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  1. #1
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    Nov 2017
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    Question Question about PCIe configuration

    Forgive my ignorance if this has been asked previously, trying to understand if the board I have is faulty or I am doing something stupid (most likely the latter).

    My current configuration:
    - Mobo: ASUS ROG ZE
    - CPU: AMD TR 1950x
    - Mem: 32GB G.Skill DDR4 3200MHz (CL16)
    - Graphics: 2 x Sapphire RX Vega 64
    - Storage: 3 x Samsung 960 PRO 512GB NVMe (1 x under ROG shield/heatsink, 2 x in DIMM.2 raiser)
    - Other: Elgato 4k60 in PCIEx4 (right above the PCIEX16_3)

    When I installed Elgato it wasn't recognized in any of the slots other than the x4. When I say recognized I mean that it powers on (logo light comes on and seems to be powered, but Windows doesn't seen any new hardware). Once I installed it into x4 it was recognized and is functioning just fine. PCIEX16_1 and PCIEX16_3 are occupied by GPUs , PCIEX8_2 and PCIEX8/X4_4 are empty, PCIEX1 is empty, and PCIEX4 now has Elgato in it.

    While doing this I recall trying to install Intel DC P2500 into PCIEX8_2 and PCIEX8/X4_4 and seeing the same behavior around October last year, so I thought mobo doesn't support it, but as I experienced the same behavior with Elgato it makes me think either I am not doing something or doing something wrong, or the board is defective and I should probably look into an RMA?

    I can't shuffle GPUs around and unplug everything and move things around as the system is water cooled in dual loop configuration so GPUs are set in place. I'd have to drain the entire GPU loop and remove hard tubing to shuffle things around.

    Can someone shed some light on this? If I have to RMA the board I'll probably replace it with a different manufacturer board and sell ZE as it's a hit and miss when things work and don't work. I can disable SATA, Audio, WiFi and some other onboard devices if the number of lanes is the problem (will test this later), just wondering if I am doing something wrong or if someone else experienced similar problem.

    Thanks!

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