Noctua NH-D14 - Intel i5 2500k - OCing problems.

With such a cooler I expected 4.7 to be a breeze and 5.0 my final stop.But, I was able to OC to 4.5 with fixed voltage and 4.7 with auto voltage(stable with tests) but I was afraid to let the 4.7 on auto so I set it on fixed (1.385) but it failed to boot, I had to clear the CMOS.I tried various voltages, even 1.450 but it failed.

Can I have some opinions? what am I doing wrong? My MOBO is Gigabyte Z68XP-UD5.

Thanks..(Bios is latest version so outdated guides do not help me)
82 answers Last reply
More about noctua intel 2500k ocing problems
  1. Maybe you've reached the limit of that particular chip.
  2. So low? I wouldn't even want to have a nightmare about that.
  3. Well, I can't even get 4.7..
  4. considering you didn't even list your temps, i'm scratching my head as to why you are pointing blame at your nh-d14?
  5. I'm not, just that in OC threads, there's always someone saying "without proper cooling you couldn't OC to those values anyways".I just wanted to get rid of that.
  6. herro, der be more den 1 variable in teh equation.
  7. What?
  8. when you raised the vcore (when it failed to boot), did you also change the cpu pll voltage?
  9. No, I only used vcore.
  10. you need to check what your pll is set at , more than likely will have to bring it down a bit. a lot is dependent on the quality of your mobo too. on a maximus board you can goto 4.8 by just flipping a few switches. other boards need much more configuration, or just can't max out the cpu's potential.
  11. It was auto.So when PC fails to boot I must lower pll?
  12. try to make more effective use of your replies...you say it was auto, ok, what was it set at? different motherboards have different auto values. do you have load line set to extreme? there is a sticky guide to all of this in the main area here.
  13. It was 1.300 if I remember correctly.I've seen the thread, it says pretty much this "if computer doesn't boot, flash cmos".No tips, no advices.Load line was not modified, can't remember the deafult notion tho.
  14. 5ghz@1.42 volts max, set to auto so it all downclocks
    no pll overvolt
    will go faster with more volts
    heat has become my barrier
    rock stable
    love my cherry 2500k

    ive heard the argument that auto kills cpus, but it NEVER goes over 1.42 volts and idles at 1 volt. personally i think its more dangerous running 1.42 volts through a 32nm cpu CONSTANTLY. ill take my auto
  15. System memory multiplier 16.00
    Cpu 100x47
    Multi-Steps Load Line Level 6
    Cpu VCore 1.37
    Cpu pll auto
    Dram voltage 1.560
    Ram timings 9 9 9 24
    Internal pll overvoltage enabled
    Real time rati changes in os disabled

    Those gave me a stable 4.7 OC at 70 ish temp.Whenever I try to 4.8 it boots, loads windows then freezes and blue screen.I even gave it 1.39 voltage but it just won"t work.
  16. careful with the pll overvolt, that seems to be what deads these cpus.
  17. I wouldn't put anything on auto personally. Since you know 1.37v vcore is stable, just change the PPL voltage to the recommended max. If that doesn't boot then up the vcore.
  18. gmcizzle said:
    I wouldn't put anything on auto personally. Since you know 1.37v vcore is stable, just change the PPL voltage to the recommended max. If that doesn't boot then up the vcore.


    what about the energy savings? what about the life added to the cpu by running unclocked and undervolted 95 percent of the time? while i agree with not using auto on certain features, i wouldnt disable it entirely. for example, set the pll overvolt, no auto there. quite dangerous.
  19. neon neophyte said:
    what about the energy savings? what about the life added to the cpu by running unclocked and undervolted 95 percent of the time? while i agree with not using auto on certain features, i wouldnt disable it entirely. for example, set the pll overvolt, no auto there. quite dangerous.

    It might be different for every mobo, but mine undervolts automatically even though I manually set the vcore. I disabled Intel's speedstep for underclocking because I remember it gave some annoying lag right when it went from idling to full speed.
  20. Ok, so you guys seem both well informed but argue about the pll, whats the setting that wont't damage the cpu if I run the pc 24/7? Il set it to that and see how well it goes.
  21. My pc just froze and then bluescreen while watching a movie, the cpu was at 10%, the blue screen contained something like this: "Your second - disn't get enough power" - Im forgetting that word, like the 2 things that dual processors have.

    Any causes/splutions?
  22. Enable pll overvoltage and set cpu pll at 1.55
    Did you say it was 1.3 before? Cause thats really low.
    Pll doesn't affect stability by decreasing or increasing it.
    Lowering just helps with temps. 1.3 is too low though.
  23. Give us your complete settings.

    That hapens when your vcore drops too much on low usage.
    Give us your complete settings.
  24. neon neophyte said:
    what about the energy savings? what about the life added to the cpu by running unclocked and undervolted 95 percent of the time? while i agree with not using auto on certain features, i wouldnt disable it entirely. for example, set the pll overvolt, no auto there. quite dangerous.


    Auto doesn't always mean energy settings. You can save more energy by manuall selecting your settings. I recommend setting everything manually. If you enable all the c states the cpu will drop voltage in idle and automatically save energy. Don't set c states to auto. People say that c states reduce stability and it used to be but its not the case with 2500k.
  25. Quote:
    Give us your complete settings.

    That hapens when your vcore drops too much on low usage.
    Give us your complete settings.

    System memory multiplier 16.00
    Cpu 100x47
    Multi-Steps Load Line Level 6
    Cpu VCore 1.37
    Cpu pll auto
    Dram voltage 1.560
    Ram timings 9 9 9 24
    Internal pll overvoltage enabled
    Real-time ratio changes in os disabled

    This is pretty much everything I modified, everything else is default.If you need any field information, just ask and I'l post it.
  26. Cpu vcore is 1.380, I was told that its recommended to keep it under 1.400.
  27. AlExAlExAlEx said:
    System memory multiplier 16.00
    Cpu 100x47
    Multi-Steps Load Line Level 6
    Cpu VCore 1.37
    Cpu pll auto
    Dram voltage 1.560
    Ram timings 9 9 9 24
    Internal pll overvoltage enabled
    Real-time ratio changes in os disabled

    This is pretty much everything I modified, everything else is default.If you need any field information, just ask and I'l post it.


    Lets first try getting high cpu as possible. Disable ram xmp, set to standard, set to 1333mhz, and set voltage to default(1.5v?). Disablle LLC and set vcore to normal. Use dynamic vcore instead. First set it to say +1.160v. (remember positve). Set PLL to 1.8v, set vtt to 1.05v, and set vccsa to 0.925v (all defaults. Disable turbo boost, disable realtime os changes, enable all c-states, and set cpu multi to 4.5ghz. Boot up and prime95 blendfor 1 hr, and small fft for 1 hr.
  28. Can't find LLC and how do I enable all c-states.Apart from that, done all.
  29. It will not boot with your settings, starts up a few secconds and shuts off.
  30. AlExAlExAlEx said:
    Can't find LLC and how do I enable all c-states.Apart from that, done all.


    LLC is multi steps load line. c-states is in the same page as the realtimeos changes and the turbo boost. C-states are the c1e, c3,c6, and etc.
  31. It still won't boot.Starts up a few secs and shuts down.
  32. OH! Up the dynamic vcore. *facepalm* that should help.
    What dynamic vcore does is add the voltage to the NORMAl vcore set for that cpu multi.
    Since my mutli is so high I needed +1.17v. Since your multi is lower you should set that dynamic vcore higher.
  33. Well, how high? I don't want to over-do it.
  34. Set 1.2v and see if it boots. check the vcore in windows.
  35. It does not boot with 1.2v
  36. Keep raising
  37. 1.2 is max, I can't raise more.
  38. Wait wait.. drop drop it. drop it to 0.2v
  39. It still does not boot with 0.200
  40. What I don't get is why can't we go from my base(4.8Ghz stablish) and fine-tune it, instead of starting from scratch?
  41. You can set multi to 4.8ghz. I was hoping to start lower so that we could see what problem there was but I guess I'm failing to be helpful. :(
  42. No, my point is.You are doing it with dynamic thingie while I do it with normal Vcore, why do you prefer the dynamic?
  43. AlExAlExAlEx said:
    No, my point is.You are doing it with dynamic thingie while I do it with normal Vcore, why do you prefer the dynamic?


    I used to use the multi step load line but in idle the voltage is as high or even higher than in load. Problems that also occur with LLC is voltage spikes. If vcore is at 1.3v under heavy load and suddenly the load dissapeared the voltage spikes to say 1.5v than drops back down to 1.3v in idle. This is bad for the cpu. By using dynamic vcore, vcore stays very low in idle (down to 0.9v) and only goes up during load. It saves wear on the cpu especially with high overclocks since the cpu won't be using high voltages all the time.
  44. AlExAlExAlEx said:
    No, my point is.You are doing it with dynamic thingie while I do it with normal Vcore, why do you prefer the dynamic?


    Too much conflicting information, do this don't do that, try the guide in my sig at this point you don't have anything to loose. :hello:
    47X for me took 1.385v
    48X for me took 1.415v

    Going beyond 48X with an air cooler, even the Noctua I don't recommend!

    However; "Danger Will Robinson!"

    49X for me took 1.445v
    50X took 1.475v
    51X took 1.505v
  45. listen to him ^^^^
  46. Quote:
    5.1 took 1.485 volts for me.
    Although every cpu and setup is different ofc.


    Man you do have a good one!

    With the proper cooling you should easily reach 5.2!
  47. I just can't, I've been in BIOS for the last 4 hours.I can't finish the windows loading animation with any OC higher then 4.7.I've fine-tuned it and it seems pretty stable.Unless someone has some suggestions I'm going to be pleased with 4.7.
    Also, Ryan.Your tutorial is kinda useless for me, it has Asus(I think) names and I have a Gigabyte MOBO, while some functions may be self-explanatory, some others aren't.So I can't properly follow it.
  48. AlExAlExAlEx said:
    I just can't, I've been in BIOS for the last 4 hours.I can't finish the windows loading animation with any OC higher then 4.7.I've fine-tuned it and it seems pretty stable.Unless someone has some suggestions I'm going to be pleased with 4.7.
    Also, Ryan.Your tutorial is kinda useless for me, it has Asus(I think) names and I have a Gigabyte MOBO, while some functions may be self-explanatory, some others aren't.So I can't properly follow it.


    Actually it's an ASRock, no tutorial is useless you just have to figure out what terminology applies, meaning the same setting but different names, it would be great if motherboard BIOS were all required to use the same terminology.

    I can test to try and help overclockers as much as I can within reason, but no one is expected to buy every motherboard on the market and create a guide to cover every single BIOS configuration.

    Quote:
    This guide is written assuming you are familiar with your BIOS and how to maneuver, change settings, and Clear CMOS when needed.


    My guide requires some basic BIOS background knowledge, and familiarity to be able to understand the same feature capability but different names from different companies design teams.

    My guide has the information to accomplish everything it was written to cover as many have already discovered.
  49. 4Ryan6 said:
    Actually it's an ASRock, no tutorial is useless you just have to figure out what terminology applies, meaning the same setting but different names, it would be great if motherboard BIOS were all required to use the same terminology.

    I can test to try and help overclockers as much as I can within reason, but no one is expected to buy every motherboard on the market and create a guide to cover every single BIOS configuration.

    Quote:
    This guide is written assuming you are familiar with your BIOS and how to maneuver, change settings, and Clear CMOS when needed.


    My guide requires some basic BIOS background knowledge, and familiarity to be able to understand the same feature capability but different names from different companies design teams.

    My guide has the information to accomplish everything it was written to cover as many have already discovered.

    I didn't say that your guide is useless itself, just useless to me.
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