ROG Maximus Hero XIII PCIe 4.0

Discussion in 'General Hardware' started by Jonnygrunge, Sep 7, 2021.

  1. Jonnygrunge

    Jonnygrunge Master Guru

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    GPU:
    KFA2 4090 SG1
    Hi All, I have installed 4 NVMe drives my SN850 requires PCIe 4 x4 for max speed my other drive 970 plus is sitting in M2.2 slot which shares lanes with the PCIe slots 1 and 2.
    As a result my VGA card is now running at x8 with this M.2 slot enabled, question is to save me taking out one of my older drives to un populate that M.2 slot free up the PCIe bandwidth is there any real world difference at 1440p with my 3090 running at x8 or x16.
     
  2. 386SX

    386SX Ancient Guru

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    GPU:
    AMD Vega64 RedDevil
    Hilbert tested this some years ago and the results showed you started to see a real limitation at about PCIe 2.0 x4 iirc.
    Given tech advancement and stuff I guess your GPU should be fine at say PCIe 2.0 x8 by now. This would translate to about PCIe 4.0 x2.

    Why not try it yourself? Set lanes even lower than you currently use (less than x8) and see if you can catch some drops in fps by firing up your favorite benchmark and run it at the specs you use during gaming. So you will see changes based on a real world setup, yours. ;)
     

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