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Stop Error 7F

post #1 of 28
Thread Starter 
I keep getting this randomly during Windows, during games, during internet browsing, even during complete idle. Any explanations for why?
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post #2 of 28
0x7f is caused by an unexpected kernel mode "trap."

You should be able to troubleshoot this, as 0x7f exceptions, are typically only x86 based. So it is something happening during a 32bit CPU operation. Test your memory before going too crazy with anything else. This error occurs quite often from Bad memory modules.

There are any number of causes of a STOP 0x7f, but typically fall into the following catagories:

Software incompatability.
A bad overclock that gets by the BIOS.
Bad driver
or the worst case senario... failing hardware.

What is the first Parameter (s) of the STOP code? this is important in troubleshooting.

Failing Hardware (the most common cause)
Mismatched memory, or failing memory
Motherboard failure
Video card failure... (but this typically generates a other video problems, long before you actually get a STOP 0x7f)

The most common first parameters are as follows, with their meanings:

0x00000000 Divide by Zero Error: this is normally associated with a memory fault. Test your memory using MemTest. If Memtest passes, you have another piece of hardware failing. This parameter can also indicate failing memory on a video card.

0x00000004 Overflow: The overflow instruction occurs when the processor executes a call to an interrupt handler when the overflow (OF) flag is set. This will typically point to bad driver software. Kernel stack overflows are almost always caused by faulty kernel-mode drivers.

0x00000005 Bounds Check Fault: Although this can point to hardware, it normally points to a software problem (incompatability)

0x00000006 Invalid Opcode: The most common cause of this is memory corruption. This can occur in both system and Video memory.

0x00000008 Double Fault: This means that a second fault occurred before the OS could report the first error. The two primary causes for this are faulty hardware and software kernel stack overflows. Hardware problems are usually related to CPU, RAM, or Motherboard system bus failures. Software problems are usually associated with drivers.
Edited by xandypx - 1/31/10 at 5:22pm
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post #3 of 28
Thread Starter 
Its 0x00000008.
I hope my RAM isn't failing, although ive been running it at 2.0 V for a while, when its rated voltage is 1.8V...
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post #4 of 28
Quote:
Originally Posted by wolfrifle16 View Post
Its 0x00000008.
I hope my RAM isn't failing, although ive been running it at 2.0 V for a while, when its rated voltage is 1.8V...
Definately run MemTest on your Ram... It's the first place to start. and in the words of Forrest Gump, "that's all I have to say about that."
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post #5 of 28
Thread Starter 
Ran memtest, no errors.
What else could possibly be the cause?
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post #6 of 28
For both 7F and 124 up your VCore (and maybe VTT).
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post #7 of 28
Thread Starter 
Quote:
Originally Posted by leppie View Post
For both 7F and 124 up your VCore (and maybe VTT).
It can't be vcore, I've ran several passes of IBT and everything seemed to be stable. Its very odd =\\
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post #8 of 28
Quote:
Originally Posted by wolfrifle16 View Post
It can't be vcore, I've ran several passes of IBT and everything seemed to be stable. Its very odd =\\
Since when does IBT test vcore exclusively?

For vcore stabilty use Prime95 small FFT.
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post #9 of 28
How many passes of IBT. Several could be three passes which isnt enough. Also it depends on if its set to max or not on how much it actually stresses the cpu.
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post #10 of 28
You want to rule out everything else before you just decide that the Mobo is dieing, since your memory seemed to pass testing. The easiest thing to do, would be trying to remember, what you installed in the way of new hardware, or software (including driver software), right before this error started to occur. Since I previous mentioned that this error is usually x86 based, software would be 32bit (but that probably encompasses all of the software on your system, with the exception of your OS.) If you can eliminate something new, you may easily determine the cause of the error if it is software or hardware based, by removing the hardware, or software, and seeing if the problem goes away. Also, double check the crash error log in Win7, to see if by chance, windows has logged any errors that it may have recovered from, before the BSOD with the x07f code. There is a possibility that the errors got logged into a crash dump file. The dump files should be located in your “C:\\Windows\\Minidump” Directory.

If you see an error that you can identify as one of these BSOD, find the associated “crash Dump” file (probably the newest). If you can find this, put it into a “zip” file (OCN won’t allow you to upload a dump file, but a zip file is acceptable), and upload it with a post. I will take a look at the file, as my time permits, and see if I can point you in the right direction. No guarantees… but I will try.
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