Leak suggests AMD's upcoming 'Turin' Zen 5 CPUs will support 4TB of RAM at 6000 MT/s

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By Christopher Harper
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A Socket SP5 AMD Epyc 9000 motherboard listing reveals support for DDR5 6000 MT/s operation when using Turin CPUs

Leaked shot of two AMD Zen 5 Epyc Turin CPUs, posted by @yuuki_ans on Twitter
Leaked shot of two AMD Zen 5 Epyc Turin CPUs, posted by @yuuki_ans on Twitter (Image credit: @yuuki_ans on Twitter)

AMD's upcoming Zen 5 Epyc CPUs, codenamed Turin, have previously been confirmed to occupy the same SP5 socket as their Zen 4 predecessors while having 192 cores— but now, a leaked motherboard spec listing  from renowned leaker @momomo_us on X / Twitter, has revealed yet more details. Since these CPUs were previously slated for a 2024 release, this spec leak could point towards an upcoming official announcement. As ever with leaks, take the news with a pinch of salt until an official announcement is made.

The leaked motherboard spec listing describes a Socket SP5 board that supports DDR5 speeds of up to 6000 MT/s with 4 TB of RAM, but only with a Turin CPU inserted. Without Turin, it seems that board's limit is 4800 MT/s— or as low as 3600 MT/s, which is characteristic with Zen 4's RAM limitations at 4 DIMMs.

The motherboard is also listed as having a maximum CPU TDP of 400 Watts. Zen 5 Epyc CPUs are supposed to support up to 500 Watts, and have even been rumored to go as high as 600 Watts. This is either an error of the listing or a legitimate compatibility issue with the motherboard, though 400 Watts would be in character with high-end Zen 4 SP5 motherboards.

Besides the memory spec, it's also worth noting that the last-gen Zen 4 CPUs peaked at 96 lanes of PCIe 5.0, as opposed to the claimed maximum of 120 PCIe 5.0 lanes with this motherboard. While some slots are specced differently than others, these specs still suggest an overall 20% improvement in PCIe lane support on Zen 5 Turin, not just faster RAM.

In any case, we should have some more solid information on Zen 5 Epyc "Turin" CPUs and boards sooner rather than later. Previously, AMD's roadmap pointed toward Turin's release later this year in 2024, and we're already at the tail end of Q1 with no official release date announcement. As of September 2023, AMD also completed its Zen 4c CPU lineup, which means Zen 5 should be the imminent next release on both desktop and server platforms, now. Even Linux is getting Zen 5 patches!

Christopher Harper
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6 Comments Comment from the forums
  • usertests
    SP5 already supports 12 channels and 6 TB of RAM. Is this just a particular system supporting less?
    Reply
  • Metal Messiah.
    Besides the memory spec, it's also worth noting that the last-gen Zen 4 CPUs peaked at 96 lanes of PCIe 5.0, as opposed to the claimed maximum of 120 PCIe 5.0 lanes with this motherboard.

    That's NOT correct. Kind of misleading info. 96 PCIe lanes are only applicable for the EPYC 8004-series processors codenamed SIENA. These are based on the SP6 socket.

    Compared to the total 128 lanes of the connectivity found in the Genoa and Bergamo chips. 128 lanes of PCIe Gen 5 connectivity to peripherals (96 lanes in the EPYC 8004 Series and up to 160 lanes in EPYC 9004 Series 2-socket designs).

    The exact same I/O die is being used in all 4th Gen EPYC processors, however their capabilities vary with how the die is connected to the outside world.

    To put it in simple terms, the larger SP5 package can enable pins to carry 128 lanes of I/O bandwidth and 12 memory channels. The smaller SP6 package has fewer pins, so obviously the I/O die is connected to 96 lanes of I/O connectivity and six memory channels.

    Also, the Tweet has got all the info wrong on the SP5 socket. Those specs are not very clear, including the PCIe lanes. I don't have time to go into much details, but take those leaked spec data with some caution.

    usertests said:
    SP5 already supports 12 channels and 6 TB of RAM. Is this just a particular system supporting less?

    I think these specs should apply only for the Zen 5C cores. Since the upcoming TURIN lineup will be based on both Zen 5 & Zen 5C core architectures, these lower specs could be for a different SOCKET config, mostly sporting Zen 5C "dense" cores.
    Reply
  • Metal Messiah.
    Oh BTW, I doubt this TURIN lineup will land up in retail before the end of 2024 though. at least the "C" core server variants. Rumors have been circulating for an early or mid-2025 launch, via insider AIB board forums.
    Reply
  • TechyIT223
    Metal Messiah. said:
    Oh BTW, I doubt this TURIN lineup will land up in retail before the end of 2024 though. at least the "C" core server variants. Rumors have been circulating for an early or mid-2025 launch, via insider AIB board forums.
    What about the consumer client zen 5 desktop processors release date?

    I'm more interested in a 6 or 8 core 3DVcache zen5 gaming monster.
    Reply
  • Metal Messiah.
    I expect client Zen 5 CPUs to land around late Q3 2024 timeline. We need to first wait for AMD to announce and unveil these processors around Computex in JUNE.

    If everything goes as planned, we can see these chips land up in retail shelves before the end of this year. Just don't expect any 3D-VCache SKUs though. These won't land until next year though, i.e. Q1/2 2025, assuming AMD has them booked in their pipeline.
    Reply
  • TechyIT223
    Thanks for chiming in MM. 🙂
    Reply