[Problem] RAM Upgrade of Clevo P751TM1-G (Z370 chipset): 64GB -> 96GB/128GB

Discussion in 'PC Hardware' started by usr_707, Sep 20, 2025.

  1. usr_707

    usr_707 MDL Novice

    Sep 20, 2025
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    #1 usr_707, Sep 20, 2025
    Last edited: Sep 21, 2025
  2. Carlos Detweiller

    Carlos Detweiller Emperor of Ice-Cream
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    Dec 21, 2012
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    What is the used OS exactly, including Edition?
     
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  3. usr_707

    usr_707 MDL Novice

    Sep 20, 2025
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    #3 usr_707, Sep 20, 2025
    Last edited: Sep 21, 2025
    (OP)
    It's Windows 7 Ultimate SP1 x64.
    But it's not an OS-dependent issue anyway.
    It should be something about BIOS. It limits the usable RAM space to 64GB and likely needs to be unlocked somehow to get the 128GB mapped (and it's capable of doing so).
     
  4. Carlos Detweiller

    Carlos Detweiller Emperor of Ice-Cream
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    Some older BIOS cannot address more than a certain amount of RAM. Might also be a limitation of the chipset (Northbridge AFAIK).

    Sometimes it works with enabled Memory Hole Remapping.
     
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  5. shhnedo

    shhnedo MDL Expert

    Mar 20, 2011
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    I don't think this machine was meant to go beyond 64GB of total ram capacity. Everywhere I look it says "max 64GB", even Crucial's ram upgrade website only gives you 2x 32GB as your top option.
     
  6. usr_707

    usr_707 MDL Novice

    Sep 20, 2025
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    This PC is absolutely capable of using up to 128GB RAM. But in order to achieve this, BIOS needs to be set / modified / 128GB-unlocked.
    I've seen community posts where people reported having Clevo P751TM1 / P775TM1 with 128GB RAM, as well as the info that BIOS needs to be modified / 128GB-unlocked somehow