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Should i listen intel burn test ?

post #1 of 17
Thread Starter 
Well, for a small oc for me 166x21 and 1.120v intel burn test is saying that the cpu is unstable just in the 2nd loop. And in prime95 everything is stable.
I had to increase the voltage from 1.120v to 1.164v to say it's stable in 5 loops, with high stress test.

And i need to put 700mV or 800mV in such a small oc or it's not recommended? And the clock skew to normal setting ?
Or this settings aren't recommended in such a small overclock...
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post #2 of 17
Are you running IBT on maximum stress? Prime takes too long to find instability.

Your voltage is really good for that clock though.
post #3 of 17
Lots of us like to use IBT first, and if it can pass that run the long, 8+ hours of P95. If you are not passing IBT then something is not 100% stable.
post #4 of 17
If you can't pass IBT, you are not 100% stable. Simple as that.

Prime95 doesn't load it as much as IBT will, but it's still good to run both, and pass both.
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post #5 of 17
That's odd. Maybe it just doesn't work as good on AMD. I can pass stuff for 48+ hours on IBT, yet won't do 3 hours on prime95. (large fft)
 
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post #6 of 17
Quote:
Originally Posted by Badness View Post
That's odd. Maybe it just doesn't work as good on AMD. I can pass stuff for 48+ hours on IBT, yet won't do 3 hours on prime95. (large fft)
Ouch! 48+ hours IBT on your system is hell. Thats like running Furmark for hours on your video card. P95 I can still surf the web at least, while running IBT cant do anything.
post #7 of 17
Maximum stress? I usually just do it on standard, is that really a bad way to determine stability (sorry bwt threadjacking, it is not intentional).

What i usually do is run prime95 for 6 hrs and if thats good then i call it stable. I then run 20 instances of linx if im feeling like it. I usually run IBT if i want to know if an OC is stable without waiting.
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post #8 of 17
Thread Starter 
Ok, no i've put 1.160v ( on idle is goes to 1.152v) and i passed 25 loops with [high] stress setting in IBT.
You guys advice me to put the cpu differencial amp to [700mV] or [800mV] in the bios just to make sure the overclock is fully stable ? And also the cpu clock skew at [normal] ?

-edit-

The IMC voltage isn't too high ? 1.17v ? AMI BIOS says that 1.10 is the default, now it's on [Auto]

-edit-

I think this is the best voltage to my 3.5 overclock with turbo boost active and the power features on C1E and EIST.
Edited by CalinTM - 8/9/11 at 12:56am
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post #9 of 17
@ the OP

Thats is a good voltage for the OC, you can get 4 ghz no problem from the i5-750 especially from the mobo you're using,

I see you have 3 sticks of mem? you do know that 4gb will be running in duel and 2 in single? that may have an effect on your IBT results, does it show all 6gb in IBT?

Personally i'd take one of those sticks out, (as its not really being used...) and then give it another few goes.

I use IBT on max mem 10X, reboot, <- repeat 3x if it passes all combined 30 passes then i'd consider it stable.

Great result on the OC,

PS. I wouldn't use the 21x multi, your base clock should go above 200 so you've got room to play if you lower the multi, i tired for my life to get the 21x multi stable and i just couldn't without putting 1.5v through it!! give 200x20 with 1.35v and then start lowering the V till you've got it!!

Good luck man! let us know how it goes?
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post #10 of 17
Thread Starter 
@ChosenLord: I can't put more base clock, cuz my ram knows only 1333mhz, and if i pas that the ram will not be stable,and i need to put 166 BCLK to match with 8.0 mem. multiplier[1333mhz]And i don't need that much oc, 3.5ghz is fine for me. And i know 4gb will run in dual channel and 2gb run in single channel. I don't think this thing is affecting the pc in gaming, only in benchmark, witch i have none interest.
Edited by CalinTM - 8/9/11 at 1:05am
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