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Thread: pls help me OC my EX58-UD5 with unlocked CPU




  1. #11
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    Quote Originally Posted by bossque View Post
    So I've tried what you guys suggested: Virtualization (Dis), LLC (En.), XMP (Dis.) + manual RAM timings, PCI-E Frequency (100)...

    I tried both 133*32 and 166*26 (and similar). I even raised voltages to 1.26 (IOH, ICH...), 1.38125 (Vcore), 1.36 (VTT) and 1.66 (RAM).

    In the process, I even tried the latest F9h BIOS, but that beta is a broke.

    Well, nothing seems to be able to get me over 4200 MHz.
    It will probably take more voltage than that. For my 4.3GHz to be stable, I have to give it anywhere from 1.475V to 1.5V in the BIOS.
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  2. #12
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    Quote Originally Posted by bassplayer View Post
    It will probably take more voltage than that. For my 4.3GHz to be stable, I have to give it anywhere from 1.475V to 1.5V in the BIOS.
    Well, judging from the BSOD which I get after firing up LinX, I'd say it does need more juice. With my current 133*31 settting, I'm giving it 1.3125 V + 1.30 V (Vcore+VTT) just because I can - because it's cool enough - just to feel sure. But it seems odd that it's stable on 1.28+1.28 @133*31, but to achieve 133*32, I'd have to go to 1.40 V or maybe even beyond... Well, isn't that weird that one hundred MHz more would require .15 or so more voltage?

  3. #13
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    Not really. Processors usually hit a block where they aren't nearly as efficient any more. For example, mine needs 1.28 (1.3V BIOS) for 4.0GHz. For 4.2GHz, I need more than 1.4V. The chip is rated at 2.66GHz for me and 3.33GHz (?) for you. That means it should be very efficient at that point. However, while overclocking does up performance, at a certain point it takes a toll on power consumption.

    Now a rig running with a CPU at 2.66GHz isn't going to consume a whole lot less than a rig running the same CPU at 4.4GHz. There will be a difference, though.

    I'd suggest giving it 1.425 to see if that's enough voltage to get it decently stable. Lots of voltage for a short period, assuming you don't make it to the point of no return, is fine.

    If you're worried about how much you paid for your processor versus the performance you're getting out of it, set up a Dice or LN2 pot and watch that baby soar past any 920.

    For example, the highest clock ever reached on a 975 was 6.16GHz. The highest on a 920 was 5.41GHz.

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    Last edited by bassplayer; 10-13-2009 at 08:32 AM.
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  4. #14
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    You are likely going to need more QPI/Vtt than 1.38, what BSOD are you getting, here is some of my findings on what a few mean most often

    0X00000050 << Incorrect Memory Timing/Freq or Uncore Multi
    0X00000124 << Incorrect QPI/Vtt Voltage (To Much/Not Enough)
    0X00000101 << Not enough Vcore Voltage

  5. #15
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    0X0000009C

    That's what I get every time after a few seconds in LinX with any setting that's beyond 4.2 GHz.

  6. #16
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    Does this occur with your memory underclocked? What Uncore are you using? Please post the full settings you are trying and I will see if I can help ya get going

  7. #17
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    My full settings can be found in the first post (Uncore has to be 24*133 because RAM is 12 so 2*12=24 (at least) - as you can see it's stable and there doesn't seem to be any reason to lower it, neither QPI, if I don't raise Bclk). From what you can see inthere 31*133 for CPU and 12*133 for RAM is stable. I tested that o/c in prime and OCCT as well. Not to rely entirely on LinX...

    Now, any setting that would get me past 4200 MHz (e.g. 32*133 or 27*160) has failed so far. I did, as suggested in replies above, turn off Virtualization and XMP -->manual memory settings. Then enabled LLC and went with voltages as far as 1.38125 Vcore, 1.36 VTT, 1.88 CPU PLL, 1.28 IOH+ICH...

    I don't feel like trying 1.4 Vcore or 1.38 VTT for another 100 MHz on CPU because even if it does work, I won't have it that high 24/7 so it wouldn't be any good to me anyway.

    That 0x0000009C BSOD I get with every setting beyond 4200 MHz I have tried so far after a short while in LinX. I have not tried underclocked RAM yet though.
    Last edited by bossque; 10-14-2009 at 07:44 PM.

  8. #18
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    Your QPI is fine. 133*24 is only 3192 which should be okay on 1.335V.

    However, getting 4.2 with under 1.4V is pretty impressive as it is. I'd say there's a 95% chance you just need more vcore. While stop errors can sometimes be helpful, you can't always rely on them to tell you what's wrong. Since it won't hurt the processor to push it further, I think you should at least find out what kind of vcore you need to get higher. For fun if nothing else.
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  9. #19
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    As bassplayer has said, voltages needed are temp dependant in more ways than one. Also you can, with lower temps get away with less voltage, even at temps that seem fine and dandy. For example at 4GHz, my cousins 920 is stable (D0) at 1.32V with a peak temp of 89c (a bit warm). As soon as he got his water cooling loop set up, filled and bled, temps dropped to 74c under load and he was able to drop down to 1.26V (all voltages in CPU-Z).

    Although having an unlocked multi is great, you still may have more success from more BCLK and less CPU Multi. I know you've tried that already, but I wonder if Lsdmeasap has any info or experience with that?

    1.4V 24/7 is a pretty good voltage to settle at actually. have you noticed that the Xeon i7 based components are rated to take much more heat, even though they're the exact same components, basically. Don't be afraid to push a little but also bear in mind the voltages and temps you're personally comfortable with. For me that would be around 1.45V Vcore, 1.4-1.45VTT and 1.8V VDIMM etc. Less is OFC always better, but as I get impatient, I would set those from the off and just crank up the BCLK until I get the max I can out of the CPU etc.
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  10. #20
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    Default Re: pls help me OC my EX58-UD5 with unlocked CPU

    1.55 Vcore is the Intel Stated MAX so you have no worries with 1.4 or above. And with the QPI/Vtt, some sticks come default at 1.6V, so again no worries as this is normal. See here for my thoughts about QPI/Vtt voltages >>
    POST i7 CORE TEMPS HERE!!! - Page 5 - TweakTown Forums

    Higher Bclk would be best for performance, such as 200+, so for 4.3 or above use 205x21 or more.

    As far as using less Blck, you have to find a working multi that is stable, some are just not good to use. Odd ones will be best most of the time, did you try 29 or 33 yet, try those out. I have had good luck with 27 actually, but that was in DICE Runs. I am using 21 now on a 965 EX just because it is simple to setup. For 4.3 or above I would simply use more Bclk, higher multi's only allow you to use less bclk which hinders performance all around

    QPI Freq must be kept under 8.0Gt/s, that is all. Unless you have hard modded your board that is

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