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Define stable.

post #1 of 10
Thread Starter 
I run OCCT 16 hours (4.8ghz 1.41v) then play a game & get BSOD 124, 2x till I had up the vcore to 1.43. Then later watching a movie & suddenly crashes again.

Is frusatrating & I dont seem to have any trouble booting my pc at much lower voltages & running intel burn test..why the massive increase needed?

Attachment 215697
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post #2 of 10
Maybe you kept the power saving enabled. OCCT pushes the CPU constant at 100%, so it checks stability at that constant load. While watching a movie the load is maybe 5-10% with occasional spikes that demand more speed - then the CPU responds by increasing its frequency or waking up a dormant core. Maybe it's these spikes that crash your rig. Usually to keep a CPU at a very high OC with power saving enabled you need to set a higher-than necessary Vcore to account for the variations in voltage during periods when the load changes.
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post #3 of 10
For me, I Prime95, Youtube, web browse & play music simultaneously to test if my computer is stable. 100% effective thus far, currently running 4.8GHz on my 2600k 24/7 with no problems whatsoever. However my chip requires 1.45v instead of your "massive" 1.43v. Also, seeing that your cooler absolutely dominates mine, I don't think you should be worried at all.

Note: Bsod 124 can mean two things: +Vcore or +/-Qpi/Vtt.
Edited by Dust - 6/17/11 at 4:40am
    
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post #4 of 10
That smells like either VCCIO needing a bump to 1.15 or disabling C6 rather than CPU Vcore.

edit-Then again that fan ramping up to 66,000 rpm could be problematic.
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post #5 of 10
I avoid the situation you describe (which I conclude is, "I pass the hard tests but fail at simple everyday activites" by using a different rig for the easy stuff. I conclude that you see stability as being able to do both activites and I do see your point of view. Why I change rigs to do the easy stuff is, who wants to mess up a good OC but then who needs a rig running at 4.5GHz to watch NetFlicks? I say be happy if it passes the dedicated stability tests and conclude this defines stability. I am sure many others may say that the rig must be able to do both the hard and easy task, it would be worthwhile to keep probing just what it is about the easy task that trips the rig up, but not for me.
Edited by PCCstudent - 6/17/11 at 8:47am
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post #6 of 10
I have one even cooler experience:

1) Overclock the GPU to 960MHz core on stock vGPU.
2) Pass FurMark for 8h, zero crashes, freezes or anything.
3) Fire Oblivion. Crashes after 4 minutes.
4) Fire BFBC2. Crashes after 20 minutes.

Conclusion? I have no idea of what stability is until I test it gaming.


Same goes to the processor O.o
   
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post #7 of 10
Thread Starter 
Thanks guys some great responses & ideas to try.
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post #8 of 10
Stable:

adjective, -bler, -blest.

1.
not likely to fall or give way, as a structure, support, foundation, etc.; firm; steady.

2.

able or likely to continue or last; firmly established; enduring or permanent: a stable government.

3.

resistant to sudden change or deterioration.


Apply it to overclocking. There's your answer.
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post #9 of 10
It's all completely relative, and you can never have a 100% stable system (even at stock). It's just a numbers/probability game.

You can appear to be rock solid for 24 hours running something like OCCT or Prime, but then when you load up a game, your system can crash immediately. Because no one stress-testing program can stress EVERYTHING in the same way that SOMETHING might.

TBH, I consider "stable" to be where I don't get any interruptions in a "typical" period of using my computer. I couldn't honestly care less if I pass 8 hours of OCCT or Prime because I don't use my computer for 8 hours at a time. I don't do any critical work with my desktop, so I am not concerned about losing active documents I'm working on, so as long as it doesn't fail during the couple hours I might be playing a game (which it doesn't), then I consider that stable.
    
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post #10 of 10
I've found personally that when I finish a machine 60 mins OCCT and 6 hrs Prime Blend stable at proper temps, they are 24/7 stable as daily used machines. I don't use IBT at all, 'cause IMO it has no real-world worth, just heat generation.

Everyone is going to disagree about this however, and everyone thinks that their way is the right way. I have many, many daily-run aggressive overclocks that never fail, never blue screen, never dump apps, reboot or lock up, ever, using just the above method, so draw your conclusions as you like.

PS: I do see some wonkiness with overclocked machines that are run by sleep/unsleep (never shut down) after a couple weeks, but that's true of stock-clocked machines also.
Edited by 2thAche - 6/17/11 at 7:30am
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