[Beowulf] Re: MS Cray

Michael H. Frese Michael.Frese at NumerEx-LLC.com
Thu Sep 18 11:51:07 PDT 2008


My office clusters are plugged into 25 A circuits that are relatively 
common in office buildings.  That still doesn't quite get you 3 
kW.  But any company spending $80k for a computer will spend a 
kilobuck or so more to upgrade the wiring and panel.

At 12:21 PM 9/18/2008, Mark Hahn wrote:
>>Note that for the fully populated enclosure the power supplies are dual, i.e.
>>2* 1600W = 3200W.
>
>I see that now.  question for electrical-code enthusiasts on the list:
>isn't a normal "15 amp" office circuit actually supposed to only be 
>used up to 12 amps?  that would mean 12*120=1440; in other words, 
>each 1600W PS needs a special circuit.  also, isn't it pretty common 
>for an office duplex receptacle to be fed by a single (15A) circuit?
>
>I guess what really surprises me is that Cray doesn't mention ScaleMP,
>which would seem to suit this box ideally.  if someone wants Windows,
>I'd very much expect them to want the convenience of ignoring the fact
>that memory is distributed...
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