MSI X99S GAMING 9 ACK w/ 4x MSI 1080Ti SEA HAWK PCIe channel assignments all messed up

Discussion in 'Intel MoBos' started by pclausen, Oct 12, 2017.

  1. pclausen

    pclausen Limp Gawd

    Messages:
    229
    Joined:
    Jan 30, 2008
    Hey guys,

    I have been fighting this for the last 5 hours and I finally had to throw in the towel and post here hoping for some suggestions.

    Here's the hardware:

    MSI X99S GAMING 9 ACK (latest BIOS installed)
    6850K CPU
    2 x G.SKILL Trident Z 3200-14-14-14
    4 x MSI 1080Ti Sea Hawk EK X
    1 x Samsung 950 PRO M.2 512GB

    Here's a pic of the rig:

    [​IMG]

    As you can see, there are only 4 cards installed in slots E1, E2, E4 and E5.

    However, a run down of what BIOS believes is installed in the slots shows the following:

    PCI_E1 running at x8:

    [​IMG]

    PCI_E2 running at x8:

    [​IMG]

    PCI_E3 running at x8: WFT, there is nothing in this slot!

    [​IMG]

    PCI_E4 running at x16: Why? This should be running at x8

    [​IMG]

    PCI_E5 running at x8:

    [​IMG]

    PCI settings as follows (believe, my have tried everything under the sun here, but nothing changes the above readings):

    [​IMG]

    Oh yeah, and the 950 PRO does not show up here: (nor did it show up in the board explorer pics above)

    [​IMG]

    But it does show up here:

    [​IMG]

    Integrated Peripherals settings are all left at default:

    [​IMG]

    Setting this made booting into the Win10 install already on the 950 not work:

    [​IMG]

    So, with WHQL support disabled, I'm able to boot into Windows, but within a few minutes, things get unstable and I'm not able to save anything to the 950 in the M.2 slot.

    Also, I'm completely unable to boot into Ubuntu from a USB stick. Stick works just fine in just about every other rig I have.

    So wtf is going on? Defective X99 mobo?

    Should I rip out 3 of the 1080Ti's? Really don't want to as everything has been leak tested at this point.