[Beowulf] Barcelona hardware error: how to detect

Bill Broadley bill at cse.ucdavis.edu
Thu Jun 12 14:04:19 EDT 2008

> Yes, what are currently shipping from AMD are B3 revision processors. The
> TLB-look-aside problem is fixed.
> There are other less-critical problems with B3, however. Specifically,
> power-related compatibility issues with various motherboards due to
> (according to the motherboard manufacturers) AMD changing the TDP late in
> the release process. I can't give any specific names or models that we know
> have problems, however. I can say that everyone involved is working on a
> resolution--usually through PCB revisions of the motherboards. A number of
> 1U power supplies that have previously worked with all Intel and AMD
> solutions are now insufficient, as well, due to 12V limitations. B3 pulls a
> *lot* of power.

I've heard reports of b3 pulling more power than b2, not sure if that's just 
the higher clock speed, or a b3 related change.  Has anyone put a dual socket 
B3 system on a kill-a-watt and tested it under load?

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