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Rumor | One Zen 4-based AMD EPYC processor could support up to 12TB of DDR5 RAM thanks to its advanced specs

An allegedly leaked AMD slide for Genoa. (Source: ComputerBase)
An allegedly leaked AMD slide for Genoa. (Source: ComputerBase)
AMD's next generation of EPYC processors, currently referred to as "Genoa", are tipped to support 12-channel memory. Now, it is also slated to support 1TB of DDR5 RAM via each of these channels, for a grand total of 12TB. Then again, it may be capable of doing so under certain server-grade conditions only.

AMD is now projected to follow the EPYC Milan series of high-performance CPUs with their Zen 4-based Genoa successors. This silicon is already purported to boost its RAM support to the tune of 12 channels (as opposed to 8 in Milan) - and in DDR5, too. Now, a new leak builds on these claims with hints at a maximum capacity of no less than 12TB.

This new rumor has been sparked by a diagram allegedly showing the layout of a new "Titanite 2P2G" rig in which dual EPYC Genoas do indeed seem to be connected to 12 separate modules of RAM (each of which are...yep, DDR5) each. 

According to a further tip from ComputerBase, each of them could be 1TB in size - however, this only applies if each one is 3DS RDIMM in nature. This form of memory has an extremely advanced 16-rank structure - however, it apparently comes with the compromise of reducing the maximum transfer rate to 4,000MT/s, as opposed to a theoretical 5,200MT/s using 4- or 8-ranks LRDIMM with 256GB per channel instead.

Nevertheless, the rumored leap to 12-channel support remains a pretty intriguing prospect; plus, as TechPowerUp points out, the bandwidth implied with the alleged new spec might make up for the drop in apparent max speed.

This rumored system...
This rumored system...
...may be possible thanks to this leaked spec-sheet. (Source: @HansDeVriesNL, ComputerBase)
...may be possible thanks to this leaked spec-sheet. (Source: @HansDeVriesNL, ComputerBase)
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Deirdre O'Donnell
Deirdre O'Donnell - Senior Tech Writer - 5122 articles published on Notebookcheck since 2018
I became a professional writer and editor shortly after graduation. My degrees are in biomedical sciences; however, they led to some experience in the biotech area, which convinced me of its potential to revolutionize our health, environment and lives in general. This developed into an all-consuming interest in more aspects of tech over time: I can never write enough on the latest electronics, gadgets and innovations. My other interests include imaging, astronomy, and streaming all the things. Oh, and coffee.
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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2021 12 > One Zen 4-based AMD EPYC processor could support up to 12TB of DDR5 RAM thanks to its advanced specs
Deirdre O'Donnell, 2021-12-12 (Update: 2021-12-12)