[SOLVED] whea_uncorrectable_error windows 7 BSOD - HELP

TimTam00 · May 6, 2015

Hi everyone, I've just assembled a new PC and am getting frequent BSOD's with error code 124 (unrecoverable hardware error).
The minidumps are available here:

https://www.dropbox.com/sh/dqwwz0ljbv6vfal/AACgERQ2PPtuLai8V9XesWMRa?dl=0

On day 1, the blue screens were about an hour apart.. now (day two), it blue screens within 30 seconds of Windows loading.

It doesn't blue screen in safe mode.

Sorry, but I'm at work and can't post the system profile. High level:
The motherboard is an Asrock Fatal!ty Killer Z97X with drivers from the CD installed.
CPU is an i7-4790K running at stock clock speed and voltages.
OS is Windows 7 with Windows Update turned on and all updates installed.
I removed the video card (Gigabyte R2 290X) and am using the onboard graphics for now. I uninstalled the Gigabyte software and drivers.

I picked six minidumps at random, and consistently the error is:

FAILURE_BUCKET_ID: X64_0x124_GenuineIntel_PROCESSOR_CACHE

The specific errors were:

Error : DCACHEL0_EVICT_ERR (Proc 6 Bank 1)
Error : DCACHEL0_EVICT_ERR (Proc 6 Bank 1)
Error : DCACHEL0_EVICT_ERR (Proc 6 Bank 1)
Error : DCACHEL0_EVICT_ERR (Proc 6 Bank 1)
Error : DCACHEL0_EVICT_ERR (Proc 7 Bank 1)
Error : DCACHEL0_SNOOP_ERR (Proc 7 Bank 1)

I stripped the system to bare bones: mainboard, 16GB RAM, CPU + cooler, one drive (OCZ Vertex SSD), 850W power supply, PS2 keyboard, USB wireless mouse.

Is it a bad CPU? Or could there be something else wrong?

Jared · May 6, 2015

Does it not blue screen at all in safe mode?

x BlueRobot · May 6, 2015

If doesn't BSOD at all in Safe Mode, then it will be a hardware issue.

TimTam00 · May 6, 2015

Correct, it doesn't blue screen is safe mode. I recall reading many years ago that safe mode disables the CPU cache, is that right?

x BlueRobot · May 6, 2015

I'm looking into the EVICT and SNOOP error types.

The EVICT request type means that an error occurred during the cache eviction process, the SNOOP request type indicates that an error occurred during a snoop operation, which is one of the methods used to maintain cache coherency. It seems there may be a problem within the caching process.

x BlueRobot · May 6, 2015

TimTam00 said:
Correct, it doesn't blue screen is safe mode. I recall reading many years ago that safe mode disables the CPU cache, is that right?

No, not what I'm aware of.

x BlueRobot · May 6, 2015

x BlueRobot said:
If doesn't BSOD at all in Safe Mode, then it will be a ~~hardware~~ software issue.

Jared, just pointed my mistake!

I think it may be more of a hardware issue though.

TimTam00 · May 11, 2015

I concluded that it was a bad CPU, and exchanged it for another one. Problem solved. Looks like the CPU was faulty!

Wrench97 · May 11, 2015

FYI the Lx Cache on the CPU is Physical memory on the CPU die there is no way to increase it's size through software.

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[SOLVED] whea_uncorrectable_error windows 7 BSOD - HELP

TimTam00

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Jared

Sysnative Staff, BSOD Kernel Dump Expert

x BlueRobot

Administrator

TimTam00

New member

x BlueRobot

Administrator

x BlueRobot

Administrator

x BlueRobot

Administrator

TimTam00

New member

Wrench97

Administrator, Hardware Expert