quote: However, this problem does not only affect Oodle, and machines that suffer from this instability will also exhibit failures in standard benchmark and stress test programs.

It sounds like a hardware issue, i'm guessing over-agressive memory/cpu tuning, underpowered PSU triggering off behaviour etc. The fact that replacing the processor makes the problem go away does not in itself point to the processor as the issue - you may find that changing the memory also 'fixes' the problem.