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Memory Read Uncached Performance

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  • Memory Read Uncached Performance

    haha, yes! First I want to say that I love passmark! I use this site everyday and it's very helpful for market decisions : )

    I normally just use it for CPU info but I started getting into the ram side.

    So after doing memory benchmark - I noticed my Memory Read Uncached is low but everything else checks out pretty good.
    I am wondering if people are using just one stick of ram to get high reads, but I got quad channel, so it cant be!

    CPU: 7820X @ 4.5ghz (I can get it to 4.7 and it scores 2700! but I want cooler temps - btw did I ever say I love passmark?)
    CPU Cache @ 3.3Ghz
    Mainboard: Asus ROG Rampage VI APEX (this motherboard is amazing btw)
    Memory: 32GB 8x4 F4-3600C16-8GTZSW (Single Rank) @ 3735/1867.7 15-15-15-34 tRFC655 2T (amazing! 1.37v)

    My Memory write is 14056 , but my read uncached is 12484 - is there any way to get this up? I'm seeing people hit like 20,000MB/s and im wondering how?

    Also my Latency is about 25 and I see some people hitting 16 - I thought my ram is good! lol they must be running super low timings like 10 or 14cl.

    So I just want insight on the read uncached performance really, anyone have any tips?

    PS: Thank you and great site! keep up the good work! Happy New Year!

  • #2
    The machines with the highest read uncached performance tend to be those that have the CPUs with the highest single thread performance scores. So the i7-8086K and i7-7700K combined with something like G Skill Intl F4-4266C19.


    • #3
      Thanks for the feedback - So I get 7700K single thread performance @ 4.5ghz and 8700k @ 4.7 - What I did to improve my speeds was lower the trfc to 400 (default was set to 630ish?)

      Now I am hitting 15,500 MB/s read/write for uncached and systems in the 95% for memory. : )

      Happy with it for now - Might try getting the memory to 4000mhz @ 15/16CL with 1.5v in the future and test again.