AMD has teased its next-gen Epyc CPUs based on the Zen 4 core architecture. The EPYC 7004 lineup codenamed Genoa is a general-purpose server stack with up to 96 cores (across 12 CCDs). (Tramadol) In addition to this, AMD also teased a cloud-focused variant of Zen 4 called Bergamo. As already discussed multiple times, these will be based on a stripped-down version of Zen 4, called Zen 4c (from 4D).
Both Genoa and Bergamo will be based on TSMC’s N5 (5nm EUV) node. According to AMD, Genoa will offer 2x the efficiency and 25% more performance than the existing Epyc Milan chips. In addition to a new socket (SP5), we’re looking at DDR5 memory support, PCIe Gen 5 plus CXL 1.1 integration as well. Genoa will feature as many as 128 PCIe Gen 5 lanes in a 1S and 160 in a 2S configuration. The TDP will reportedly be increased to 320W with a cTDP of up to 400W.
Bergamo, on the other hand, will be a dedicated lineup for cloud providers. Although it’ll leverage the same ISA (and socket) as Zen 4, the core complexes will be tweaked (most notably the cache) to pack sixteen cores in one CCD (vs eight on Genoa). Bergamo will feature up to 128 cores and is clearly a jab at the emergence of Arm-based designs in the cloud sector (such as those from Amazon and Google).
These announcements can be seen as a direct response to Intel’s upcoming 4th Gen Xeon-SP “Sapphire Rapids” processors. Although Milan-X is the immediate competitor, Genoa will be the lineup to look out for the next year. Bergamo is slated to land in early 2023 while Genoa should arrive in the second half of 2022.
