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F3-2133C9D-16GXH+ Gigabyte GA-Z68MA-D2H-B3 + i7-2600K

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  • F3-2133C9D-16GXH+ Gigabyte GA-Z68MA-D2H-B3 + i7-2600K

    F3-2133C9D-16GXH + Gigabyte GA-Z68MA-D2H-B3 + i7-2600K
    Bios version F10 and tested on U1C (UEFI) both work.
    XMP1 or XMP2 profiles did NOT work for me. I could not get memory frequency higher than 1600 without customized memory settings with this hardware setup.
    Basically i put in some really conservative numbers everywhere to start and then i put each setting back to the lower of XMP or Auto Default until it wouldnt start up anymore. I eventually found the culprit.

    In order to get to 2134 memory freq w/o changing voltages and with tighter timings than rated 9-11-11/31:

    Use white ram slots furthest from CPU (older 8gig model blue Ripjaws in pic)


    Key settings:
    These are probably main cause that XMP doesn't work because these are way off and the reason you might not get past 1600 memory freq
    tRFC = 235 for me (start at 255MAX and work down) 225 for me caused a very bad bios crash (basically the bios automatically revert to a "Safe" setting, which would be too low tRFC for even a lower memory freq to get even get back into the bios to correct it) and I had to basically reset bios and unplug everything to get the comp to turn on again. This refresh rate increased quite a bit coming from a comparable Gskill 8gig DDR3 pair.
    CMD Rate = 2




    Last edited by jh4db536; 09-04-2015, 01:17 PM.
    http://valid.canardpc.com/cache/banner/1421077.png

  • #2
    9-11-11-31-42-7-8-16-28-9-255-8-24-2

    Try those timings and let me know how it goes.

    Comment


    • #3
      At this point the ram is working as advertised (or better) and the bottleneck is my motherboard. I'm going to leave it alone since everything is working okay.

      I'm positive those settings will work if tRFC is 255 and the others are 9_11_11_2T. The tRFC is highly sensitive and the computer will completely fail if set too low; higher is safer. When I attempted to clamp the timings down to 9_10_10 it would start up fine but not pass memtest86. So I think I got 99 percent of the performance possible given I'm using a regular motherboard that's not geared for OC
      Thanks,
      Last edited by jh4db536; 09-04-2015, 06:43 PM.
      http://valid.canardpc.com/cache/banner/1421077.png

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