OC to DDR4 Kingston Hyper Fury 2666 Mhz.  

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  1. Posts : 19,498
    W11+W11 Developer Insider + Linux
       #31

    Enrique said:
    What Name have your RAM, both of you? Mine is Kingston Hyper X Fury DDR4 2666MHz 16 GB (2 8 Dual Channel).
    And, Dear Count, your Chip is OC too? It seems to me so. Mine ins't.
    2x8 GB Kingston HyperX Predator DDR4 3600 MHz
    OC to DDR4 Kingston Hyper Fury 2666 Mhz.-image.png
    OC to DDR4 Kingston Hyper Fury 2666 Mhz.-image.png

    No CU is not OC-ed right now, relaying on PBO only although I have saved one OC setting saved in BIOS, 4.35GHz all core. Highest I can go with 100% stability.
      My Computers


  2. Posts : 5,872
    Windows 7 HP - Windows 10 Pro - Lubuntu
       #32

    XMP is a certified OC over a base memory speed.
    For what I know, all DDR4 memory have a base memory speed of 2400MHz and DDR3 have a a base memory speed of 1600MHz

    My DDR4 is rated as 2400MHz and under XMP it's overclock to 3000MHz.
    Over clock side effect is ALWAYS a over voltage that leads to higher temperatures.

    Don't use higher OC than the XMP certified OC. You may ruin it.
      My Computers


  3. Posts : 19,498
    W11+W11 Developer Insider + Linux
       #33

    Megahertz said:
    XMP is a certified OC over a base memory speed.
    For what I know, all DDR4 memory have a base memory speed of 2400MHz and DDR3 have a a base memory speed of 1600MHz

    My DDR4 is rated as 2400MHz and under XMP it's overclock to 3000MHz.
    Over clock side effect is ALWAYS a over voltage that leads to higher temperatures.

    Don't use higher OC than the XMP certified OC. You may ruin it.
    Depends on RAM in question. Most DDR4 starts at 2133 MHz, is certified to work up to XMP profile top frequency and only above that can be considered an OC.
    Most DDR3 starts at 1066MHz, SPD/XMP certified to what it can actually do. Max I have seen as 2400MHz but most go 1600-1866MHz.
    There's another component to memory and that's IMC (Internal Memory Controller) that is located in modern CPUs. It's frequency has to match RAM frequency. 2rd gen Ryzen is somewhat different, has an IO module separate from cores in same package and doesn't have to match RAM frequency, could be adjusted separately and it's made in 14nM technology while cores are 7nM.
    AMD calls it FCLK and some say that higher FCLK frequency helps with RAN performance for RAM 3000MHz or less, for any higher than that it has to match RAM's base frequency. For instance of you run RAM at 3000MHz, it's base frequency is 1500MHz because it's DDR (Double Data Rate).
    Double Data Rate means that it uses signal voltage as it rises and falls in the square wave which is at base frequency.
      My Computers


  4. Posts : 5,872
    Windows 7 HP - Windows 10 Pro - Lubuntu
       #34

    CountMike said:
    Most DDR4 starts at 2133 MHz, is certified to work up to XMP profile top frequency and only above that can be considered an OC.
    Mike, On my Gigabyte Z170, on the memory specifications it says that everything above 2400 MHz is considered OC

    Support for DDR4 3866(O.C.) / 3800(O.C.) / 3733(O.C.) / 3666(O.C.) / 3600(O.C.) / 3466(O.C.) / 3400(O.C.) / 3333(O.C.) / 3300(O.C.) / 3200(O.C.) / 3000(O.C.) / 2800(O.C.) / 2666(O.C.) / 2400 / 2133 MHz memory modules
      My Computers


 

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