Comment # 14 on bug 986352 from Jimmy Berry

(In reply to Egbert Eich from comment #13)
> Could it be a power issue? If one of the power rails get under voltage due
> to the GPU drawing too much power a lockup could occur.
> Try swapping the PSU.

I had considered the possibility and figured I'd try swapping out most/all of
the hardware one at a time, but also seems odd that the issue never occurred on
Windows. It could be something related to specific instructions, loads, or
power saving algorithms. I swapped out RAM as well.

The only time I had a faulty PSU the machine would reboot anytime it would
increase load. Granted that may not account for all possible failures.

Anyway, I had an 850W PSU sitting around so I swapped out the one in the
machine for it. We'll see how the machine does for the next day or so and I'll
report back.