WHEA uncorrectable error on overclock

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8 Apr 2013
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I recently did my first self build, comprised of the following:-

Corsair Carbide 520 case (the big one)
i7 4770k 3.5/3.9GHz CPU with standard fan cooling
Asus Maximus Ranger VII (Z97) Motherboard
250Gb Samsung Evo 840 SSD
3Tb WD Green 7200rpm HDD
Corsair Vengeance Pro 2400MHz 8Gb (2 x 4Gb modules) memory
Asus GTX 760 2Gb DDR5 GPU (I didn't want to get into daft prices for GPU while Steam is fulfilling my gaming needs)
The old Samsung 500Gb hard drive from my old comp is also plugged in (mainly while I was transferring old files, but never removed it again)
Corsair CXM600 Bronze PSU
Windows 8.1 on the SSD

In standard unclocked mode (apart from getting the memory up from 1600 to 2400MHz) the computer runs fine. Go into the BIOS tweaks on start-up and the motherboard software suggests overclocking to 25% on an air cooling system, which I do and about 1/2 the time I get the blue screen "WHEA uncorrectable error" message shortly after getting into windows (like 2 seconds). If I undo the overclocking, it stops. Resting CPU temp is aound 41C and under load it's about 70C, although I have not done much that's really taxing. I've never seen the CPU do more than 17% load, i'm processing some large video files and playing SW Battlefronts/Arkham Asylum.

Even though the CPU temps seem nowt to worry about (the room is a bit of a sun trap, so ambient temp in there is probably 26C in the summer), I get a Corsair H100i water cooler and fitted it last night. Rest temps are now 28-30C and load temps (doing same as before) are now 36-38C - seems to be working fine.

I try the BIOS tweaks again, going for the profile suggesting for liquid cooling (31% CPU overclock)....return of the WHEA fault. Ramp it down to air cooling (25% overclock) and it seems stable. I've never hammered the computer yet to see how it copes under some real stress.

So what do you guys think? PSU not up to the task (I thought 600W was plenty)/faulty? Motherboard fault? Thanks for looking.
 
A WHEA fault is usually a lack of vcore. Try bumping it up a bit and see if that helps. What's the actual clock speed and voltage you are using?
 
Had same issue, probably not vcore.

In bios disable Intel c states and set vccin to 1.9-2.0v.

Make sure you set vccin not vccring, as those volts on ring will kill something.
 
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