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Thread: ι7 950, X58 UD7, Corsair Dominator GT 2000MHz

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    Unhappy ι7 950, X58 UD7, Corsair Dominator GT 2000MHz

    Does anybody know how can I set the intel's Xtreme profile for my DDR3 memory ?

    When I choose profile1 the pc doesn't boot...
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    I need to figure that out too.

    I can't help you with the settings, but the first thing people will want/need to know is what motherboard model you have, CPU, etc..

    If you fill in your system specs in the User CP section, it will help others help you.

  3. #3
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    CPU: i7 950
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    RAM: 3x2Gb Corsair Dominator GT - C8 2000MHz
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    My mb is Gigabyte X58 UD7 rev.2
    Cpu: i7 950
    Memory: 3x 2Gb Corsair Dominator GT C8 (2000MHz)
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    You will need to bump up your CPU vcore in order to achieve stability or at least boot your system, because 2000mhz strains your your i7's memory controller much more as compared to a set of 1600mhz memory hence the need to increase your CPU vcore.

    If your CPU vcore in BIOS is set to AUTO, change to something like 1.27v-1.30v and try work your way downwards until you achieve lowest possible stability, but remember to watch your temps.

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  6. #5
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    I've been playing around with it a bit, and like you, if I load the XMP profile off the memory modules, the system won't boot. My Asus motherboard reports it as "overclock failed" and prompts me to enter the setup menu.

    On my board, when I load the XMP profiles, it changes the the bclock and all the multipliers around to achieve the 2000mh ram setting. It also changes several voltage settings.
    The changes it makes are not desirable.

    I've had success with manually changing the multipliers to overclock the ram, but because of the I am running my bclock at 175 mhz, the available memory multipliers don't allow me to run the ram at 2000 mhz.
    I am currently running my ram at 1750 mhz because the next multiplier up puts it at 2100 mhz, which I haven't tried yet.

    My system is stable(9 hours of Prim95 blend test) at 4 Ghz (23x175@1.25625v), with my ram at 1750 mhz, so I don't want to mess with the ram anymore until I finish tinkering with CPU voltages, etc..

    From what I've seen on the web, my limited understanding is that getting XMP profiles to work is very hit and miss, and highly dependent on whether or not your motherboard has specific bios compatibility with your specific modules XMP profile.
    Without that specific compatibility, you will have to manually change the bios settings to get the ram to run at the desired speed, or as close to it as the relevant clock multipliers allow.

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    you could always drop the multi to 21 and increase the bclock

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    Quote Originally Posted by smduff View Post
    you could always drop the multi to 21 and increase the bclock
    But change memory multi....

    Look, you will not get 2000mhz out of you memory. Forget the extreme profile. You need to manually overclock the system.

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    Quote Originally Posted by Drdeath View Post
    But change memory multi....

    Look, you will not get 2000mhz out of you memory. Forget the extreme profile. You need to manually overclock the system.

    I am trying to manually overclock...

    So what is the minimum overclocking settings (multipliers, voltages) to get memory workinh at 2000 MHz ?
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    Disable turbo, c1e, performance on standard, disable all power saving features. Use 23 as multi. Set memory at around 1600mhz. Raise block slowly and find your max overclock at stock voltage DO NOT go for the gusto in 1 shot.

  13. #10
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    This online calculator is very handy for figuring out the multipliers to get the speeds you are after.
    http://icrontic.com/files/apps/nehalem-calc

    It would be well worth your while to research how all of the multipliers and voltage settings interact before you start making to many adjustments.

    Just don't expect a noticeable improvement in system performance outside of benchmark runs.

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    Overclock the system with 1600MHz on your ram. When you find your max overclock, work on memory frequencies and timings. The performance difference between lets say 2000MHz and 1600MHz is minimal, like .01 or .02%. You may be able to get 2000MHz but improbable. 2000MHz will lead to instability and most likely prohibit a good overclock. GL!

  15. #12
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    Thank you all for your replies!

    I managed to run stable at 1600MHz. I only raised the memory.

    But after all my reading to various forums I realised that I could saved some money if I knew that 1600MHz are enough!
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  16. #13
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    Quote Originally Posted by pcnw View Post
    Thank you all for your replies!

    I managed to run stable at 1600MHz. I only raised the memory.

    But after all my reading to various forums I realised that I could saved some money if I knew that 1600MHz are enough!
    I came to the same realization, could have saved $100, lol.

    I ended up with my ram running at 1750Mhz.
    If you want to have some more "fun", you can work on lowering the timings of the ram, and running a lower DRAM bus voltage.
    You should be able to get some pretty tight timings on those sticks running at 1600 Mhz.

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    Quote Originally Posted by pcnw View Post
    Thank you all for your replies!

    I managed to run stable at 1600MHz. I only raised the memory.

    But after all my reading to various forums I realised that I could saved some money if I knew that 1600MHz are enough!
    Dominator is good ram. Remember, at 1600MHz you may be able to run tighter timings.

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