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Adding a pci express 10Gb card to slot 15 (PCIe x8) causes one DIMM to disappear

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mokrunka
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2024/09/30 14:03:58 (permalink)
See title. I have 2x 32gb dimms installed with my 12900k. Been running great for a couple years. I also have 2 nvme drives (top 2 slots), my 3090Ti (top x16 slot), and a USB expander in the bottom most x4 PCIe slot.

I want to add 10gb networking, so I added an Intel 10gb card I pulled working from another server to the previously empty x8 PCIe slot. When I boot, one of my ram sticks is no longer detected and it shows only 32 GB available. The system otherwise boots just fine. If I remove this card and boot again all 64 GB are available. If I reinstall the 10 GB card and remove the USB expander, I once again see only 32GB of RAM.

Is there some resource limit that is happening that would cause one DIMM to be unaddressable when installing this NIC?
post edited by mokrunka - 2024/09/30 15:08:05


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    Cool GTX
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    Re: Adding a pci express 10Gb card to slot 15 (PCIe x8) causes one DIMM to disappear 2024/09/30 14:46:08 (permalink)
    which Z690 MB do you have?
    OS?
    PSU? - maybe not enough power?


    Is the AUX power socket on your MB, connected to the PSU to give more power to PCIe?
     

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    mokrunka
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    Re: Adding a pci express 10Gb card to slot 15 (PCIe x8) causes one DIMM to disappear 2024/09/30 14:56:32 (permalink)
    I’ve got the Kingpin mobo.

    Psu is a 1000W Seasonic titanium, so power should not be an issue.

    No, the aux socket is not connected. In fact, I’d never even noticed it was there. Let me see if I can get a 6 pin connector over there and report back.


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    Cool GTX
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    Re: Adding a pci express 10Gb card to slot 15 (PCIe x8) causes one DIMM to disappear 2024/09/30 15:08:00 (permalink)
    mokrunka
    I’ve got the Kingpin mobo.

    Psu is a 1000W Seasonic titanium, so power should not be an issue.

    No, the aux socket is not connected. In fact, I’d never even noticed it was there. Let me see if I can get a 6 pin connector over there and report back.



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