Well, let's look at the obvious possiblities.

Bad CPU

Bad Flash

CPU overheating from cooler fan not seated on CPU properly.

One thing you can try if you do not mind the trouble ( which is where I would start) is to flash back to original bios and replace old CPU to see if your problem disappears.

That is after checking cooler seating of course.

If trouble still persists with old CPU, you can at least rule out defective CPU.



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It's either that or it's into the woodchipper