AMD: Pre-X570 boards will not support PCIe Gen 4

Discussion in 'Frontpage news' started by Hilbert Hagedoorn, Jun 3, 2019.

  1. Kaarme

    Kaarme Ancient Guru

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    I don't think so. Pre-x470 boards aren't supposed to support PCIe 4.0, so there's no need to offer support for such a functionality. Every mobo model needs its own bios release anyway, so a manufacturer could check some of their models to see if the first 16x port seems to work with PCIe 4.0. If it seems to, make the bios switch visible. Add a warning to it, perhaps.

    However, like I said, I don't see why they would do such a thing from a practical point of view since it could rob them of some new sales. I might even believe they have had some talks about this with AMD, to see what sort of incentives each generation would offer, to balance the CPU compatibility remaining there, as opposed to Intel's scheme. So far the generations have had at least something little. PCIe 4.0 might be the main thing for x570. It would certainly be more visible in marketing than x470's benefit over x370.
     
  2. nevcairiel

    nevcairiel Master Guru

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    Thats not how product support works. If you offer an option, it has to work. No amount of warnings will deter people from using it, expecting it to work, and whining about it not working.

    Even if all you do is tell them "its not officially supported", it'll increase the support volume, and will be looked unfavorable upon by people encountering such problems.
     
  3. Fox2232

    Fox2232 Ancient Guru

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    If it does not work, reset BIOS. Same as with certain memory configurations preventing board form realizing it can't get it working.
     
  4. D3M1G0D

    D3M1G0D Ancient Guru

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    I'm not surprised, based on what I've read about PCIe 4.0. I'm also not particularly bothered by it, since I can't really make full use of lane bandwidth anyways. Of course 5 GB/s read for SSD is nice and all but I don't do heavy file transfers/editing, and GPUs don't come close to maxing out PCIe 3.0 lanes @ 16x.

    I'll most likely wait until AMD's next socket for PCIe 4.0. We'll probably have more components that can make use of it by then. Of course those who can utilize the extra bandwidth might have to upgrade, but I think most of us will be fine with our current boards.
     

  5. schmidtbag

    schmidtbag Ancient Guru

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    I'm betting PCIe 5.0 will be used by AMD's next socket, along with DDR5. The spec for PCIe 5.0 is already complete. I'm sure 4.0 will be very short-lived.
     
  6. Kaarme

    Kaarme Ancient Guru

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    We are talking about bios here. It's full of switches and settings that can make your PC not boot, crash randomly, or produce errors. In ye olde times some bios might have allowed you to unlock a disabled core in an AMD CPU, even though that core might actually be broken.

    Sure, it would work, as intended. That's why I said the manufacturer would need to do some checks beforehand. If it didn't work for a particular PC owner out there with their particular pile of hardware, well, that's tough luck. Just like some people receive a CPU that can OC extremely well, whereas another gets one that will only offer a pittance. All the support needs to do is to give advice on how ot reset te bios, which is also basic knowledge in the manual.
     
  7. H1TMANza

    H1TMANza Member

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    What do you guys think about pairing a 3800x CPU on a b350 motherboard ? No overclocking , just stock speeds. Would I get away with murder ? Best bang for buck ?
     
  8. schmidtbag

    schmidtbag Ancient Guru

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    Do you even know if your board will support the 3000 series? Because not all B350 boards can or will. Does it have an 8-pin CPU power connector? Is there a heatsink on the VRM?
    If the answer to each of those questions is "yes" then I'm sure you could run the 3800X on it, but bear in mind the XFR performance will likely be lacking, so you're not going to get the full performance you paid for.
     
  9. Astyanax

    Astyanax Ancient Guru

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    Robert Hallock is also known for being wrong.
     
  10. insp1re2600

    insp1re2600 Ancient Guru

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    my x470 board recieved a beta bios that now has an option to switch between pci-e gens in the cpu options.
     

  11. Astyanax

    Astyanax Ancient Guru

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    PCIE is a negotiated link, it will already automatically Down-Link when too many errors are reported during pci-e training.

    my x470 board recieved a beta bios that now has an option to switch between pci-e gens in the cpu options.

    be our test subject >:D
     
  12. Geoffrey Morris

    Geoffrey Morris New Member

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    Not having PCIe-4 is not a big deal, but they already enabled it on my Gigabyte X470 board and the F40 bios says full 3rd generation Ryzen CPU support. It is also running AGESA 1.0.0.2, so I have no clue what he means by final bios update. The whole thing sounds extremely fishy!
     

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