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Stable or not stable?

B

bliz

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xentr_thread_starter
Hey guys, so i have had my I5 4670k stable at 4.2 ghz 1.220 volts for over a month now, played a lot of games, used aida64 ,was all good.

BUT i just had a bluescreen today, WhoCrashed says it's an harware error. The crashed happened when launching Planetside 2 so, at this point the CPU was cool.

Even when benchmarking, the CPU stays under 70c.

My SSD is a few months old, GPU too ,Mobo is brand new, so i'm pretty sure the hardware error is the CPU. Does it need more voltage? Am i at the edge of stability with 1.220 volts?

Help :(
 
I have no first hand experience with those new procs but I understand they can be very finicky. Any LLC available? What speed is your memory running at?
 
xentr_thread_starter
Sorry but i don't know what LLC is :/ my memory is running on it's factory speed , 1600mhz. XMP enabled.
 
Load Line Calibration: Its a Bios option to stabilize voltage under load, helping to mitigate Vdroop. If your mobo supports it?....it should be around the rest of the voltage settings in your bios.
 
xentr_thread_starter
I looked carefully, nothing related to LLC in the bios. I upped the voltage by 3 millivolts, maybe that can help stability.


EDIT, found LLC, was well hidden^^ I have it on auto. There is level 1 to 8 options.
 
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^^^ If you run your CPU through a few benches and all is good, along with having only experienced 1 BSOD in the last couple of months, I'd just elave it for the time being and note when / if you BSOD a 2nd time.....if not leave it until you do....when / if you BSOD again explore your OC Settings at that point ;)
 
I would try playing around with LLC. Maybe do some googling and see what other people have theirs set at. As always, auto is quite vague. On one of my boards, auto does nothing, normal does nothing and the extreme setting is "melt the board".
 
I would say that's more than enough voltage for 4.2ghz (I would try to bring it down, but that wouldn't help with why you bluescreened). No experience with haswell, but I have been playing with my 3570k and had it stable at 4.2ghz yesterday at 1.12v, if I recall correctly (its wrote down at home).

Did you check the crash report to see if it gives any other details?
 
xentr_thread_starter
there it is :


On Mon 05/05/2014 15:24:08 GMT your computer crashed
crash dump file: C:\Windows\Minidump\050514-6926-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75BC0)
Bugcheck code: 0x124 (0x0, 0xFFFFFA80089AB028, 0xBF800000, 0x124)
Error: WHEA_UNCORRECTABLE_ERROR
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This bug check indicates that a fatal hardware error has occurred. This bug check uses the error data that is provided by the Windows Hardware Error Architecture (WHEA).
This is likely to be caused by a hardware problem problem. This problem might be caused by a thermal issue.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



I think haswell needs more voltage, also , my CPU is not stable at 1.21v-1.215, instantly crashes when benching or even at idle after a few minutes. Thats why i set it to 1.220 in the past and it worked for a month. So i think my chip actually needs a bit more voltage... i don't know...

Anyway, my cooler can take much more wattage in the face, so i put it to 1.223 to see...

BTW i have heard that some people needed 1.3v to achieve 4.5-4.6ghz overclocks.
 
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Ya, there are other factors to take into consideration. Have you run memtest at all? Could easily be a faulty or failing stick of ram. Also, I have a video card that will crash the box its in when doing 2d flash on the desktop. Upping the voltage on the card ever so slightly seems to have helped immensely. I havn't investigated further as if its maybe the mobo vrm's beginning to fail or perhaps my PSU is getting a little dodgy.

Just say'in. Don't automatically figure its a cpu thing until you've ruled everything else out. I know it sounds daunting. Damn, I've even had bad installs of .net framework screw things up. 1.22 vdc should drive that OC, no probs. That being said, every system is different and just maybe your system might need that extra little bit of voltage. I don't know how good you are with a multi-meter, but I'd monitor your 12v rail while under load and see how much droop you're getting at the PSU. Then move on to the board. Your temps seem well within spec, so I don't think its a thermal issue. Unless the VRm's on the mobo are perhaps getting to hot, but that usually results in throttling rather than a blue screen. Any capacitors on the mobo looking swollen?

Wish I could be more help. I wish you luck.
 
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