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Is your Sandy Bridge BSoDing when idle? Read this - Page 2

post #11 of 19
Yeah a lot of what I read suggested to leave those on. Do you have to leave on spread spectrum?
    
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post #12 of 19
In a situation where you are getting random bsods try the following:
  • Clear CMOS (quick way - take the baterry out), load saved stable overclock, fresh windows install with pretty much nothing installed, no internet connection, nothing just a prime blend run. With minimum processes running and windows services, it would ba clear indication of stability without other 'things' such as a driver error, windows update, internet connection causing bsod.

  • You could try the above or even a BIOS update, I stress that before you update, run stock setttings and then update the BIOS (**Don't update the BIOS on an overclock setting, you could risk bricking the mobo)

  • Go to control Panel/hardware and sound/power options and select High performance Mode.

  • Take the RAM out of the equation, underclock it if you have to and see wherther or not it continues.

  • Many have found that enabling SPREAD SPECTRUM reduces the voltage fluctuation.

  • Try a fresh OS install on a spare HDD or something, remember as explained before, too many bsods in the os = corrupt file system = unstable OS

  • Try Enabling all power saving features - C1E, EIST C3 and C6.

  • Try using Manual voltage instead of Offset.

  • IF you have an SSD Read THIS, it might help solve your problems.

  • Try running C3 and C6 on Auto. **** This is one that is being tested at the moment.



TFortunatly I don't have the issue but im searching of a way to tackle this problem. This is availabe in my Sandy Stable Club thread, anyways hopefully some of these TIPS could help you against the dreaded IDLE BSOD. I'll report back with the one that actually works, but try it out guys one of them might work for you.
Edited by munaim1 - 7/24/11 at 11:29pm
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post #13 of 19
Quote:
Originally Posted by MrLinky View Post
I'm not sure about the idle bugs, that could be a BIOS issue, but inconsistent Gflops is a sign of throttling in my limited SB experience (either temperature or wattage/amperage).
this. i also believe that my SB is throttling down for whatever reason i couldnt understand, though i already set the amps/current limit to 250.. anyway, still happy with HT being disabled, as i game alot, and no video/photo editing at all..
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post #14 of 19
Hmmm I just crashed at idle (in fact while I was typing on this forum with nothing else running but Core Temp).... I have C1E, C3/C6, EIST enabled.

Spread spectrum is off and my Windows 7 Minimum Processor State was at 20% at the time. If I change this setting it seems absolutely nothing happens to my clockspeed or voltages. So with EIST on, does Windows Minimum/Maximum Processor state even do anything?

This overclock was stable for 1 hour in OCCT and 40 minutes (16 passes) of Intel Burn Test on Maximum. I also gamed for 3 hours... I thought I was pretty damn stable :/.
    
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post #15 of 19
Thread Starter 
donkrx, do you have Vdroop override (aka LLC) on? If so, turn it off. The artificially higher idle and mixed load vcore is needed to counteract voltage overshoots and undershoots.

I'm not sure about the Windows Processor State settings. I've played around with it myself before but it didn't seem to make a difference. Unless you set the minimum to higher than the CPU normally idles at, the CPU/Motherboard will just ignore the Windows setting.
 
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post #16 of 19
My understanding was that LLC counteracts the voltage drop when subjected to a load (and not at idle). Past that, I haven't had anyone provide a solid explanation. I just want someone to tell me what it actually is doing. It could be applying more/less voltage in a number of manners, if that makes any sense.

Anyway, I cannot disable it because my motherboard only allows options 1-5, there is no disable the last time I checked. I will lower it though and see what happens, I'll compare idle voltages and idle voltage fluctuations. For now I just bumped Vcore because I got a 0x3B error code at BSOD.

Current voltages (CPU-Z, +.005v after I BSOD'd idle.... LLC on 5 / highest):

IDLE: 0.976 min, 0.988 max (even after I instantly cut Prime95, it does not go below 0.976)
LOAD: (100% Prime 95): 1.288 min, 1.296 max

In CoreTemp, the VID fluctuates quite a lot but never goes below 0.9607. In CPU-Z I do not see such fluctuations, but I see some. CPU-Z Vcore is usually lower than CoreTemp VID.

I believe my stock VID is 1.288 and my offset voltage in BIOS is +0.015. Am I supposed to have a lower max voltage in Windows than I set in BIOS, because of LLC?

If I lower LLC, would I have to raise Vcore?
Edited by donkrx - 7/27/11 at 4:33pm
    
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post #17 of 19
Heh MrLinky where did you get your 2600k from, Frys? whats the batch out of curiosuty?

Sorry for thread hijack
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post #18 of 19
Try running C3 and C6 report on Auto and disable EIST and C1E, let it run for a few days and see if you get a bsod, if not try re-enabling C1E and EIST and leave C3 and C6 report on auto.

This has worked for some.
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post #19 of 19
Thread Starter 
Quote:
Originally Posted by donkrx View Post
My understanding was that LLC counteracts the voltage drop when subjected to a load (and not at idle). Past that, I haven't had anyone provide a solid explanation. I just want someone to tell me what it actually is doing. It could be applying more/less voltage in a number of manners, if that makes any sense.
If you want the full-blown explanation, read this article.

But ignoring all of the technicalities behind it, Vdroop is responsible for raising the voltage higher when idle than when under load. This protects the CPU from the fluctuating power delivery the motherboard sends it when changing load states.

How it affects you:
Vdroop ON/LLC OFF: 1.3v in BIOS = 1.3v idle/mixed and 1.25v load
Vdroop OFF/LLC ON: 1.3v in BIOS = 1.3v idle/mixed and 1.3v load

However, you're using EIST and offset voltage, so you will still idle at less than 1v. Continuing with the example voltages above, with Vdroop on/LLC off, your motherboard will send 1.3v for fractions of a second when going from idle to full load or full load to idle. Software like cpu-z won't display that however because it happens so fast. You will see sustained 1.3v in mixed loads, like gaming.

For me, I have ~1.44v (using offset) set in the BIOS, which droops to 1.408v when using Prime or LinX. But while gaming, my vcore fluctuates between 1.42v and 1.44v. I hope I didn't confuse you even more

Quote:
Originally Posted by The Viper View Post
Heh MrLinky where did you get your 2600k from, Frys? whats the batch out of curiosuty?

Sorry for thread hijack
No worries . This was actually a binned one from Patch. I managed to snag one of the "5.2GHz" ones from his sale thread. I forgot the batch number, but i'm pulling my loop apart tonight so i'll wipe the TIM off and get back to you.

Edit: It's 3117B310. Nothing special but it gets the job done.
Edited by MrLinky - 7/28/11 at 12:36am
 
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