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Thread: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability




  1. #21
    Chike is offline Senior Member
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    Looks right for 3.6GHz so vcore is OK.
    Have you tried enabling C1E and EIST yet?

  2. #22
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    Quote Originally Posted by Chike View Post
    Looks right for 3.6GHz so vcore is OK.
    Have you tried enabling C1E and EIST yet?
    Yep, system seems to be stable with C1E and EIST enabled, I can see the volts and multiplier going up and down in Windows. Very happy with that result :)
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  3. #23
    Chike is offline Senior Member
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    Static tRead Value set to 10 by auto (a.k.a tRD, Performance Level in MemSet).
    9 Should be possible with no issues, maybe 8 with Timings 8-8-8-24.
    For memory benchmark I use MaxxMEM² - PreView.

  4. #24
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    Enabling Load Line Calibration has advantages and disadvantages.
    It usually doesn't need to be enabled to gain stability unless you're going for an extreme overclock. In a few threads with P45 overclocks, the 4.0+ GHz overclocks passed extended stability stress tests, only to randomly crash or reboot when at idle. Anandtech has several articles that go into great detail about the problems with voltage overshooting with LLC enabled. Vdroop is your friend, well sort of. ;)

    Your spreadsheet is excellent, but....
    a minor suggestion; include the ET6 and Memset values to the fields where you've used AUTO or NORMAL bios settings.
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  5. #25
    Chike is offline Senior Member
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    He may need LLC to be stable with normal vcore.

  6. #26
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    Quote Originally Posted by Chike View Post
    Static tRead Value set to 10 by auto (a.k.a tRD, Performance Level in MemSet).
    9 Should be possible with no issues, maybe 8 with Timings 8-8-8-24.
    For memory benchmark I use MaxxMEM² - PreView.
    Ok, I'll give the tighter memory timings a shot.
    Here is my current MaxxMEM scores:
    EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability-maxxmem-jpg

    I figured that LLC would be completely necessary at 3.6GHZ and stock voltage.

    Also updating the spreadsheet with more info and benchmarks, also filling in the AUTO/NORMAL bios settings, thanks for the suggestion.
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  7. #27
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    I ent to BIOS and set mem to 8 8 8 24 and 8 static tRead but it failed to boot. With 9 static tRead I got the below scores:
    EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability-combined3-jpg

    But I noticed quite a few other settings are way off like tWTR at 17 but should be 5 or 6.
    I'll got and fix those up now.
    EDIT: forgot that MemSet reports some settings differently. Anyway I changed the OtherTimings settings to those of the 666mhz memory preset. New results in next post.
    Last edited by pox67; 02-27-2011 at 07:59 AM.
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  8. #28
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    New results, for some reason Memory-Copy got slower.
    EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability-combined4-jpg

    What about Command Rate?
    I remember years a go it was a big deal to get this to 1T instead of 2T
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  9. #29
    Chike is offline Senior Member
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    Maybe the computer was not at complete idle?
    You may try and change command rate however manufacturar settings for XMP is 2.
    If you can lower Static tRead you may gain more than byt messing with advanced timings.

  10. #30
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    Default Re: EP45T-UD3P, Q9550 and CMZ8GX3M2A1600C9 - overclock and stability

    The computer wouldn't even boot to bios at Static tRead 8, setting it to 9 it has tested as stable.

    The new mem timings gave me about another Giggle Flops and 500 in PCMark Vantage. I am happy with that.

    Now some gaming for testing and then I'll save these settings to BIOS and try for 3.8GHZ. I wonder if I can get 3.8GHZ with these voltages...
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