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AMD Ryzen 3000: New Block diagram about PCIe 4.0 on Matisse and X570 chipset

Discussion in 'Frontpage news' started by Hilbert Hagedoorn, May 23, 2019.

  1. NewMaxx

    NewMaxx New Member

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    Definitely exist. Example would be the Prime X470-PRO's M.2_2 socket. The reason they do this is to assist PCIe 3.0 x2 drives which are limited to 2 lanes even if the M.2 socket is 4x PCIe 2.0. There's a lot of these: WD SN500, any of the E8/E8T drives, SX6000NP, etc. In that board's case the socket shares a PCIe clock with one PCIe x1 slot and bandwidth with two PCIe slots (these slots share bandwidth with the x4 electrical x16 physical PCIe slot from PCH). I'd say this was an error but I've seen multiple boards as such, like the TUF X470 Plus Gaming, although some of their boards allow x4 PCIe 3.0 by pulling lanes from GPU.
     
    Last edited: May 27, 2019
  2. DmitryKo

    DmitryKo Master Guru

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    First X570 boards are released, all with three M.2 sockets each offering PCIe 4.0 x4 (64 Gbit/s). The specs are as follows:

    AsRock
    https://www.asrock.com/mb/compare.asp?Models=X570 Taichi,X570 Phantom Gaming X
    M2_1: SATA/PCIe x4 (CPU);
    M2_2: SATA/PCIe x4 (PCH);
    M2_3: PCIe x4 (CPU - disables the third PCIe x16 slot).

    Gigabyte
    https://www.aorus.com/X570-AORUS-XTREME-rev-10#pd_spec
    https://www.aorus.com/X570-AORUS-MASTER-rev-10#pd_spec
    M2A: SATA/PCIe x4 (CPU)
    M2B: SATA/PCIe x4 (PCH)
    M2C: SATA/PCIe x4 (PCH)

    Asus
    https://www.asus.com/Motherboards/ROG-Crosshair-VIII-Formula/specifications/
    N/A

    MSI
    https://www.msi.com/Motherboard/MEG-X570-GODLIKE/Specification
    https://www.msi.com/Motherboard/MEG-X570-ACE/Specification
    N/A

    BIOSTAR
    Racing X570GT8

    Colorful
    CVN X570 Gaming Pro

    There are few such devices and they are quite slow too, so it would only help synthetic benchmarks.
     
    Last edited: May 30, 2019
  3. Alessio1989

    Alessio1989 Maha Guru

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    It wasn't referred to you
     
  4. DmitryKo

    DmitryKo Master Guru

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    X570 PCH actually includes 16 (sixteen) PCIe lanes, in addition to the 24 PCIe lanes on the CPU, with a total of 4 (four) 4-lane physical interfaces (4x PCIe 4.0 x4 PHY), fully configurable in PCIE x16, x8, x4, x2, x1, and SATA modes.

    The chipset uplink is still PCIe 4.0 x4 though, so the bandwidth would be shared across all devices connected to the PCH lanes.

    https://www.planet3dnow.de/cms/47030-uebersicht-mainboards-mit-amds-x570-chipsatz/2/

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]


    Actually it was...
     
    Last edited: May 30, 2019

  5. NewMaxx

    NewMaxx New Member

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    I didn't say it was a good idea, just that they do it and explaining their reasoning. The point was that you could switch if need be. But a bit of a moot point with regard to this thread as we see the downstream lanes are PCIe 4.0 without any compromises, the B550 might be a bit different of course and the chipset pays by needing a fan. Still, exciting for NVMe fans.
     
  6. DmitryKo

    DmitryKo Master Guru

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    I wonder where does it put the Socket TR4 platform and the upcoming Ryzen Threadripper 3000 processors - since the X570 and the Ryzen 3000 offer 40 PCIe 4.0 lanes in total, allowing full-speed triple SLI and three NVMe SSD slots, the practical applications of the TR4 platform will be limited to a few specific tasks that can scale with additional cores and memory channels, such as 4K video editing, and very high-end systems that require 60+ PCIe lanes for things like quad SLI and NVMe RAID-5...
     
    Last edited: Jun 3, 2019
  7. Astyanax

    Astyanax Ancient Guru

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    20 cores and higher.
     

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