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Thread: ED45-UD3p with 8400 Dual Core overclock help! :)




  1. #261
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    Testing log so far:
    489 x 9
    CPU PLL 1.59, VCore 1.37500,MCH Core 1.240, CPU Ref Auto, VTT 1.240

    At these settings, Prime95 failed

    Switched to... MCH Reference .072
    Prime 95: Fail

    With MCH Reference still at .072, I tried...

    CPU Reference 0.78500:
    Prime 95: Fail

    CPU Reference: 0.80000:
    Prime 95: Fail

    CPU Reference: 0.81500:
    Prime 95: Fail

    CPU Reference: 0.83000:
    Prime 95: Fail

    CPU Reference: 0.84500:
    Prime 95: Fail

    CPU Reference: 0.86000:
    Prime 95: Fail

    (I had gone this high because it seemed that Prime95 was taking more time to fail then previously).

    CPU Reference: 0.74500:
    Prime 95: Fail

    I'm going to continue testing lower CPU Reference, and then the same with MCH Reference at 0.74. If that still fails, I will try one click higher MCH Core, then 200 ps CPU clock skew, as per Chike.

  2. #262
    Chike is offline Senior Member
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    If this won't do it, higher VTT. But before you try higher VTT, run small FFT 10 minutes/test for two hours, maybe it's vcore that is needed.

  3. #263
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    what,...more power you say,..

    Crykey...
    GAEP45 UD3P rev1.1
    Intel E8400 @4.2Ghz
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  4. #264
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    profJim is online now Chief Munchkin + moderator
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    But captain, the flux capacitor's can't take it any more......

  5. #265
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    Hiya Jake,.

    I've been doing things differently under Prof Jim but and haven't gone to the extent that you have (yet) but VTT won for me,..check my latest post..I'm now working on passing prime (specific) FFt's. I can't say it's the right move it was a thought of mine that so far is working!
    GAEP45 UD3P rev1.1
    Intel E8400 @4.2Ghz
    Corsair Cl4 DDr2 800
    Ati 4890
    Bequite 670watt
    Westerndigital Black 500gb

  6. #266
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    Quote Originally Posted by Deafty View Post
    Hiya Jake,.

    I've been doing things differently under Prof Jim but and haven't gone to the extent that you have (yet) but VTT won for me,..check my latest post..I'm now working on passing prime (specific) FFt's. I can't say it's the right move it was a thought of mine that so far is working!
    Nicely done, and thanks for the tip

    I did a lot of playing with the references last night. So far I haven't gotten it fully worked out. In short, I just finished completing all tests as per advised. When I left off, I had just increased VCore one click.

    It's taken me a lot of time so far because I experimented with a wide range of CPU/MCH references (more so than was probably necessary), mostly for my own curiosity. I will update this post with all test results when I get home.

  7. #267
    Chike is offline Senior Member
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    Have you ran small FFT yet Jake? All thereferences in the world won't help if vcore is needed.

  8. #268
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    Quote Originally Posted by Chike View Post
    Have you ran small FFT yet Jake? All thereferences in the world won't help if vcore is needed.
    Negatory - I just got to the end of these instructions last night:

    Quote Originally Posted by Chike View Post
    If 1.24v 0.74/0.72 MCH reference with all CPU references don't do it try one click higher MCH Core, then 200ps CPU clock skew.

    So now I'm here:

    Quote Originally Posted by Chike View Post
    If this won't do it, higher VTT. But before you try higher VTT, run small FFT 10 minutes/test for two hours, maybe it's vcore that is needed.
    Which I'll do when I get home today. Increase VCore as needed until short FFT passes for 2 hours? After that, if long fft still doesn't pass, I will try 1 click higher VTT (1.26), then start playing with the references.

  9. #269
    Chike is offline Senior Member
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    Yes small FFT and vcore, what is vcore at now?

  10. #270
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    Default Re: ED45-UD3p with 8400 Dual Core overclock help! :)

    Had just clicked it up one notch above 1.37500 to 1.38125. I had originally arrived at 1.37500 VCore by clicking it up until IBT finally passed, so it would make sense that I'm at the low end right of what is marginal right now.

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