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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 270

Poll Results: Was this guide helpful?

Poll expired: Oct 17, 2012  
  • 80% (237)
    Yes (and I DO have an ASRock motherboard).
  • 15% (45)
    Yes (but I DO NOT have an ASRock motherboard).
  • 2% (7)
    No (and I DO have an ASRock motherboard).
  • 2% (7)
    No (but I DO NOT have an ASRock motherboard).
296 Total Votes  
post #2691 of 9489
Quote:
Originally Posted by chronicfx View Post

Yes it was the only change. I did change TIM to CL pro from Ultra on top of the IHS and gained some cooling. But not more than another 5 degrees as I already had Pro on the die.





Both overclocks done in the first week or two of owning the extreme6 with ease. I did about 5 or so overnight runs for each clockspeed guessing an appropriate vcore dropping vcore in increments until I saw Whea errors. Not a single run error'd out. Which is why I am so impressed.
1.432 very high, no?
post #2692 of 9489
Here is another pic of a run

post #2693 of 9489
@jpmboy- I scoured through event viewer and could not find any hardware related errors that occurred before a reboot. I saw the errors from windows rebooting after an unexpected shutdown but that was all that was there. The only thing that I keep seeing are network related errors that I don't seem likely to be a cause or result of the restarts due to the times at which they occurred.

I haven't had a chance to look at SevenForum yet so there might be some answers there too. This is just baffling me as to why this is happening. I can pass countless runs of 3dMark vantage and 11 as well as IBT and P95 as long as the memory usage is low. But once I start using a lot of RAM I'll start seeing reboots. Just not sure what's up. Thanks for the advice though! I'm going to continue my searching!
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Spidey81
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post #2694 of 9489
Quote:
Originally Posted by JulioCesarSF View Post

1.432 very high, no?

some say yes, some say no
post #2695 of 9489
Quote:
Originally Posted by spidey81 View Post

@jpmboy- I scoured through event viewer and could not find any hardware related errors that occurred before a reboot. I saw the errors from windows rebooting after an unexpected shutdown but that was all that was there. The only thing that I keep seeing are network related errors that I don't seem likely to be a cause or result of the restarts due to the times at which they occurred.

I haven't had a chance to look at SevenForum yet so there might be some answers there too. This is just baffling me as to why this is happening. I can pass countless runs of 3dMark vantage and 11 as well as IBT and P95 as long as the memory usage is low. But once I start using a lot of RAM I'll start seeing reboots. Just not sure what's up. Thanks for the advice though! I'm going to continue my searching!

What are your complete settings in BIOS? Maybe we can see something from the settings you use to help out?

Another thing to think about is really an incompatible RAM (or the board just doesn't like it - biggrin.gif ), I kind of had this problem before with an ASUS and Gigabyte board and I primarily was lucky enough to have another brand of RAM with me which I swapped out and solved the issue. It could be an incompatible RAM or something along those lines that's causing the issue.
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post #2696 of 9489
Quote:
Originally Posted by JulioCesarSF View Post

1.432 very high, no?

Well Ivy does have a max Vcore of 1.52 volts so it should be fine.

I do have reservations about it, because the Extreme series (including the 6) does have a tendency to report lower voltage in CPU-Z than what is actual. Sin0882 showed this in a video and I've proven it to be true myself. I compared voltage using CPU-Z and HWinfo and HWinfo was actually showing between 30-40mV higher than what CPU-Z was showing, (The video of Sin0882 was showing the same discrepancy) that difference is pretty big. I was using LLC4 for reference if that makes any difference.

Looking at 1.432, I would add 40mV to that and it would actually come out to 1.472mV which is still fine specially if you're on water and the temps are good (relatively). Looking at his temps they were only hitting 75-76*C so that's pretty good for 5.0 Ghz, in fact I would consider that awesome temps!

I'm actually really looking at de-lidding my Ivy after seeing results like that! I just need to purchase some LP Ultra first before I do anything! biggrin.gif
Edited by mark_thaddeus - 1/23/13 at 9:00pm
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post #2697 of 9489
I have one question for the OP or for anyone who can answer this, why do we test with a custom profile in Prime95? From previous OCing experience we used small FFT's to test 'CPU' stability and the 'Blended test' for memory stability? Looking at the setting in the OP, isn't what we're using to test stability more of a blended test?

Is it because small FFT's focuses on L2 cache and not L3 (At least that's what is says in P95)? Can someone answer this?
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post #2698 of 9489
Thread Starter 
Quote:
Originally Posted by mark_thaddeus View Post

I have one question for the OP or for anyone who can answer this, why do we test with a custom profile in Prime95? From previous OCing experience we used small FFT's to test 'CPU' stability and the 'Blended test' for memory stability? Looking at the setting in the OP, isn't what we're using to test stability more of a blended test?

Is it because small FFT's focuses on L2 cache and not L3 (At least that's what is says in P95)? Can someone answer this?

Prime95 works by alternating between the max and min FFT settings.

A low FFT will stress the CPU the most, and a large FFT will stress the everything else on the motherboard (memory, chipset... etc.) the most.
"Running the FFTs in place" means using only the CPU cache to hold the data.

The small FFT test simply sets the the FFT range to be small (8 - 16) and runs them in the CPU cache ("Run in place").
This mode puts all the stress on the CPU and nothing else.

The blend mode sets the FFT range to be large (8-4096) and runs it with both CPU cache and memory (as normal OS would).
This mode puts stress on the CPU and chipset (northbridge, southbridge, memory). Basically testing everything.

I chose 8 as min because that is the lowest and will cause the most stress to the CPU by itself.

I chose 1792 as the max because many have reported that being the biggest stress to the Sandy / Ivy chipset.

So my custom test uses all of the motherboard but is twice the stress on the CPU (as the max is less than half of the "Blend" max) and starts with the 2 most stressful settings to Sandy / Ivy, being 8 and 1792 FFT.

I changed the time from 15min to 5min so that 12 FFTs could be tested in an hour instead of 4.
Edited by kennyparker1337 - 1/23/13 at 11:18pm
post #2699 of 9489
Thanks and +rep for answering my question!

That clears up the questions I had in mind and is really helpful! I have a one more thing to ask though...

So the test you've done (P95) basically covers a lot of things instead of trying to stability test the CPU first (small FFT) and then the memory (blended test), correct?
Edited by mark_thaddeus - 1/23/13 at 11:56pm
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post #2700 of 9489
Thread Starter 
Quote:
Originally Posted by mark_thaddeus View Post

Thanks and +rep for answering my question!

That clears up the questions I had in mind and is really helpful! I have a one more thing to ask though...

So the test you've done (P95) basically covers a lot of things instead of trying to stability test the CPU first (small FFT) and then the memory (blended test), correct?

Correct, but remember that the Blend test still uses the CPU very heavily.

Nearly everyone agrees that Blend is better than Small FFT on Sandy / Ivy.

This is due to the architecture change in the CPU / chipset from previous ones.
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