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  1. #1
    New ROGer Array
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    Z690 Formula - Video running x8

    I am very confused and I need your help.
    My setup is:
    - z690 Formula (BIOS 702)
    - 32Gb Corsair 5200 ram (2x16)
    - 1 NVMe (connected to slot M.2_1 - CPU)
    - RTX 3090 (connected to PCIEX16 slot (G5)_2 (not to overheat the NVMe)

    Why the video card appears at x8 speed ???? The three PCIEs are not x16 ???

    When use Nvme M2_1 + Video PCIEX slot (G5)_1, Video = x16
    When use Nvme M2_1 + Video PCIEX slot (G5)_2, Video = x8

    I failed to configure something in the BIOS ???

    Thank you in advance for any guidance.
    Last edited by TZero; 12-21-2021 at 02:21 AM.

  2. #2
    ROG Guru: Yellow Belt Array
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    Aug 2014
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    Please read the motherboard manual. It's there for a reason.
    The 2nd PCIE slot will never run at x16. When populated it will run at x8 (shared with PCIE slot 1 x8).
    Lane configuration is x16/x0 PCIE1, x8/x8 PCIE1 + PCIE2. x0/x16 is not a valid configuration.

  3. #3
    New ROGer Array
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    Red face

    Quote Originally Posted by Falkentyne View Post
    Please read the motherboard manual. It's there for a reason.
    The 2nd PCIE slot will never run at x16. When populated it will run at x8 (shared with PCIE slot 1 x8).
    Lane configuration is x16/x0 PCIE1, x8/x8 PCIE1 + PCIE2. x0/x16 is not a valid configuration.

    I appreciate your willingness to explain. Thank you very much.

    Honestly, I searched the manual several times and only found reference when using the ROG M2 Card.

    I'm just disappointed why then in the manual does it refer to 3 x16 slots?
    Anyway, I thank you again for your patience.

  4. #4
    ROG Enthusiast Array
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    Quote Originally Posted by TZero View Post
    I appreciate your willingness to explain. Thank you very much.

    Honestly, I searched the manual several times and only found reference when using the ROG M2 Card.

    I'm just disappointed why then in the manual does it refer to 3 x16 slots?
    Anyway, I thank you again for your patience.
    You missed this part then

    2 x PCIe 5.0 x16 slots (supports x16 or x8/x8 modes)**
    Intel® Z690 Chipset***
    1 x PCIe 4.0 x16 slot (supports x4 or x4/x4 mode)***

  5. #5
    New ROGer Array
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    Quote Originally Posted by OutSider420 View Post
    You missed this part then

    2 x PCIe 5.0 x16 slots (supports x16 or x8/x8 modes)**
    Intel® Z690 Chipset***
    1 x PCIe 4.0 x16 slot (supports x4 or x4/x4 mode)***
    I thank you too.
    I think I fell into the marketing trap.
    I thought I had 3 x4 native M.2 slots (actually there are only 2 - you have to use the PCIEX together with the ROG CARD) // 4 PCIEX x16, which actually aren't either.......I'll end up selling this board on Aliexpress

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