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Thread: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems




  1. #11
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Ok. Should I continue to tweak as previously or should I just load the XMP?
    Or load the XMP and tweak further?

  2. #12
    flyfisher is offline Member
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Load XMP then see if it's stable. Then tweak from there. Don't change too many things at once, you'll never know what you did that made it work (or not work)

  3. #13
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Good point!

    Raising QPI/VTT to 1.21V didn't do the trick..still gave me a few errors

    Just loaded the XMP and running memtest now..

    Will keep you posted! Thanks

  4. #14
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Update: With XMP loaded and QPI/VTT at 1.33V, I still get errors.

    Funnily errors aren't detected in the first pass but in subsequent ones.
    I'm running memtest with QPI/VTT at 1.35V atm...waiting on results

    I'm running out of ideas..could it be possible that one of sticks are bad and initial individual stick testing didn't detect it?

  5. #15
    flyfisher is offline Member
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    With 4 sticks of ram perhaps the CPU's memory controller just can't handle it. Since you tested each stick separately they all appear to be good, the errors crop up when all 4 are installed. Can you test with just two installed? If two work and four don't I would consider RMA on the CPU.

  6. #16
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Update:

    I decided to test the modules in the pairs they came in (ie. 2 sticks at a time)

    I left everything on auto (even DRAM voltage) and loaded the XMP profile.

    Both pairs passed memtest with flying colours.

    Now, I do I make it work with all 4 sticks? lol

    I thought it was highly unlikely for the CPU memory controller to stuff up. Maybe I need to play around with the settings more?

  7. #17
    flyfisher is offline Member
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Conventional wisdom is to raise the QPI/VTT. Maybe try 1.4 volts? Seems like a lot to me though.

  8. #18
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    Default Re: G.Skill F3-12800CL7-4GBRH and P55M-UD4: Intermittent Memory problems

    Update:

    updated BIOS to F6.
    Ran memtest with:

    QPI/VTT 1.35V
    DRAM Voltage 1.66V (1.648V actual)
    PCH 1.14V
    Performance Enhance on Extreme
    and with XMP loaded

    Still get an error at address 6874MB each time...

    This is giving me a headache..
    Last edited by d0rift; 12-21-2009 at 12:21 PM. Reason: wrong voltage

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