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Thread: P55-UD5 + i7-860 OC@4Ghz and BSOD 124




  1. #1
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    Default P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    Hello,
    I'm having trouble overclocking my i7-860 on my P55-UD5 to 4Ghz.

    I can get the system stable for a while, (running 50 intelburntest + a few hours of OCCT).

    But sometimes, when i'm encoding movies, my system crash with BSOD 124.

    I've read somewhere that most of the time it's related to the QPI/VTT voltage. But the thing is, for a 4Ghz OC, my QPI/VTT voltage is already set to 1.46v, which is quite high comparing to other people OCing this chip to 4Ghz i think.

    My setting are:
    BLCK : 181 X 22
    VCore : 1.3750 (with Load Line Calibration level 2)
    QPI/VTT : 1.46
    DRAM : 1.66
    CPU PLL : 1.96
    PCI bus : 103 Mhz

    HT enabled, all the energy saving features are set to off.

    If somebody can help me that would be much appreciated, as i've been trying to get this stable for more than a month now..

    thanks,

  2. #2
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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    it can be for too high a qpi voltage too,have you set system performance enhance to standard?? for 4ghz try 1.380000 or 1.400000 qpi also what bios? is it the latest one?
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  3. #3
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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    What speed are you running your Memory at? This is often not enough QPI/Vtt actually, don't be scared of it see my post here >>
    POST i7 CORE TEMPS HERE!!! - Page 5 - TweakTown Forums

    Some memory speeds or timings, and depending on your CPU itself, may need far more.

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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    Quote Originally Posted by wazza300 View Post
    it can be for too high a qpi voltage too,have you set system performance enhance to standard?? for 4ghz try 1.380000 or 1.400000 qpi also what bios? is it the latest one?
    Yeah, i got the latest bios (F5 i think)

    My Memory is Patriot 2X2GB 1600Mhz
    I'm running it @ 1433 or something close to that

    Memtest was running fine for 10hrs at that speed.

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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    50+ Intel Burn Test is WAY TO MUCH!! Sorry, forgot to add that in my previous reply

    You are going to kill your CPU very quickly this way.

    Ya 4GB at 14xxMhz should not need to awful much QPI, but you can never tell what the CPU itself may need though. What IOH voltage are you using? And what QPI and Uncore speeds?

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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    Quote Originally Posted by Lsdmeasap View Post
    50+ Intel Burn Test is WAY TO MUCH!! Sorry, forgot to add that in my previous reply

    You are going to kill your CPU very quickly this way.

    Ya 4GB at 14xxMhz should not need to awful much QPI, but you can never tell what the CPU itself may need though. What IOH voltage are you using? And what QPI and Uncore speeds?
    I don't have an IOH voltage since my CPU is a i7-8xx.

    But my qpi link is 3200Mhz and NB is 3600Mhz

    My QPI/VTT is @ 1.5 and it's been stable for a few days now.
    So from what you're saying, 1.5v is not too much?

  7. #7
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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    Sorry, I meant PCH Voltage.

    Ya, 1.5 is fine if that is what your CPU requires. Do try raising the PCH Voltage though and then see if you can lower the QPI/Vtt

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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    Quote Originally Posted by Lsdmeasap View Post
    Sorry, I meant PCH Voltage.

    Ya, 1.5 is fine if that is what your CPU requires. Do try raising the PCH Voltage though and then see if you can lower the QPI/Vtt
    Ok, now my PCH voltage is at stock speed (1.05)
    What is a safe value for the PCH?

    Could it really help me reduce my QPI\VTT ?

    Also, will my CPU be hotter if i increase the QPI/VTT since the memory controller is on the CPU chip?

    thanks,

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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    I would recommend PCH Voltage of 1.15-1.2, and yes it could help you lower QPI/Vtt if because you may have had to raise this higher because the PCH was set to low.

    Tinker around with them both, you will find the right combination. Yes, QPI/Vtt affects CPU temps, but no where near as much as Vcore does.

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    Default Re: P55-UD5 + i7-860 OC@4Ghz and BSOD 124

    Quote Originally Posted by Lsdmeasap View Post
    I would recommend PCH Voltage of 1.15-1.2, and yes it could help you lower QPI/Vtt if because you may have had to raise this higher because the PCH was set to low.

    Tinker around with them both, you will find the right combination. Yes, QPI/Vtt affects CPU temps, but no where near as much as Vcore does.
    Ok, so my system BSOD again, so i tested with PCH 1.6.
    Didn't help, i updated a few driver, (audio, chipset, lan), and my computer is still crashing, but since the drivers update, it gives me differerent errors (not BSOD 124 anymore)

    I don't know what to do anymore and i'm getting really pissed. I think i got some crappy hardware...

    At this point i think i will go buy a 1366 sockey mobo and a 920 DO CPU and throw my current system in the garbage, or maybe i'll try to sell it. Depends how i feel.

    i7-860 is really a bad candidate for OC, don't make the same mistake i did and go for i7-920 DO....

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