After the Instinct MI200, AMD had a surprise in store at its Accelerated Data Center Premiere event: a preview of Zen 4 for servers in the form of Genoa and Bergamo. On this basis, Epyc should initially offer 96 cores in 2022, and then up to 128 cores as a private cloud model in the first half of 2023.
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96: Official Genoese “Basic Issue”
While a lot of information about unofficial information has recently become known about Genoa, AMD is now officially putting it on the table: up to 96 cores, DDR5 and PCIe 5.0 are the main products, as well as support for CXL as a thread. TSMC manufactures CPU chips at an improved production of 5nm according to AMD, which can speak in favor of the N5P process step. With the new process alone, AMD promises 25 percent more performance, twice the efficiency and packing density.
Genoa is on schedule, is currently being validated with partners and should fully follow in the footsteps of previous Epyc processors in 2022.
Bergamo with Zen 4c with more cores, but less cache
The new add-on that AMD mentioned by name for the first time today is interesting: Bergamo. AMD plans to introduce this CPU with 128 cores in the first half of 2023. According to AMD, Bergamo is equipped with 128 “Zen 4c” cores, which are “Zen 4” compatible software and optimized for configurations with more cores for cloud workloads. The original that benefits from maximum spiral density. The processor is a Genoa-compatible socket, which will find its place in the same massive socket called SP5 with 6096 contact areas.
In order to meet the increased space requirements of 128 cores compared to Genoa, cache savings were introduced in chipsets, which obviously still contain 8 cores. It is not known how much cache is lost. With the same eight-core computational die, 16 chips will be needed, that is, eight instead of six on top and bottom I/O die. An illustration depicting CEO Dr. However, Lisa Sue, who skillfully concealed it, indicated during the presentation that it would be exactly the same.
New Epyc CPUs with Milan X architecture, which combine Zen 3 cores and a 3D cache of 768MB L3 per socket, won’t be a dream far ahead, but will be available from Q1 2022.
