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Thread: GA-X58A-UD9 Memory Problems (can't overclock)




  1. #1
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    Default GA-X58A-UD9 Memory Problems (can't overclock)

    System 1 components:
    Motherboard: GA-X58A-UD9 Rev 1 (F5h BIOS)
    CPU: Intel Core i7 930
    RAM: Kingston KHX2000C9AD3T1K3 - 6GB kit
    RAM Config: 3 Channel
    PSU: Thermaltake 850W
    Case: Antec Twelve Hundred

    System 2 Components:
    Motherboard: GA-P55A-UD3R Rev 1 (F9 BIOS)
    CPU: Intel Core i7 870
    RAM: Kingston KHX2000C9AD3T1K3 - 4GB kit
    RAM Config: 2 Channel
    PSU: Coolermaster 650W
    case: Coolermaster Centurion

    We have been unable to get System 1 to boot with the memory set to Profile 1 (2002MHz) (or even Profile 2). Even if we set the memory to standard (non-profile) and increase the memory clock to say 1600MHz, it will not boot reliably.

    The exact same memory type runs perfectly at 2004MHz on our System 2 motherboard.

    What is the problem with the X58 board?

  2. #2
    flyfisher is offline Member
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    Default Re: GA-X58A-UD9 Memory Problems (can't overclock)

    Is eveyrthing else at stock? If so I would say the problem is with the uncore. If the RAM is to run at 2000 Mhz on the X58, then uncore has to be 4000 MHz. This requires high QPI volts. Even with Profile 2 at 1866 Mhz, uncore is 3732, and still requires a fairly high QPI voltage. Since it won't boot with either profile you obviously have no way of knowing what QPI voltage the XMP profile is setting. And looking at the Kingston website, it lists everything but the QPI voltage for the two profiles. I would set memory to auto, it should default to 1066 Mhz, then load a profile, but set QPI volts to 1.35 - 1.4, save, reboot, and hopefully it will work.

    P55 has totally different rquirements than X58. Uncore is locked at 18x the Bclk, and does not have to be 2x the memory. That is why the memory worked on the P55.

  3. #3
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    Default Re: GA-X58A-UD9 Memory Problems (can't overclock)

    Thank you very much for trying to help, but when XMP Profile 1 is selected, the BIOS automatically sets the UnCore frequency to 4004MHz, the DDR voltage to 1.65V and the QPI voltage to 1.7 volts.

    We can get the system to run at 1600MHz by simply setting the memory clock mulitplier to 12.0 but this setting will occassionally not boot.

    Best we have been able to achieve so far is stable operation at 1600MHz by manually setting the DDR voltage to 1.64V, the QPI voltage to 1.34V and setting all of the RAM timings manually.

    It is frustrating that we cannot run the system at it's full potential and also that there is no "Clear CMOS" jumper on the motherboard. I have lost count of how many times we have had to pull out and reinsert the CMOS battery. May I suggest that Gigabyte put a Clear CMOS pushbutton switch on future high-end motherboards such as this.

  4. #4
    flyfisher is offline Member
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    Default Re: GA-X58A-UD9 Memory Problems (can't overclock)

    Quote Originally Posted by Ray D View Post
    It is frustrating that we cannot run the system at it's full potential and also that there is no "Clear CMOS" jumper on the motherboard. I have lost count of how many times we have had to pull out and reinsert the CMOS battery. May I suggest that Gigabyte put a Clear CMOS pushbutton switch on future high-end motherboards such as this.
    Look at your manual, the clear CMOS button is on the back panel between the yellow USB/eSATA port and the orange coaxial audio jack. 1.7 QPI volts is excessive and certainly out of Intel specs, which is 1.35 max. Too much QPI voltage is as bad as not enough. As I said, the uncore must be 2x the memory so if you want to run at 2000 Mhz your uncore must be 4000 Mhz. But I don't think it would take 1.7 volts to do that, which is why I suggested 1.35-1.4 volts. As a point of reference, my GSkills are DDR3 1600 but will run much higher. I tried 182x22 with memory at 1820, but it required 1.395 QPI voltage to be stable because of the higher uncore. I settled on 211x19, DDR3 1688 with 1.295 QPI. In reality there is no discernible difference in everyday use between 1600 and 2000.

    Edit: add pic.
    Last edited by flyfisher; 01-30-2011 at 03:20 AM.

  5. #5
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    Default Re: GA-X58A-UD9 Memory Problems (can't overclock)

    best to manually set the ram rather than use xmp,2000mhz will be tricky,tried 1800 or 1866? you can try with 1.3-1.45v for 2000mhz,uncore freq can be 2x,2x+1 or 2x+2 the memory multiplier,remember p55 is dual channel as aposed to tri channel so would probably nerd less voltage ect,try using latest bios too
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    Default Re: GA-X58A-UD9 Memory Problems (can't overclock)

    Ray D, I have the same MOBO (F5i BIOS) - different CPU and RAM - I have no problem running 24gigs @ 2000MHz. I manually set all RAM timings (don't use XMP - overvolts). CPU must be stable before you try to run RAM @ 2000MHz. Even then it's not easy but possible. I'm not familiar with your CPU or RAM so somebody else will have help you with that. This is a great MOBO once you learn what it likes and doesn't like. Very easy to OC and get stable. Thanks wibujo
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  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-X58A-UD9 Memory Problems (can't overclock)

    2000Mhz is not ideal for your CPU and 24/7 use, you will have much better luck running 1600-1900 with tighter timings.

    Do you want some settings for somewhere in that range, if so let me know?

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