatible with Genoa, which means you can put two generations of CPUs in the same processor.

The new Zen 4c core should be smaller than the standard Zen 4 core, and some unnecessary functions should be removed to improve the computing density. However, it has a cache structure specially optimized for density to increase the number of cores, so as to cope with the cloud server load that requires multi-threaded performance. The independent cache of the new core may be smaller, or even one level less, but AMD did not disclose more details. However, AMD clearly stated that Bergamo CPU will have higher energy efficiency ratio and performance output.

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