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Thread: Need some help with i7 920 OC

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    Default Need some help with i7 920 OC

    Hello guys, i need your input regarding i7 920 OC at 4.0gh. Glad to be here in the forums by the way

    This is my system
    i7 920 D0
    Rampage 2 Extreme
    Corsair Dominator 3x2 1600mhz
    True Spirit 140 POWER Air Cooler


    I used to be stable at 3.5Ghz but i decided to bump the OC to 4.0GHZ

    I Tried these settings
    CPU Ratio Settings
    CPU Ratio 20
    BCLK Freq 200
    PCI-E Freq
    DRAM DDR3 1603 8-8-8-24
    UCLK AUTO
    CPU Differential Amplitude AUTO
    CPU Voltage 1.275
    CPU PLL Voltage AUTO
    QPI/DRAM Core Voltage 1.275
    DRAM Buss Voltage 1.64
    CPU Spread Spectrum
    DISABLED
    PCIE Spread Spectrum DISABLED

    It has been going for over 40 minutes now in prime 95 without errors. Earlier i tried on lower voltage but i got an error. I am not knowledgeable about OCing this particular cpu (i was just able to do a stable 3.5ghz which is not very hard, oh and by the way i was able to get the stable 3.5 with 1.175 voltage) so id like to ask if there are any safer settings for less temperatures that i could try perhaps? I also saw people trying cpu ratio 21 or some other settings. I just need your advice and opinions on this.

    Thank you very much!

    Last edited by ELRampagious; 28-05-2014 at 17:29.

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    Default Re: Need some help with i7 920 OC

    Welcome to PureOC! Happy you stopped in. I am sure one of the Intel lovers will be around shortly to assist with your question. I only know the newer Intel gear as I have been using AMD since the dawn of time itself. Until recently when I for force at gun point to buy Intel gear to test with. hahaha
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    Default Re: Need some help with i7 920 OC

    Quote Originally Posted by Cyberburnout View Post
    Welcome to PureOC! Happy you stopped in. I am sure one of the Intel lovers will be around shortly to assist with your question. I only know the newer Intel gear as I have been using AMD since the dawn of time itself. Until recently when I for force at gun point to buy Intel gear to test with. hahaha
    Thank you good to be here

    PS: Prime95 running for almost 2 hours now, no errors yet. If you need actual pictures of my BIOS i can provide once the testing is done, in order to get some advice and change my settings depending on what you guys suggest to me. Also, my temps are not very low, im running at around 80c 100% load (went up to 84c for a moment but for the most part it has been running at 78-80c), my ambient temps are high 28c because summer is here :S).

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    Default Re: Need some help with i7 920 OC

    Ok so after 2 hours my 3rd worker stopped, fatal error: rounding was 0.5 expected less than 0.4?

    The rest are still going though. Im using 8 workers.

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    Default Re: Need some help with i7 920 OC

    Honestly if it can take a beating like that it should be stable for regular usage. Normal day to day also shouldn't get that hot even playing games. So i say give it a test drive. Play a game surf the net, stream so movies or music. Whatever it is you use it for. Run a game benchmark see if it can finish it. I personally never stress my system that long because im not going for some official overclocking entry. Others may disagree but hey if it can do what i need with crashing or hanging then its a good oc.
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    Default Re: Need some help with i7 920 OC

    Quote Originally Posted by Cyberburnout View Post
    Honestly if it can take a beating like that it should be stable for regular usage. Normal day to day also shouldn't get that hot even playing games. So i say give it a test drive. Play a game surf the net, stream so movies or music. Whatever it is you use it for. Run a game benchmark see if it can finish it. I personally never stress my system that long because im not going for some official overclocking entry. Others may disagree but hey if it can do what i need with crashing or hanging then its a good oc.
    Thanks for the response, the system is running stable now at 4.0gh with the settings i posted earlier. I have had no problems in any applications and my Sony Vegas Rendering was very fast without any problems (cpu usage 60-100% for half an hour during rendering), with temperatures from 55 to 70c. So, so far the only indication i had was the error on the 3rd worker during prime 95, though the system did not get a blue screen and the other 7 workers just continued. Im not sure what it means but i think it is not so bad, of course if there is anyone here with some advice as to how i could make it more stable, please share

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    Default Re: Need some help with i7 920 OC

    Quote Originally Posted by ELRampagious View Post
    Thanks for the response, the system is running stable now at 4.0gh with the settings i posted earlier. I have had no problems in any applications and my Sony Vegas Rendering was very fast without any problems (cpu usage 60-100% for half an hour during rendering), with temperatures from 55 to 70c. So, so far the only indication i had was the error on the 3rd worker during prime 95, though the system did not get a blue screen and the other 7 workers just continued. Im not sure what it means but i think it is not so bad, of course if there is anyone here with some advice as to how i could make it more stable, please share
    If even one Worker stops, then your overclock is not stable. Yes, the other Workers may continue to run, but the test has failed. It means further tuning and testing is needed.

    Also, running Prime 95 for only a couple of hours is pretty pointless since if it does succeed it proves nothing at all. Prime 95 is a "long term" test that is best done only after quicker tests are successful; see below. The recommended duration for Prime 95 is a minimum of eight (8) hours. However, you can settle for a "good enough" test of around half a dozen hours. Choosing that shorter test length does not demonstrate system stability, but does at least give confidence that general workloads will be less likely to cause the overclock to crash the system ... although note that if a crash occurs later on (for example while gaming) and is seemingly inexplicable, the reason for it will simply be that the overclock was never fully stabilized. And yes, you can even do fewer than six (6) hours - just realize that the shorter the duration, the less confidence there is in system stability and the higher the likelihood that you'll eventually experience a crash because of an overclock that was never fully tuned and tested.

    For initial testing of an overclock use the Intel Burn Test (IBT) or LinX, instead of Prime 95. First try to achieve an overclock that will successfully complete a test run of ten (10) passes. Once you can achieve that, go for twenty (20) passes if you want extra confidence. Then switch to Prime 95 testing.

    Successfully testing with both IBT/LinX and Prime 95 is important because they stress an overclocked system in different ways. Which means that either one of them might succeed, whereas the other fails - and if that happens it indicates an unstable overclock. Succeeding with both will indicate a good overclock.
    Last edited by ZeroChill; 29-05-2014 at 22:55.
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    Default Re: Need some help with i7 920 OC

    I suggest you read the Core i7 4Ghz Club & Overclocking Guide. It will walk you through the steps for achieving a viable overclock, which is best done methodically rather than just plugging in some numbers and hoping for stability. You may also benefit from reading the recent instruction that GrumpyDaddy gave to another overclocker here: advice on o'clocking this i7 extreme.
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    Default Re: Need some help with i7 920 OC

    Thanks a lot for the responses.

    I ran intel burn test 10 tests on standard and High difficulty without problems. But on very high stress 20 tests it did not pass.

    Just want to know what i could do to make it more stable, that's all..
    Last edited by ELRampagious; 31-05-2014 at 09:17.

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    Default Re: Need some help with i7 920 OC

    Quote Originally Posted by ELRampagious View Post
    Just want to know what i could do to make it more stable, that's all..
    The correct thing to do is to study and follow an overclocking guide. GrumpyDaddy recently pointed a new overclocker at this one: 3 Step Overclocking Guide ? Bloomfield and Gulftown | TechREACTION. I have a few others bookmarked, but that one appears to be clear and concise enough to be a better starting point for you. Note that the author does not refer to Prime 95, but should have done so - perhaps he was unaware of its importance in confirming overclock stability.

    If you are lucky, perhaps GrumpyDaddy will notice your post and offer assistance to you as well; whereas I am not currently in a position to teach you the basics or walk you through the process.

    - * -

    A shortcut approach, which may very well be a failure since you have not validated the key settings in your BIOS, would be to (1) use your current values you listed above as a basis; (2) set Turbo Mode, C1E Support, SpeedStep, A20M, CPU TM, and C-State to "Disabled"; (3) set HyperThreading [HT] to "Enabled"; (4) set Load-Line Calibration to "Enabled"; (5) set CPU Differential Amplitude to 800mV; then (6) step-by-step increase CPU Voltage (VCore) by +.025V and test with IBT/LinX for each increment. Work towards a successful run of ten (10) passes / loops, then repeat the test again to confirm. For extra confidence do twenty (20). Afterwards, switch to Prime 95.

    Select "Maximum" Stress Level for each test if you use IBT. Set Memory to "All" for each test if you use LinX.

    Carefully watch your Temperatures and avoid going over 85/86 C to minimize heat stress on your CPU; yes, you can go higher but I consider that risky. And of course lower is better, so if you see no more than low to mid 70s while testing then your cooler is doing quite well. If your temps climb into the upper 80s, then study an overclocking guide - you may need to improve the cooling, alter key overclock settings, or reduce the overclock.

    - * -

    I'm probably gone for the rest of the weekend or longer. Good Luck.
    Last edited by ZeroChill; 31-05-2014 at 11:22.
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    Default Re: Need some help with i7 920 OC

    Hi, thanks for the response. I did some tweaking, made the ppl 1.89 and activated acpi (or what it's called), boosted dif amp to 1000 and i was able to stress for 4 hours with prime 95 without any errors.




    I don't know if i need to make it any more stable than this, i mean im not really going to ever stress my CPU this much in reality so i don't actually see the point. But im still wondering if this is good enough.. I could have left it for more than 4 hours though, but i don't know.

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    Default Re: Need some help with i7 920 OC

    If it ran that long with no issues then you only have to run it day to day and see if you run across any stability issues. It looks solid so far to me,
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    Default Re: Need some help with i7 920 OC

    Thanks for the response Cyberburnout

    I have a question though, since im not familiar with IBT, i was not able to use the Maximum test, it said that i don't have enough RAM. My Ram is 6gig but only 4500 was available at the time, and IBT required 4900 for the test. Kind of weird.

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    Default Re: Need some help with i7 920 OC

    First of all, welkom.
    what can help very good to get it stable is CPU Differential Amplitude set it to 700mv or the lowest in your bios, and give it a run then, the rest of your settings look oke.
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    Default Re: Need some help with i7 920 OC

    Havent noticed any problems with the current OC, been running it for a day now.

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    Join Date
    Nov 2013
    Location
    helmond netherlands
    Posts
    114
    CPU: i5 4670k 4.6ghz
    M/B: asus sabertooth z87
    RAM: 16gb corsair dominator platinum 2133mhz
    GPU: 2 X msi gtx 670 PE
    • turbobooster's Full Spec's
      • Case:
      • cooler master haf x
      • PSU:
      • be-quit dark pro 10/ 1000w
      • Cooling:
      • corsair h105
      • OS:
      • windows 8.1 64 bit
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    Default Re: Need some help with i7 920 OC

    Then it will be fine.
    cpu/i5 4670k 4.6ghz 1.2v stable/mobo/asus sabertooth z87/memory/16gb corsair dominator platinum 2133mhz/cpu cooler/corsair h105./psu/be-quit dark power pro 10/1000watt/videocard/2 X MSI GTX 670 PE/case/cooler master haf X/ssd/scandisk ultra plus.128gb/hdd/seagate barracuda. 1tb.

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