Overclock 24-hr Prime95 Stable but BSOD's when idle?

krazynutz · May 14, 2013

Hey everyone, just put together a new rig:

Asus Sabertooth X79
i7 3930K (Corsair H100i cooler)
16GB (4x4GB)Corsair Vengeance 1600
Quadro 4000 (I do 3D work)
Sound Blaster Z
Corsair AX850 PSU
Crucial M4 256GB SSD

I'm overclocked to 4.6Ghz and am 24-hr Prime95 stable on blend tests. Temps stay in the high 70's max. Everything seems fine whenever I'm doing anything. But if I leave the computer idle for a few hours, I come back to find that it BSOD'd and rebooted. Every so often it will crash while just browsing the internet. I've looked high and low and I've come to the following conclusions:

1) Bad Memory
2) SSD needs new firmware (hard to update because Crucial's updater doesn't like UEFI BIOSes)
3) Bad SSD
4) Driver issue.

My memory passes Memtest86 for several passes. I have some minidump files for anyone to look at. Just let me know what's a good place to post.

This is driving me nuts!

Thanks!

nukemaster · May 14, 2013

If you have tried to use an offset voltage in the negatives, This can happen. I have seen systems that work at load, but the idle voltage is just a hair too low.

Some users report switching off C states(power saving) may help this as well.

If you are having trouble with your ssd, maybe you need to set the bios to IDE mode just for the flashing.

krazynutz · May 15, 2013

nukemaster :

I was finally able to get the firmware updated and installed the latest RST drivers which seems to have stabilized things for now. what sucks is it's a waiting game. I can't do anything in particular to trigger it.

Here are my settigs @ 4.6Ghz:

vcore (offset) +.010v
vccsa (manual) 1.2v
vttcpu (auto)
Ram timings 9 9 9 24 2T
DigiPower:
LLC: Medium
Auto everything else

Does anything look strange or scary?

nukemaster · May 15, 2013

Nothing looks bad to be honest.
LLC will just push up the load voltage a bit(well technically it reduces a drop that intel spec'd for), but either way, it is not going to kill anything.

krazynutz · May 28, 2013

nukemaster :

Okay, it kept bsod-ing randomly. I've done two things that seems to have solved all my problems:

1) Re-checked all hardware connections. My SSD data cable wasn't snapped in securely. Could have sworn everything was snug.

2) New BIOS settings:

vcore (offset) +.010v
vccsa (manual) 1.1v
vttcpu (manual) 1.1v
Ram timings 9 9 9 24 2T
DigiPower:
LLC: Medium
Auto everything else

No BSOD's for four days. Before I was lucky to get four hours! So between the slight VTTCPU voltage increase and securing my SSD's data cable it looks like things are a lot more stable when the system isn't being stressed. I'll post an update a month from now If I remember!

BTW, I turned my back exhaust fan around to bring air in so now my only exhaust is my H100i up top. My idle and load temps dropped 4-5°!

nukemaster · May 28, 2013

The only issue would be a potential increase in some other temps like hard drive and video card with the rear fan flipped. If you have other fans in the system as well, it may not even be an issue.

Keep us posted.

krazynutz · May 28, 2013

nukemaster :

Case:
Fractal Design Arc Midi R2

Fans:
Intake:
Front: 2x 140mm
Bottom: 1x 140mm
Rear: 1x 140mm

Exhaust:
Top: 2x 140mm (H100i)

With this setup all temps seem to be the same or lower than they were with the rear fan exhausting. Biggest difference is vcore, vccsa, and vttcpu temps. What's great is that the H100i fans don't need to rev up as much for loads that don't reach 100%.

nukemaster · May 28, 2013

You have enough air in to be ok with that back fan flipped. on something without another intake in the front or bottom, then it may be bad.

I know all about air restrictions. my case has 1 x 120 in and 1x 120 out.

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Overclock 24-hr Prime95 Stable but BSOD's when idle?

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