(In reply to madcatx from comment #3)
> I haven't tried any of the fixes suggested there yet. I did however updated
> to 3.17.3 and the box survived yesteday without crashing. Is there anything
> in 3.17.3 that could have fixed or at least partially mitigagted the
> problem? Should I stick with 3.17.2 until you have save more definitive clue
> as to what is causing this?
> 
> It usually takes a few hours for the crash to happen so I might just have
> been lucky though. I'll keep an eye on this report my findings in the "BUG
> 85647" thread.
> 
> Thanks...

Does the GPU still lock up?