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i5 760 Journey to 4ghz

post #1 of 30
Thread Starter 
Hi, i know this is very common question, but i still will post it, because i want to know your experience.
Currently seems like 1.35 is not enough. ATM testing 1.37. The 1.35 was on my border of liking, going past it is out of my comfort zone.
I am aiming for 4ghz. My ram is only 1066mhz, so i needed to loosen timings a bit (running at 1146mhz), to achieve 4ghz.
I know intel says 1.4v vtt is max for my chip, but is it save for 24/7? Not currently sure if 1.37 is enough, though.
Do you know a good software, that tests ram stability?
I was stable @3.7ghz 1.3vtt 1.24v vcore - Didnt need to OC my ram.
Btw, i havent set 4ghz, but 3.8ghz with 1.3vcore when testing vtt, so it should eliminate vcore.
Edited by Zvejniex - 9/1/12 at 7:18am
 
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post #2 of 30
Thread Starter 
Anyone?
Btw, it always crashes at 50-60 minutes of prime blend.
 
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post #3 of 30
http://www.memtest86.com/

This is currently the best program for memory testing.
You can also use Intel Burn Test. It will stress everything.
IMC voltage = VTT voltage right?
I have this at 1.4 since the last June and is still going , lol.

EDIT : My bad ... actually I entered the BIOS and checked it again and it is 1.3 not 1.4, sorry about that frown.gif.
Edited by HeadlessKnight - 8/31/12 at 10:48am
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post #4 of 30
Thread Starter 
Somethings not right... my ram isnt stable or ive hit cpu limit.
Ive set 1.39vtt 1.39vcore 1.9pll and it still crashes in ~50mins of prime blend. I think i will do small ftp test. if that passes, then its RAM, right?
I run them 1.2ghz, but at loosened timings, even a bit loosened than in CPU-Z SPD tab.
Edited by Zvejniex - 8/31/12 at 11:38am
 
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post #5 of 30
Quote:
Originally Posted by Zvejniex View Post

Somethings not right... my ram isnt stable or ive hit cpu limit.
Ive set 1.39vtt 1.39vcore 1.9pll and it still crashes in ~50mins of prime blend. I think i will do small ftp test. if that passes, then its RAM, right?
I run them 1.2ghz, but at loosened timings, even a bit loosened than in CPU-Z SPD tab.

I would run the ram test first.
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post #6 of 30
Thread Starter 
One hour of memtest should be fine, right?
Oh, and mbi somebody knows why cpu-z says 1.5v to my ram, but on the ram sticker it says 1.65v
Using 1.66v
 
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post #7 of 30
If the ram is 1.65 and you have it set to 1.66 you are fine.As far as the test goes at least 4 hours.
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post #8 of 30
I know this one! to be safe..1.43 max biggrin.gif ok..Intel originally posted 1.3..but changed it..to 1.4..but 1.43 is OK biggrin.gif
Don't use Prime..3 IBT runs..or 2-3 Hyper-pi 32m runs wink.gif
(to check for stabilitie)
Edited by Schmuckley - 8/31/12 at 3:11pm
 
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post #9 of 30
Quote:
Originally Posted by Schmuckley View Post

I know this one! to be safe..1.43 max biggrin.gif ok..Intel originally posted 1.3..but changed it..to 1.4..but 1.43 is OK biggrin.gif
Don't use Prime..3 IBT runs..or 2-3 Hyper-pi 32m runs wink.gif
(to check for stabilitie)

What he said.rolleyes.gif
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post #10 of 30
Thread Starter 
3hours of memtest and no errors.
with 1.23vtt 191bckl
Ok, im doing this from beginning:
Leaving my ram as it is(vtt/dram voltage/timings etc), but lowering my vcore to 1.2 and 3.1ghz frequency(21x150), will do 5 loops of intel burn (maximum) and if it passes, i will raise my bckl to 160, if fails, i will bump voltage a bit, hopefully until i reach 191bckl (ends up with 4ghz).
I might have overvolted VTT, when i set it to 1.35v and beyond. I hope 1.23vtt will do the job.
But what if i reach 1.4vcore and still cantreach 4ghz, will raising VTT actually help? Ive heard PLL sometimes is good when you surpass 180bckl.
Edit: Just passed 5 loops of IBT 3.8ghz with only 1.18vcore, that cant be right. biggrin.gif:D Im like very sceptical biggrin.gif
And since my Mobo is a junk, im even more suspicious biggrin.gif
I simply dont buy this. biggrin.gif I will do more runs with IBT, probably for straight 5 hours or is there something else you suggest me trying out to seek for full stability, because this cant be full stability biggrin.gif
Edit2: Since ive passed 5 loops of IBT ive reached 4ghz, but couldnt boot it at 1.18, hah, obviously biggrin.gif I managed to boot it at 1.23vcore with no errors or hiccups. Time to stress this THANG biggrin.gif
Edit3:Im stressing it, seems like for 4ghz it needs ~1.31vcore (20x runs on IBT an no errors), mbi more. Its time to get back to prime, darn, i hope it can hold for 1 hour - yeah i know its nothing, but lately ive had this problem.
Edited by Zvejniex - 9/1/12 at 7:24am
 
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