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Thread: HyperX KHX12800D3K2/4G

  1. #1
    Join Date
    Jul 2009

    Default HyperX KHX12800D3K2/4G


    I am experiencing problems with getting my 2 RAM modules to run at 1600Mhz. As I understand the specifications the voltage should be set somewhere in between 1,7v - 1,9v in order to get to 1600Mhz at 9,9,9,27 timings, something that I seem not be able to obtain.

    The first thing I've noticed is that i cant set voltage above 1,8v. If I put 1,85v or above even with modules running at 200x6,66=1333Mhz the system won't post.

    Next I tryed to determine what maximum voltage that I can give to RAM where they are still stable and found that the highest voltage that wont give me errors in memtest86+ is 1,7v, with modules running at 200x6,66=1333Mhz. At 1,75v I start to get errors on the 7th test in memtest86+ program.

    Finally I increased FBS and came up that the highest speed that was 215x6,66=1432Mhz.

    So my question is about your thoughts on what might be causing this rather bad performance, and wether I can do something to correct it.

    Here is the list of my components:

    Gigabyte MA790XT-UD4P (F4g)
    AMD Phenom II 720BE
    Kingston DDR3 HyperX 1600MHz 4GB (9,9,9,27)
    Gainward GTS250 1024Mb
    Samsung Spinpoint 2x160Gb (Raid0)
    Western Digital 500Gb
    Antec Phantom Power 500W

  2. #2
    Join Date
    Apr 2009

    Default Re: HyperX KHX12800D3K2/4G
    I noticed that optimized memory for the Phenom AM3 is low voltage @ 1.65V Kingstons MA790XT-UD4P memory recomendation and Gigabytes MA790XT-UD4P motherboard QVL below neather one list that memory for that motherboard. I believe you will have to use it at a lower frequency than DDR1600Mhz @ 1.7v or less for now.
    Kingston Technology Company - Kingston Memory Search - Search Results for:
    Kingston Technology Company - Memory Search - Modelsinfo
    Last edited by artdrivers; 08-02-2009 at 04:15 AM.
    Phenom II 945 @ 3.2Ghz w/Thermaltake Big Typhoon Pro 14 CPU Cooler
    Gigabyte GA-MA78GM-S2H rev.1.1 F11
    Sapphire 3870HD / 100225L / 512MB / ddr4
    4GB / Kingston / KHX8500D2K2/2GN / 5-5-5-18 / 1066Mhz
    (2) WD Caviar / WD2500AAKS/ 250GB in SATA RAID-0
    (1) WD Caviar / WD2500AAKS/ 250GB in SATA AHCI
    (2) IDE's 1 8XdualDVDRW 1 52x32x52x CDRW
    Antec /Neo HE550 / 550W
    Mid size ATX case with show through panel
    2) 80x80 front fans (1) 120x120 rear fan and small nb fan
    Microsoft comfort curve USB keyboard 2000 ver.1.0
    Logitech G500 USB mouse
    Monitor: CMV937A
    7.1+2 Channel High Definition ALC889A
    Dual boot Windows 7 32bit home & Windows 7 64bit home

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