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2400Mhz ram down to 2133MHz

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  • 2400Mhz ram down to 2133MHz

    I'm running a 3770k on an Asrock z77 Extreme6 motherboard and recently bought 16GB of Gskill F3-2400C10-8GTX. It booted fine, but I was getting frequent application crashes and after some testing running blend in Prime95 I found I was getting rounding errors. I ran memtest and it reported no errors running at 2400 after an extended period of testing.

    I tried underclocking my ram back down to 2133 and the prime95 errors and application crashes are gone, but having spent the money on this very nice RAM, I'd like to try tightening the timings on these modules to at least get a bit lower latency while running at the underclocked speeds.

    Currently they are 10-12-12-31. I'm not particularly knowledgeable about what the timings are and what effect changing any of them will have, nor do I want ragged edge timings that are barely stable, just looking for some guidance on timings that will most likely work on these modules that will be an improvement over what they are now. I'm after the low hanging fruit.
    Last edited by Gryppen; 10-20-2014, 05:55 PM.

  • #2
    I am in a similar situation, i have the 8GB variant of the same RAM and 2400mhz caused frequent crashes. It is currently running at 2133mhz. I also tried increasing the CPU-NB voltage (increments of +0.1v) which did not help me but it might work for you.

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    • #3
      Your problem is probably mainboard related. Many ASrock Z77 models had trouble with higher speed memory, while the Z77 OC Formula was very well optimized for DDR3-2400+.

      At 2133 you can try timings of

      10-11-11-28
      (9-11-11-28)
      10-10-11-28
      9-10-11-28
      9-9-11-28
      9-9-10-28
      8-9-10-28

      How far you get with these depends upon dram voltage and ic quality. Happy testing^^
      Last edited by emissary42; 10-21-2014, 12:57 AM.
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