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AMD EPYC Genoa under X-ray: 16 cores and 2 CCD drives

A new leak has allowed us to see an AMD EPYC Genoa processor in an unusual way, and that is, thanks to the use of X-rays, it has been possible to discover what is under that huge IHS (integrated heat sink) that we see in the cover image. The connectors are, as expected, a matrix of gold-plated flat contacts, confirming the use of an LGA socket, as we had already commented on previous occasions.

The entire AMD EPYC Genoa series will be based on the Zen 4 architecture, so the information that we are going to see below is very important because it has been taken from an early sample, which gives it undoubted validity, and because it also allows us confirm some things that were in the air, such as the exact configuration of cores and threads per CCD unit, also popularly known as chiplet.

This chip will use the TSMC 5nm fabrication node and it will have, as we see in the attached image, two CCD units, which are the smallest rectangles. At the center, we have the I / O chip, where all interface elements are integrated, in an externalized way, including the DDR5 memory controller. This chip will be manufactured with the TSMC 6nm process, according to the latest information we have.

Given that the leaked EPYC Genoa chip will have a 16-core, 32-thread configuration, it is clear that each of those CCD units will have a total of 8 cores and 16 threads. This seems to rule out, almost completely, the rumors that, with the jump to Zen 4, AMD was going to start using CCD drives with a configuration of 16 cores and 32 threads.

The EPYC Genoa series will have different core and thread configurations, the most powerful being the version with 96 cores and 192 threads. This will be equipped with a total of 12 CCD units, will add a total of 384 MB of L3 cache memory, it will be compatible with DDR5 memory and also with the PCIE Gen5 interface, which means that it will mean a significant jump both in raw performance. , by IPC and by increase of cores, as at the platform level. Its launch is scheduled for the middle of this year, although it is still We do not have an exact date, so we have to wait.

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