George Woltman wrote:

> My bet is this is a memory subsystem problem.  Memtest is not an
> adequate test. It could be the DIMMs or the on-chip memory controller.
> 
> Try running the small FFT test - that stresses memory less.  If it
> passes then you almost certainly have a memory problem.

I got hold of 25.6 like you suggested, and I'm running 4 threads of the
small FFT test now.  It drove the CPU temp right up to 60, then carried
on to 65-66C, which none of my other tests have done. It's already been
running longer than any other test with 4 instances. 

Progress at last!  It's very disappointing that memtest86+ didn't spot
anything though.  Also, I wonder what to report to my supplier. 
They've been very good with accepting memtest results as proof of bad
memory, but who do I blame this time - the memory or the controller?  


Thanks for your help - also to Martin, Steinar, and others who have
responded. 


/Per Jessen, Zürich

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