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

    Sep 19, 2015
    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...?

  2. IdiotInCharge

    IdiotInCharge [H]ardForum Junkie

    Jun 13, 2003
    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

    Aug 31, 2014
    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

    Mar 17, 2019
    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.