Windows 10: Changing L3 Cache

Discus and support Changing L3 Cache in Windows 10 Drivers and Hardware to solve the problem; Hey, I have viewed through all 14 pages in performance & maintenance tutorial's but I haven't found the thread for changing L3 cache in Windows 10... Discussion in 'Windows 10 Drivers and Hardware' started by AS185, Mar 5, 2018.

  1. AS185
    AS185 Win User

    Changing L3 Cache


    Hey,
    I have viewed through all 14 pages in performance & maintenance tutorial's but I haven't found the thread for changing L3 cache in Windows 10 environment. Anyone know how to change this? *Smile
    Sorry for making a thread where the same question was asked but I don't feel like viewing more than 512 pages *Tongue

    :)
     
    AS185, Mar 5, 2018
    #1
  2. DIEG657
    Dieg657 Win User

    FYI: SMT Configuration Error Affecting AMD Ryzen Processors in Windows

    That's very clear! Windows Sysinternals is seeing 136 MB of cache L2 + L3! So answer me ... who's Core iX now using 136 MB of cache L2 + L3? That's a clear question of unoptimized architeture, and yes, currently Windows 10 is not ready for Ryzen. That
    is very, very disappointing. I hope the Microsoft Developers Team solve this horrendous issue. If possible, for yesterday!
     
    Dieg657, Mar 5, 2018
    #2
  3. THRASHZONE
    ThrashZone Win User
    CPU usage is 100% (I7 2820QM 2.3 GHz 8MB L3 Cache)

    Probably would be better to show the processes running.
     
    ThrashZone, Mar 5, 2018
    #3
  4. LMILLER7
    LMiller7 Win User

    Changing L3 Cache

    The L3 cache is built into the CPU itself and it's size is an inherent characteristic. It cannot be changed.
     
    LMiller7, Mar 6, 2018
    #4
  5. AS185
    AS185 Win User
    Yes, that's right. I'm asking on how to change it in Windows 10? I know there was a way to manipulate in Win 7/8 through regedit. I doubt that, by default it's set to 32mb.
     
    AS185, Mar 6, 2018
    #5
  6. LMILLER7
    LMiller7 Win User
    The L3 cache is special memory built into the CPU package. There is no setting anywhere that can change it's size. Even Intel or AMD could not change this for an existing CPU.

    There is a registry setting referring to the L2 cache that is sometimes mentioned in Internet articles. Maybe that is what you are referring to. It's purpose was to tell Windows the size of the L2 cache which it used to make some minor optimizations. But the setting was only needed for some very old CPUs that are incapable of running Windows 10 anyway. In modern CPUs Windows is able to obtain this information from the CPU itself and does so routinely. The full size of the cache is always known to and used by the CPU.

    There were many Internet articles that got this wrong in various ways. I will not mention it's location here as it would serve no useful purpose and may cause confusion. I doubt that Windows 10 even reads the setting if it was crested.
     
    LMiller7, Mar 6, 2018
    #6
  7. AS185
    AS185 Win User
    Ok, well then I guess you can't change it. Thanks for clarifying *Smile
     
    AS185, Apr 5, 2018
    #7
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Changing L3 Cache

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