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Nearly there- i7-960@ 4.3 ghz stability

post #1 of 8
Thread Starter 
I am running into a stone wall, however I still think I can successfully stabilize 4.3 ghz.

So far:
Memory is running at around 1050 mhz so I've got some serious headroom for ram.
Voltages:
CPU: 1.45v~
PLL CPU: 1.2v
QPI: 1.335~
LLC: On
HT: On
Turbo: off

Let me know if there's any other settings to help stabilize the system.

So far running at 1.2v PLL has been giving me better results but I suspect it will crash again.

Alright 9 hours and 12 minutes Prime95, temps we staying at around 70c~ at around 30% fan speed.

Edited by AsAnAtheist - 5/26/11 at 4:12pm
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post #2 of 8
4.3 on a Nahalem Quad is pretty good. Put your QPI up to 1.4, don't go much past that if you want to keep your chip for awhile. Try matching your VTT with your QPI as well. If that doesn't stabilize it then its likely you'll need more vcore which I wouldn't advice. Pushing 1.45 through those chips is a lot of voltage. What BSOD codes are you getting?
    
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by Klue22 View Post
4.3 on a Nahalem Quad is pretty good. Put your QPI up to 1.4, don't go much past that if you want to keep your chip for awhile. Try matching your VTT with your QPI as well. If that doesn't stabilize it then its likely you'll need more vcore which I wouldn't advice. Pushing 1.45 through those chips is a lot of voltage. What BSOD codes are you getting?
Don't recall which BSOD's but it changes.
So far bumping PLL to 1.2 has let my 4.3 ghz overclock stay stable for a bit over 30 minutes.
I may just let it run through work, and then if it even survives that, then overnight.

I am guessing QPI >1.4v= deteriorates the CPU?
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Sheep Prodigy
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post #4 of 8
Quote:
Originally Posted by AsAnAtheist View Post
Don't recall which BSOD's but it changes.
So far bumping PLL to 1.2 has let my 4.3 ghz overclock stay stable for a bit over 30 minutes.
I may just let it run through work, and then if it even survives that, then overnight.

I am guessing QPI >1.4v= deteriorates the CPU?
Quite possibly, max recommended by intel is 1.35, 1.37 is considered easily safe and 1.4 the general limit. Past 1.4 temps start to go up drastically. I had a W3520 that degraded from running 1.775 Ram, 1.45vcore, and 1.425 QPI/VTT so my advice would be to back off to 4.2 just to be safe.
For reference:

101 BSOD = more vcore
124 BSOD = QPI/VTT/RAM (occasionally can be vcore)
Letter+Number BSOD = Generally Vcore

Also to disable automatic restart on BSOD:
Right Click 'Computer' -> System Properties -> Advanced -> Startup and recovery settings -> Uncheck 'Automatic Restart'
    
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post #5 of 8
Thread Starter 
Thanks Klue so far the system is still running well@ 4.3ghz. 51 minutes in. Time to let it sit there while I am at work, that would be about 9 hours give or take total of Prime95.
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post #6 of 8
Happy to help, let us know how it goes.
    
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post #7 of 8
Thread Starter 
Alright still running fine at 4.3 ghz at the same settings showed on the first post.
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Sheep Prodigy
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post #8 of 8
Thread Starter 
Alrighty, 9 hours tested. 4.3 ghz. I will leave it running tonight as well.
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Sheep Prodigy
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