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Thread: P55-UD4, i5 and Corsair Dominatord DDR3 Cl9 1600Mhz

  1. #1
    Join Date
    Dec 2009
    Bucharest, Romania

    Default P55-UD4, i5 and Corsair Dominatord DDR3 Cl9 1600Mhz

    Hello all, I'm new here so i don't know if I post this in the right place.

    So, I have just built my new 1156 platform and I'm using the Corsair Dominator DDR3 CL9 (TW3X4G1600C9D), Gigabyte UD4 and i5 cpu.

    I'm having problems overclocking my memory @ 1600Mhz. I tried leaving the timings on auto and setting the dram voltage to 1.8V but my system is still unstable.

    Can anyone help me? I need the right settings for them (timings, QPI/VTT, and the DRAM voltage).
    Also, i can't find the XMP option in my BIOS (F5).

    Thanks in advance!

    Last edited by Hazer; 12-21-2009 at 05:28 AM.

  2. #2
    Join Date
    Apr 2009
    J'Habite En Angleterre

    Default Re: P55-UD4, i5 and Corsair Dominatord DDR3 Cl9 1600Mhz

    I can't help regards QPI/VTT as I have only built a couple of i5 machines, not enough for me to feel confident recommending voltages. I would exercise caution with your VDIM though. Try to keep it at or under 1.66V. i5/i7 can be damaged easily by high VDIMM and an incorrect gap between VDIMM and QPI/VTT. Keep the difference between QPI/VTT and VDIMM to within 0.5V of each other.

    To clear up why you have no XMP setting, this is because your RAM doesn't seem to have one.

    Note that your RAM is actually marketed as "For Phenom II". This is because Core i5.i7 RAM is required to be able to run at its rated speed with 1.65V or less. These are termed "Low voltage kits". As mentioned, running much more VDIMM can be dangerous and it's possible the CPU could be damaged. This is because the memory controller is now integrated ito the CPU and is sensitive to RAM voltages.

    If I were you I would be using the standard 9-9-9-24 timings at 1600 with the smalest amount of voltage possible. If you can't get the voltage down to 1.7-1.75V I'd reduce speed until you can.

    It seems that unfortunately you may have made the wrong RAM choice sadly. Here is a link to the Corsair page, stating the intended usage for Phenom II CPU's that can handle more VDIMM comfortably: Welcome to Corsair :: Phenom II Memory

    This kit would be more apripriate for i5/i7 systems: Welcome to Corsair :: Corsair DDR3 Memory for Intel Core i5 You will notice that these i5 compatible modules will run on between 1.5 and 1.65V in their specs.

    ***EDIT*** These are the correct Dual Channel DHX modules for i5/i7, running on 1.65V.
    Last edited by Psycho101; 12-21-2009 at 08:00 AM.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

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