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Overclocking Problem with i7-920

Discussion in 'Hardware' started by SilveR_172, 17 Jan 2013.

  1. SilveR_172

    SilveR_172 Member

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    Hi guys,

    Seem to be having some problems taking my 920 to the magical 4Ghz,

    Set up:-
    Asus Rampage 2 Ext 1136
    Intel i7-920
    Mushkin DDR3 1600
    Cooling Fully custom water-cooled Nb/Sb and CPU loop
    750 OCZ Faitality

    Right so i seem to have it intel burn test stable at 4Gbz @ 1.35 HTOff , Im going for HT on! =)

    Im looking for a 24/7 stable Overclock (with speedstep)


    Here is where im at , at the moment anything wrong and needs changing point it out , On the Current set up ive noticed that when stress testing its taken around 40seconds to get to 100% Stress generally lingers round 99.7 Upwards to 99.9% then when i do get it to 100% it will do one loop and not jump back on the 2nd one , No blue screen Just Powers off

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    Thanks
     
  2. rollo

    rollo Well-Known Member

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    Try going 21 x 190 or something similar. Not every chip/ mobo likes 20 multi 200 bus.

    Every CPU usually has a blackspot where no matter the voltage it won't work but if you up the speed using a dif multi or bus it may hit the overclock you want.

    Trial and error.

    1.4v is a pretty high voltage. My i7950 does 4ghz on 1.275 vcore for an example i know every chip is dif but still yours seems a touch high.
     
  3. SilveR_172

    SilveR_172 Member

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    Ahh thanks is that with HT offor on , your the 2nd person thats told me that lol :p
    Ill try at same voltage with the 21X190 config see how it goes and if it blue screen ill go more to your voltage
     
  4. wiby645

    wiby645 Member

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    hi, i dont really overclock much..... but i bought my i7 920 and rampage iii formula from a guy here on bit.
    mabye this will help you/mabye not

    http://forums.bit-tech.net/showthread.php?t=211550

    might be worth a pm to see if he still has the pics that have gone dead, the pics were of his bios set up.
     
  5. Arghnews

    Arghnews New Member

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    My i7-950 runs at 22 x 183 but the base clock doesn't play ball if I go higher so multi up instead. 1.24V.
     
  6. LennyRhys

    LennyRhys Oink!

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    Some of your voltages are too high - for example, ICH doesn't need to be at 1.2v, nor does IOH. Try leaving ICH at 1.1v or Auto, and bring IOH back to 1.14v or thereabouts. It may not even need that. QPI/DRAM Core Voltage shouldn't need to be as high as 1.4v, but it depends what speed your memory and uncore are running at. CPU PLL is also unnecessarily high - bring it back to 1.8v and don't tweak it unless you need to.

    One of the biggest causes of instability is that people just play with voltages rather than tweak them methodically. My system is stable at 4.2GHz (191x22, HT on) and the only voltages that required any tweaking were CPU (1.35v) and QPI (1.3v), but that did take a fair bit of time to ascertain.

    It depends what stepping your CPU is as the old 920s were difficult to get to 4GHz and did require high vcore, perhaps 1.4v and sometimes even more; but in reality you shouldn't need to touch any voltages other than CPU and QPI to start with.

    Ram should always be set to 1.65v irrespective of what it's running at.

    Try starting from scratch again with 191x21, and set your memory/uncore to 1528/3056 and try CPU 1.4v and QPI 1.35v. You shouldn't need to touch anything else. If that fails, try bumping the CPU to 1.4125v; and if that fails, try 1.425v, and so on. If it keeps failing, go back to 1.4v and try bumping QPI to 1.3625v and keep increasing it until you get it stable. This is the trial-and-error method that will yield results...eventually.
     
  7. KeTZz

    KeTZz Member

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    Ive had mine stable for years at 4Ghz 191x21 with turbo on vcore 1.2 leave your memory and everything on auto for now but if you can drop the memory voltage down to about 1.4 if your on water this shouldn't be a problem with HT on
     
  8. Pookie

    Pookie So this is permanence, love's shattered pride.

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    When I used to run my 920 @ 4Ghz I needed a CPU PLL of 1.9v. Infact it may have been just over that but not by much.
     
  9. SilveR_172

    SilveR_172 Member

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    Thanks guys im going to start over again starting with a low overclock with HT on and see where i can go with that
     
  10. xxxsonic1971

    xxxsonic1971 W.O.T xxxsonic1971

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    My old 920 didn't like the QPI speed set to auto, i used to set it manually, it wouldn't like going over 3500 without lots of volts.
     
  11. SilveR_172

    SilveR_172 Member

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    Ive just got a really good guide followed it but is it possible for a chip to have a problem with a Base clock ?

    i get to 179/180 Bclock it just seems to freeze after about 40 seconds to 10 mins of been in burn test im currently upping the voltage to try stop this , any other ideas ? up the bclock more and see if i overcome it ?
     
  12. LennyRhys

    LennyRhys Oink!

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    Chip shouldn't have a probelm with BCLK until north of 200MHz. Don't forget what your memory is at... 9 times out of 10, it's the memory or uncore causing the instability. And as you up your BCLK you will need to increase QPI voltage anyway. It could just be that your chip is a sucker and doesn't overclock well - a good guide will tell you that. ;)
     

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