My bugcheck list says that 0x7F can indicate a mismatch of memory modules or defective memory as one possible cause - have you put any ram in lately?
Another possible is heat buildup from overclocking.
Installing incompatible applications, drivers or services can also produce it.
It involves Intel CPU's rather than Athlon - don't know why that is.
If you recently upgraded hardware, is it possible that you might have scratched a trace on the mobo, or knocked a component ( hope not!)?
0x7F bugs can also be titled 'Unexpected Kernel Mode Trap'. This means, I think that the execution of instructions the CPU is involved in is not to do with such as games software but system software, which is trusted - but I do not know enough on the subject of debugging to be sure. Perhaps you can glean some more info from the web or someone else on here.
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