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Helpful ReplyHot!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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    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 18:40:49 (permalink)
    Alright, ran another 6pin PCIe cable back there and tried again. Same results this time. No matter whether the USB card is in the slot below or not, the presence of the 10gb NIC causes one of the memory sticks to not be read.


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    Sajin
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    Re: Adding a pci express 10Gb card to slot 15 (PCIe x8) causes one DIMM to disappear 2024/09/30 23:36:39 (permalink)
    Hmm. Now that is an odd one. You should contact evga to see what they have to say about this. Maybe some odd bios bug?


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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 2024/10/01 08:39:26 (permalink)
    Fast BOOT is Off in BIOS?

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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 2024/10/01 19:03:49 (permalink)
    Not sure if fast boot is on or not - I'd have to check. What does that have to do with this (genuinely curious)?
     
    I also did some more reading about my NIC. It seems it's a PCIe 2.0 card, not 3.0. I am buying a PCIe 3.0 x4 card (which I needed to do anyway because the fan in this one turns out to rattle), the Intel X550-T2. When that arrives, I'll try again.


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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 2024/10/01 20:04:22 (permalink) ☄ Helpfulby mokrunka 2024/10/02 18:32:09
    mokrunka
    Not sure if fast boot is on or not - I'd have to check. What does that have to do with this (genuinely curious)?
     
    I also did some more reading about my NIC. It seems it's a PCIe 2.0 card, not 3.0. I am buying a PCIe 3.0 x4 card (which I needed to do anyway because the fan in this one turns out to rattle), the Intel X550-T2. When that arrives, I'll try again.




    Anytime you add or remove hardware; "you Want the MB to take inventory" - then the proper resources are applied - After the hardware change is recognized. 
    Your PC always has power (short of unplugging it) & that "soft off state of a Windows shutdown"  ---> prevents proper resource allocations needed by hardware changes.
     
    Windows Fast Startup causes its own issues when you change Drivers or Hardware -- because Win Fast Startup just uses the File from the Previous good start to launch the next session of Windows ... & this lets Win disregard any & all changes to the PC. 
     
    Easiest fix for Win Fast Startup - Hold the shift key down before you select shutdown & keep the shift key down until the PC is totally powered Off.  That simple step, erases the last previous good start file, this forces Windows to look at everything again & properly allocate resources & recognize new drivers
     
    Both of those steps are considered a Best Practice
     
    This may or may not help with the current strange issue you are seeing: hardware added & RAM disappearing issue
     
    They are a simple set of steps, costs nothing, might help & cant hurt to do, kind of a back to basics thing
     
     

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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 2024/10/03 17:28:05 (permalink)
    Ok, I tried turning off fast boot, and holding shift while shutting down and doing a cold shutdown/reboot.
     
    I tried this with my new, Intel X550-T2 PciE 3.0 x4 card in both available PCIe slots.
     
    I get the same result, one DIMM goes undetected and my RAM goes from 64GB to 32GB.
     
    I'm stumped.


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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 2024/10/04 07:36:54 (permalink)
     
     
     
    So, the puzzle continues

    Please, list all connected devices including the USB ports ?     
     
    Number & type of Monitor(s) / does monitor(s) have USB Hubs that you are using?

    RAM?      - Brand & Model # - using XMP settings in BIOS? 
            - is the Voltage for RAM set to Auto or did you set V, manually (to the RAM Mfg setting on sticker on RAM)? --> set it manually if on Auto 

    MB BIOS ---> which BIOS are you using / have you tested?      
     
    Are you setting the MB PCIe lane Manually (in BIOS) to PCIe 3.0 -- before you install the 10G NIC


    Z690 CPU         (all only have 20 PCIe lanes) 

    1 - PCIe 5.0 @ 16x (or 2 @ 8x)

    1 - PCIe 4.0 @ 4xZ690 Intel spec Chip-set Expansion Options
    • Direct Media Interface (DMI) Revision 4.0
    • Max # of DMI Lanes 8
    • PCI Express Revision 3.0, 4.0
    • PCI Express Configurations ‡ x1,x2,x4
    • Max # of PCI Express Lanes 28 
       
       
      OK looks like you are using 16 + 4 +4 +1 = 25 of the available 28 PCIe lanes ... before you install the 10G NIC
       
      adding the Intel X550-T2 PCIe 3.0 x4 card --- requires 4 more PCIe lanes, So GPU should drop to 8x
       
       

       EVGA Z69-0 DARK Manual

      PCIe Lane Distribution
      ❑ PE1 – x16 (Gen5, x16 lanes from CPU, x8 shared with PE2)
      ❑ PE2 – x8 (Gen5, x8 lanes from CPU)
      ❑ PE3 – x4 (Gen3, x4 lanes from PCH, x4 shared with PU)
       
      M.2 Lane Distribution*
      ❑ M.2 Key-M (110mm, Top, M.2_1) – Gen4 x4 from CPU
      o This slot supports PCIe M.2 SSDs / Intel® Optane.
      ❑ M.2 Key-M (110mm, Middle, M.2_2) – Gen4 x4 from Z690 PCH
      o This slot supports PCIe M.2 SSDs / Intel® Optane
       
      M.2 Key-E (32mm) – Gen1 x1 from Z690 PCH
      o This slot is pre-installed with the EVGA Wi-Fi/BT Module
       

       
       

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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 2024/10/04 09:53:53 (permalink)
    • DDR5 2x 32GB DIMMs, Kingston Beast 5600Mhz - XMP yes
    • MB Bios: forgot to check this. iirc I've got it updated to the latest version from sometime in 2023
    • Monitors: 2x. Once of them has USB devices plugged into it. I'd have to check, but I have most all of the ports on the back of the mobo populated with USB devices. Including joysticks, mouse, keyboard, mic, etc. I'm not using any USB hubs/expanders.
    • I have tried to manually set the PCIe lane to PCIe 3.0, as well as disabling the bluetooth/wifi U.2 device (I don't use it)
    • Because of what you mention about the PCIe lanes, I've tried both with and without the USB PCIe card. So, should be using max of 28 lanes with the NIC installed.
    • I did notice this in the device manager. I tried updating all intel chipset drivers using their tool, and it says all of the drivers are up to date. I've confirmed the 10Gb NIC is working. So, basically everything is great except for the fact that i lose a RAM stick!
    • ETA: the image didn't work. it says there is a yellow ! on the 'resource hub proxy device'. it says this device is currently waiting on another device or set of devices to start. Dependencies PCI\VEN_8086&DEV_7AFC&SUBSYS_10633842&REV_11\3&11583659&0&C8
       
    post edited by mokrunka - 2024/10/04 09:56:02


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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 2024/10/04 12:07:32 (permalink)
    Sounding more like a CPU or MB socket issue; unlikely by maybe a MB issue.
     
    If any of those many, tiny contact fingers under your CPU are even slightly out of place ... anything from a Bent Pin in the CPU socket, to an uneven CPU or over tightened CPU cooler .... might be the root cause of this issue.

     
    We have no idea of your experience level or attention to details; so, I'm just going to ask the following questions.
     
    How sure are you that you:
     
    1) Installed the CPU, gently & kept it level, when placing CPU into the MB socket?


    2) That you kept the CPU level while tightening the CPU cooler, tightening in the correct pattern in small steps?


    3) That you did not over tighten the CPU cooler mounting screws?
     
    The last tests I can even think of: 

    Remove ALL USB devices - except mouse & KB; this includes Disconnecting that monitor USB hub.  Also disconnect the CASE wires/plugs from the MB ....(sound, USB, reset, start ...) & use only one monitor for testing
     
    We want to test that PC as bare-bones as possible
     
    Next test would be to remove any Drive .... except the Boot drive & test again

    last possible thing to try ---> Pull the MB from the case, place on the MB box & test again

     
     
     
     
     
     

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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 2024/10/04 12:27:04 (permalink)
    I've got experience building PCs, probably built close to 30 or 40 of them (showing my age, I just realized I joined these forums 15 years ago!). I am confident I've got the CPU mounted properly, and know what to look for wrt bent pins and such etc. Plus, I've had no issues in the 2 years I've been using this system with RAM or BSODs randomly or anything like that. Bent CPU pins I know can manifest themselves in mysterious and unexpected ways, but as mentioned, I'm as certain as I can be that I didn't screw anything up installing it, and that the pins weren't bent before I mounted the CPU and waterblock. I had some trouble when I built it the first time with RAM, and wound up having to swap kits out. This was one of the earlier DDR5 boards at the time, and getting the RAM and timings and such was a little tricky at first. So, I'll just chalk it up as some kind of compatibility issue and move on (next reboot after I'm done working I'll double check the BIOS is up to date though).
     
    I may continue tinkering with it and doing the usual stuff you mention. tbh, I don't have as much free time for tinkering as I once did, and may just shelve this project until it's time to upgrade when Z890 comes along. For now, I can live with the onboard 2.5Gb NIC, especially since I don't really NEED 10Gb yet as my file server is still spinning rust - plans for the future to upgrade that to SSDs. What prompted all this is that I've been slowly upgrading my home network infra to get to 10Gb, and my main workstation/desktop PC is pretty much the last remaining item that can't do 10Gb.
     
    I very much appreciate your help with the troubleshooting! I will update this thread if I fix it, just in case it helps someone else.


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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 2024/10/04 12:34:25 (permalink)
    Wish I could have helped more.
     
    Maybe I missed something? ---> Email contact EVGA Support at Support@EVGA.com if you do need further assistance.
     
    Point them to your thread ---> https://forums.evga.com/FindPost/3625993
     
     
     
    After you do those tests Time for a ---> EVGA RMA, if it is still under warranty
     
    check warranty status https://www.evga.com/community/myProducts.asp
     
    OR
     
    enter the serial number here:  Warranty Check
     

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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 2024/10/04 12:40:58 (permalink)
    Not your fault at all!
     
    I just checked, and it is still in warranty. I'll reach out and see what they say.


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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 2024/10/04 12:51:51 (permalink)
    mokrunka
    Not your fault at all!
     
    I just checked, and it is still in warranty. I'll reach out and see what they say.



    Will look for your update

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