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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 658

Poll Results: Was this guide helpful?

Poll expired: Oct 17, 2012  
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post #6571 of 9531
Quote:
Originally Posted by Yanush View Post

Hi,

Thanks for response - testing took me a while...

So as a backgoround info: I overclocked cpu to 4.5 Ghz with vcore offset +0,025 Turbo voltage +0,008 (max vcore durning prime95 reported as 1.200

Just looking at your first sentence only. Your going about it the opposite way. It all depends on your idle vcore and if your idle will remain stable with a lower offset but what you want is low offset and increase turbo to stabilize full load. So usually low offset/ higher turbo not high offset low turbo.
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post #6572 of 9531
Quote:
Originally Posted by Yanush View Post

Hi,

Thanks for response - testing took me a while...

So as a backgoround info: I overclocked cpu to 4.5 Ghz with vcore offset +0,025 Turbo voltage +0,008 (max vcore durning prime95 reported as 1.200

All settings was done with this tutorial, it means ram was set manually to the values matched their specyfication (i dont know if that matters, because the AUTO values was exacly this same, it detect proper values wuithout problems, but still, i wanted to follow the manual)
All the test below was done with this CPU overclocked settings.


As you mentioned the instability could be memory (because test failed usually when lot of ram was tested with CPU) and guess what:

I have 16GB ram dual channel (4x4GB)
  1. I did memtest - in first 10 min more than 115 errors detected...(so i didnt test it much longer, obviously something is wrong)
  2. I did windows memory test - also detect errors
  3. I did prime95 custom test (from this tutorial) with memory to test 8GB - errors in first 5 min on two or three cores


So i opened up my PC, unfortunatelly my big cooler is blocking most of ram slots, so i only had acces to one stick (without a need to take of all cpu cooling) so i decided to try my luck, and i pulled of this one stick (B2, the last one). And ...

With 12GB of RAM (3x4GB):
  1. I did memtest - one hour without single error
  2. I did prime95 custom test (from this tutorial) with memory to test 8GB - 1 hour without any errors...

So i thought i am lucky! It was the stick (or the slot) but at least i knew which one.

But i wanted to make sure - i put back the stick which i removed before, to test again and see errors again, so..


With 16GB of RAM (4x4GB):
  1. I did memtest - no errors in 1 hour!! I was totally suprised and said to myself "no no, its a trick", so to make sure, i left memtest for all night long, it run more than 10 hours...WITHOUT SINGLE ERROR (5 pasess)
  2. I did prime95 custom test (from this tutorial) with memory to test 8GB - NO ERRORS in 2 hours...
  3. I did prime95 custom test (from this tutorial) BUT with memory to test 13,5GB (just to make it extreme for memory) - NO ERRORS in almost one hour (and this test is currently running so i will keep it for 2 hours)

LOL? What happened? The only logical explanation for me could be that somehow, the stick was not inserted corectly, and by accident, when i pulled it off and put in back, i "fixed" it.

But the bizzare thing is...I just did Windows memory test and it detect problems...

Don`t know what to do:
  1. Should i beliebe 10 hours memtest and prime95 even if windows memory tool shows errors?
  2. Why i had errors before in any test...


Memory is on lifetime warranty but i dont know if i should do anything - if they will test memory and see its ok they would just send it back to me.

Need help! smile.gif

Easy fix! That stick was not seated properly! thumb.gif
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post #6573 of 9531
Quote:
Originally Posted by Jpmboy View Post

Easy fix! That stick was not seated properly! thumb.gif

The question is why Windows Memory Tool is founding errors (i dont know exactly what kind of errors, because after using the in-build windows tool computer restarts and after there is a message "Windows found problems with your memory")

Should i just ignore that...?
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post #6574 of 9531
Hello,

Im new to overclocking and using this guide to learn.
I've 'set all the settings to recommended and started overclocking, i passed the starting off part until 4.4 ghz, when i put it to 4.5 it wouldn't start up my pc anymore and when I put it to 4.5 in extu it will crash my computer. So i increased my additional turbo boost voltage by one, to +0.008v and it worked and I passed. then the same thing happened, i put it to 4.6ghz and the pc would crash or not start. I increased the turbo boost voltage to +0.0012v but it still wouldn't start. So I figured it was getting to little iddle voltage all of a sudden and increased the offset voltage a step but that didn't help either.

What am I doing wrong?

Thanks in advance!
post #6575 of 9531
Quote:
Originally Posted by Azraelus66 View Post

Hello,

Im new to overclocking and using this guide to learn.
I've 'set all the settings to recommended and started overclocking, i passed the starting off part until 4.4 ghz, when i put it to 4.5 it wouldn't start up my pc anymore and when I put it to 4.5 in extu it will crash my computer. So i increased my additional turbo boost voltage by one, to +0.008v and it worked and I passed. then the same thing happened, i put it to 4.6ghz and the pc would crash or not start. I increased the turbo boost voltage to +0.0012v but it still wouldn't start. So I figured it was getting to little iddle voltage all of a sudden and increased the offset voltage a step but that didn't help either.

What am I doing wrong?

Thanks in advance!

You haven't added enough turbo voltage. Understand that you adding small fractions of a volt (mV) to your cpu each time you increase offset or turbo. There is not much increase in full load voltage going from say a +0.004 to a +0.008 turbo. Whats your CPU-z idle and full load vcore? How long are are you running P95 for?
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post #6576 of 9531
biggrin.gif nevermind
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post #6577 of 9531
Couple of questions -
Does Sandy take more voltage to stabilize than Ivy? What would be a average vcore for 4.6ghz. Is Sandy limited to running 2133 or lower memory? Is there a setting I can raise to help with memory stability over 1866? My 2700k memory is at 1866. I tried at 2133 and just couldn't get it stable until I dropped it down to 1866. Are there any other settings that is a must with Sandy for oc'ing stability. I had been running a 3770k and tried using the same settings to get 4.6, but it wasn't working out.
    
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post #6578 of 9531
Quote:
Originally Posted by hotrod717 View Post

Couple of questions -
Does Sandy take more voltage to stabilize than Ivy? What would be a average vcore for 4.6ghz. Is Sandy limited to running 2133 or lower memory? Is there a setting I can raise to help with memory stability over 1866? My 2700k memory is at 1866. I tried at 2133 and just couldn't get it stable until I dropped it down to 1866. Are there any other settings that is a must with Sandy for oc'ing stability. I had been running a 3770k and tried using the same settings to get 4.6, but it wasn't working out.

My 2500k is stable with 1.336-1.344v. What speed is your Ram? Each chip is different so you can't use your previous settings. You will need to completely start over when OCing a different chip
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post #6579 of 9531
Quote:
Originally Posted by Lucky 23 View Post

My 2500k is stable with 1.336-1.344v. What speed is your Ram? Each chip is different so you can't use your previous settings. You will need to completely start over when OCing a different chip
Currently my ram is at 1866. And after a bit of reading I guess I'm pretty good at 1.344v and 4.6ghz with a 2700k. A lot of 2500k's seem to need that for 4.5ghz stable. I think I was just going for too low of a vcore coming from a 3770k. I'm going to do some testing with the ram. It has been good for 7-9-8-21 @ 1866 in the past and 8-10-9-24 is where it is now. You're right in different chip, I was looking for a easy fix, but should know by now that it takes time, information and patience! It scores unbeleivably close to the 3770k in most areas and actually surpasses it in sata latency. Too bad I delidded my 3770k or I might have sold it and just kept rocking this. It will probably be a week until I get my clu, so I'm going to enjoy this while its installed.
    
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Samsung 840 EVO Asus Bluray Custom Water Win7 Ultimate 
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post #6580 of 9531
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Originally Posted by Lucky 23 View Post

You haven't added enough turbo voltage. Understand that you adding small fractions of a volt (mV) to your cpu each time you increase offset or turbo. There is not much increase in full load voltage going from say a +0.004 to a +0.008 turbo. Whats your CPU-z idle and full load vcore? How long are are you running P95 for?

I'm not 100% sure which voltage you ment, so screenies for you!
idle


load


And I run prime 95 for 5 minutes, however I wasn't even able to run it in the situation of my first post.

So I should put my turbo boost up 2 steps and my multiplier 1?
Because it seems to me that only adds voltage when I'm under load and it craps out on me when starting windows which won't really put that much load on it or does it?

Thanks for your help!
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