I set RAM frequency to advertised spec instead of using XMP(question)

Discussion in 'General Hardware' started by Reclusive781, Mar 29, 2024.

  1. Reclusive781

    Reclusive781 Ancient Guru

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    And that's all I changed, XMP isn't stable. I left everything else on auto.

    With everything else set to auto it all should automatically adjust the FLCK clock, voltage, timings, etc. right?
     
  2. Yeah everything should adjust to match.

    If your RAM isn't stable with XMP though it is likely bad, XMP is still the intended frequency for it.
    How new is the RAM? Can you still RMA it?
     
  3. Horus-Anhur

    Horus-Anhur Ancient Guru

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    But does your CPU support that speed?
    What memory are you using? And what CPU and motherboard?
     
  4. If profile is accurate has 5800X3D, MSI B550 mobo and 3600 MHz memory, shouldn't be a problem. Amount is a little weird though, 48 GB, 16+16+8+8?

    @Reclusive781 you must have preferably identical memory modules in pairs to achieve best performance and stability.
    If you are mixing and matching modules with different specs you might have issues.

    If your memory amount is accurate sounds like you had an older set that you then paired with a newer set?
     

  5. Reclusive781

    Reclusive781 Ancient Guru

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    The memory is bad memory if XMP is unstable? That's new.

    No, I can't RMA the memory.
     
  6. Reclusive781

    Reclusive781 Ancient Guru

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    https://www.teamgroupinc.com/en/pro...dr4/dark-z-alpha-ddr4-TDZAD432G4000HC18LDC01/

    I paired the 16GB and 32GB 3600MHz kits. The 32GB kit is 3 years old and the 16GB kit is 2 years old.

    I looked in CPU-Z and everything matched up except for DRAM manufacturer and obviously size before I did any changes in the bios as far as XMP.

    XMP has only ever been stable for me once when I had a x570 motherboard and 3700x. On the previous platform I had(i7-7700 and gigabyte mobo) XMP wasn't stable either.

    I've gone as far as running memtest to make sure the memory the stable even at bios defaults. I actually ran memtest86+ on the RAM I have now with XMP enabled for 8 passes on the 3700x and x570 motherboard. It passed all of them.

    *EDIT*

    It always passed testmem5.
     
    Last edited: Mar 30, 2024
  7. Reclusive781

    Reclusive781 Ancient Guru

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    Do I seriously need to answer that?
     
  8. KissSh0t

    KissSh0t Ancient Guru

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    That is the cause of the problem.
     
  9. Reclusive781

    Reclusive781 Ancient Guru

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    I could have sworn I made a thread about it here somewhere.
     
  10. Reclusive781

    Reclusive781 Ancient Guru

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  11. XMP is the max frequency the manufacturer promises for the kit.
    It can be unstable for other reasons ofc but 5800X3D should handle 3600 no probs.

    Not too long ago I RMA'd a G.Skill 32 GB set as it failed to be stable at 3600, new set worked fine.

    Ryzen is pickier with RAM though and could be the mixed and matched set is having trouble being stable at XMP frequency.

    If you want help, yes. If you can't be arsed to even list your specs then why should anyone bother helping you.

    If your fine with your RAM running at below spec then godspeed.
     
  12. Reclusive781

    Reclusive781 Ancient Guru

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    There's possibly a reason why it's in our profiles.

    Also it's not a promise, they're called 'advertised speeds' for a reason.

    I no longer have a motherboard that's has this RAM listed in it's QVL.
     
  13. KissSh0t

    KissSh0t Ancient Guru

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  14. RealNC

    RealNC Ancient Guru

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    XMP is only useful for matching RAM modules. If you mix and match, don't expect XMP to work. You need to use the timings of the lowest common denominator.

    To do that, you need to boot with each kit separately, but with XMP enabled, run https://zentimings.protonrom.com/ and note down all timings of both kits. Then disable XMP and add both kits. You should then manually configure the timings in a way that only the slowest ones are used. For example if one kit uses tCL 16 but the other tCL 18, you need to use 18.

    Also you can look at the BGS (Bank Group Swap) BIOS setting and change it to see if helps. "BGS Alt" should be used when running two modules, "BGS" when using four modules. "GDM" (Gear Down Mode) can be enabled to improve RAM compatibility. Make sure "Power Down Mode" is disabled.

    And even then, it might not be possible to reliably run at 3600MHz. Four modules, and especially if they're not matching kits, can be very problematic at anything above non-XMP stock spec.
     
  15. Reclusive781

    Reclusive781 Ancient Guru

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    I'm getting Reddit feelz.
     

  16. KissSh0t

    KissSh0t Ancient Guru

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    Don't feel bad man, just think of it as you did something incorrectly and now you learned something new because of it.

    Live and learn.
     
  17. Astyanax

    Astyanax Ancient Guru

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    Can be bad memory
    can be weak IMC
    can be noisy motherboard

    Memory clock enthusiasm has rarely been worth it.
     
    pegasus1 likes this.
  18. Reclusive781

    Reclusive781 Ancient Guru

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    I feel reddit'd.
     
  19. user1

    user1 Ancient Guru

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    I noticed on my b550 board the procodt is set incorrectly when running 4 dimms, dunno what motherboard you have but In my case I had to change it inorder to get speeds above 3200 to work at all. it was set really high by default. had to lower it to 48ohms. You can give changing that a try and see it it helps
     
  20. Reclusive781

    Reclusive781 Ancient Guru

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    Everything's running fine. :D
     

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