Issue(s) with PCIe 4.0 & PCIe extension cables...?

Discussion in 'Small Form Factor Systems' started by Boil, May 21, 2019.

  1. Boil

    Boil [H]ard|Gawd

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    Just curious how the move to PCIe 4.0 for upcoming X570 motherboards will affect those using a chassis that requires a PCIe extender cable...?

    This may also impact any of the older AM4 motherboards that can (with proper BIOS update) run PCIe 4.0 in the first PCIe slot...?

    Thoughts...?
     
  2. IdiotInCharge

    IdiotInCharge [H]ardForum Junkie

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    Might just renegotiate to PCIe 3.0? Might be user selectable?
    So long as that's an option, shouldn't be a problem.

    If PCIe 4.0 is needed, then a chassis adjustment may be needed too.

    [I do have an ITX system that uses one myself...]
     
  3. SaperPL

    SaperPL [H]ard|Gawd

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    Does it really matter to anyone in gaming? Right now I think we're barely using 8 lanes of pci-e 3.0 bandwidth, techpowerup did this kind of test multiple times and gamers nexus did one as well. Pci-e 4.0 will matter for bifurcation and nvme storage only, unless you are doing some scientific/crypto cracking I think.

    I'll dig in this subject when there's actually 4.0 board and GPU reviews.
     
    Last edited: Jun 3, 2019
  4. Fasda

    Fasda n00b

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    I'm hoping there'll be bifurcation controllers that splits up pci-e 4 lanes into twice that amount in pci-e 3 lanes.
    But knowing the main manufacturers of such they'll be obscenely expensive and require a NDA that'll feel like making a deal with the devil is a great idea.