PO3-640 Memory Upgrade Problems

Smiffy2000
Smiffy2000 Member Posts: 3 New User

Hi, the machine above came with 16Gb RAM that runs at 3200Mhz. (The RAM in the machine is Kingston HyperX Fury). I purchased 2x8Gb Kingston Fury Beast that should run at 3200Mhz but as soon as I install the machine recognises total of 32Gb but drops the frequency to 2400Mhz. Anyone offer any reason why this might be?

Best Answer

  • billsey
    billsey ACE Posts: 31,663 Trailblazer
    Answer ✓

    The stock memory is 3200 without XMP, the new memory is 3200 only with XMP and with a 2400 base frequency. You can mix regular and XMP in the system, but everything will run at the slower of the two base speeds, in this case 2400. You need either all XMP memory, with XMP enabled in the BIOS, or all non XMP memory.

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Answers

  • Jack22
    Jack22 ACE Posts: 3,733 Pathfinder
    Click on 'Yes' if the comment answers your question!
  • Smiffy2000
    Smiffy2000 Member Posts: 3 New User

    I looked at the article and it doesn't cover my issue. Have checked BIOS settings and they all seem good - the memory I purchsed seems to meet the requirements for the board. Why would the new memory cause all memory banks to slow down to 2400Mhz?

  • GotBanned
    GotBanned Member Posts: 615 Seasoned Specialist WiFi Icon
    edited September 2022

    Howdy!


    Try replacing the original RAM modules with the new ones. Does the new RAM run at 3200 when you use only them? If you mix RAM and use one old and one new module, what happens?

    The old RAM and new RAM, do they need the same voltages?

    If the new set of RAM works at advertised speed but not at "mixed mode" or all four slots populated, check BIOS if there's a way to increase RAM voltages. (Sometimes RAM needs 0.05 - 0.1v more to work properly.) Unfortunately your BIOS may be too limited to allow you to make any voltage adjustments. :(

  • William_mk2
    William_mk2 Ally Posts: 4,084

    @Smiffy2000


    Kindly go through the details which is captured from service manual designed for your computer.



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  • billsey
    billsey ACE Posts: 31,663 Trailblazer
    Answer ✓

    The stock memory is 3200 without XMP, the new memory is 3200 only with XMP and with a 2400 base frequency. You can mix regular and XMP in the system, but everything will run at the slower of the two base speeds, in this case 2400. You need either all XMP memory, with XMP enabled in the BIOS, or all non XMP memory.

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.