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1090t OC - Prime95 help

post #1 of 11
Thread Starter 
I'm having some issues OC'ing my CPU above 3.8Ghz. As soon as I gove above, regardless of voltage for CPU, NB, RAM, lowered RAM speed when I run Prime95 I get errors being reported in the Result.txt files stating some type of hardware error and that prime95 received 0.04 instead of 0.05 or something to that effect.

It just doens't make any sense to me that I'm stuck at 3.8Ghz and as soon as I go over my system is apparantly unstable. I can run my games and multiple successfull Bench with 3dMark Vantage and 3dMark11 even at 4.2Ghz, without any issues. every one else on this forum is reaching 4.0Ghz (also apparantly stable).

I read online on some other forum that Round error checking should be enabled in Prime95.... could this be my problem and not an unstable system? like I said above, I only get error in the result.txt, but the system in itself appears stable.

Thanks for the help....

Also, does any one know how I would confirm if my RAM\\CPU or NB is causing errors?
Edited by thestef - 4/30/11 at 7:51am
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post #2 of 11
Is it getting Hot? you dont have any cooling listed.
Try running 20 passes of Intel Burn Test on Max and see what happens
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post #3 of 11
Thread Starter 
Updated my profile, its an ocz vendetta 2, temps don't got above 50c at 3.8Ghz.

I actualy had my vcore at 1.63v (not knowing) and temps only made it up to 57c. Is there any problem running 1.60v so long as temps are arround or bellow 55c?
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post #4 of 11
CPU-NB and/or RAM error
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post #5 of 11
1.55 is the accepted max for vcore. whats your Ram? that 1.35v is the xmp settings for intel and dont really work for AMD,put it at 1.5v and test again.
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post #6 of 11
Hey. I wouldnt have done 1.6v on air for a 24/7 OC. But I dont really think the cpu wil be degraded in a way that U will notice. U prolly gonna get a new chip before U notice.

About the prime: Did U try running IBT 20 passes or even occt or linx as kevdog said?

If U dont fail in the program it self but in a report I wouldnt have cared.

Ram can be checked by using memtest. cpu with small prime.
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post #7 of 11
Rounding errors are associated with memory timings. You're going to have to loosen up your memory timings or up some voltages. Basically, the first couple of tests in a round in Prime95 just tests the CPU, the rest combines testing the memory, if you're running Blend tests.
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post #8 of 11
boot with memtest86 and let it run for a pass or 2,that will tell you if its ram,Prime95 sml for the CPU and Prime95 Blend for CPU-NB

Also,what is you NB speed and HT link set as? if you can put your NB around the 2600 mark and HT link at stock 2000,this will make your life easier trying to clock your Ram...
Edited by B NEGATIVE - 4/30/11 at 8:16am
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post #9 of 11
Thread Starter 
My memory is actualy set at 1.50v, the manufacturer spec is 1.35V. I already set my NB speed at aprox 2500Mhz, but I was having stability issues even when it was at 2000Mhz when trying to go past 3.8Ghz. I went ahead and updated my BIOS thinking this would help, same problem.

For some reason now after my BIOS update when I OC my NB my HT also goes up together in speed matching the NB.

I'm assuming I should run memtest while the system is over clocked at 3.9Ghz or 4.0Ghz to see if it will generate errors.

If I does, then I'l try to increase the voltage to 1.6v to see if this will help, if not I'll try to loosen the timings in the BIOS manualy, but this seems pretty fricken complicated, I have like 30 lines of setup to fill in and I'm not to familar with this process.
Edited by thestef - 4/30/11 at 9:08am
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post #10 of 11
Is your HT multiplier set to auto? If so, then set it to 10.
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