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Not Linpack stable?

post #1 of 7
Thread Starter 
Been running this w3680 @ 4.0 GHz for a while without a problem but was thinkin about running it @ 4.5 GHz 24/7 instead. Upped the vcore to 1.39, PLL to 1.88 and VTT to 1.325 but somehow Linpack always crashes. And it's just Linpack that does.
Tried 3d Mark, Unigine Heaven, Prime, etc whithout a problem but as soon as I start OCCT Linpack or LinX it crashes in a few seconds. Is there a common thing that happen to affect Linpack/LinX? VTT for instance or maybe RAM-timings?
There is absolutley no difference between 1.387-1.39 in vcore, 1.24-1.325 VTT and 1.88-1.92 PLL in the matter.
My memory is at 870 MHz and CAS 9-11-11-28-128 and 1T @ 1.65v
Otherwise 145 FSB and 31 multi.

Please advise.
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post #2 of 7
Linkpack/IBT is highly demanding and it really stresses the system more than other benchmarking apps. If you can pass it it just shows that your system is that much more stable and will standup to everyday use even better. If your fine with your rig not being as stable then that's ok. Its up to you and your definition of stable. Personally i wouldn't let that pass with me. Your PLL is to high also 1.9 is the max. Set it to 1.80 and your VCCIO is to high also. 1.20 is the safe 24/7 max. Set your VCCIO to 1.15 Also try stock memory settings (X.M.P) if you have it.
Edited by pent - 1/16/12 at 4:28pm
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post #3 of 7
Thread Starter 
I'm not satisfied with my PC not passing Linpack without errors. But what I am asking for is WHAT makes it fail?
I mean, since none of the changes I made seem to have any impact at all. I do not get BSOD and therefore I get no guidance in whats causing my problems.

Pent: What is VCCIO? Do you mean VTT? If thats the case I can inform you that my old i7 975x required 1.45 VTT to run at all.
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post #4 of 7
Quote:
Originally Posted by Sneakybastard View Post

I'm not satisfied with my PC not passing Linpack without errors. But what I am asking for is WHAT makes it fail?
I mean, since none of the changes I made seem to have any impact at all. I do not get BSOD and therefore I get no guidance in whats causing my problems.
Pent: What is VCCIO? Do you mean VTT? If thats the case I can inform you that my old i7 975x required 1.45 VTT to run at all.

Instability with the RAM or CPU Can cause that, yes VCCIO is the VTT, i suppose its different for 920 as you are saying. More VCORE may help. whats the exact error? It could also be your RAM unstable.
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by pent View Post

Instability with the RAM or CPU Can cause that, yes VCCIO is the VTT, i suppose its different for 920 as you are saying. More VCORE may help. whats the exact error? It could also be your RAM unstable.

Programs says halted with errors. Calculation error I suppose?
Regarding the memory, I used to have Corsair Vengeance 6gb but changed to current G.Skill RipJaw. No difference there (not saying its not memory related though).
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post #6 of 7
Quote:
Originally Posted by Sneakybastard View Post

Programs says halted with errors. Calculation error I suppose?
Regarding the memory, I used to have Corsair Vengeance 6gb but changed to current G.Skill RipJaw. No difference there (not saying its not memory related though).

Yeah means its not stable, id mess with the rig untill you can get it rock solid, My Rig passes prime and IBT on 50 passes even.
Edited by pent - 1/18/12 at 5:50am
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Western Digital 7200 rpm 500 gb (Storage)  CRUCIAL M4 64 GB SSD SATA III (Boot Drive) External 1 TB Western Digital HDD ASUS DVD-RW 
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post #7 of 7
See if it passes at stock first!
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