[geeks] distributedfolding

[Dave McGuire]

On Tuesday, January 14, 2003, at 02:02 PM, Joshua D Boyd wrote:
>>   Nope.  The C90 is a much older machine, first shipped in 1990 or
>> 1991.  The T90 was the first one to top it performance-wise, though, 
>> at
>> 2 GFLOPS per processor.  The C90 cranks out 1 GFLOP per processor.  
>> The
>> J90 was intended as a lower-cost (starting at ~$300K for a minimal
>> uniprocessor config), lower-performance (CMOS, air-cooled, 220V, no
>> MGs, no heat exchangers, etc) machine.
>
> MGs?

   Motor-Generators.  A big 60Hz motor driving a big 400Hz generator.  
Running the rectifiers & regulators at 400Hz instead of 60Hz makes the 
magnetics and filter capacitors much, much smaller & lighter.

>>   (And for all you x86 overclockers out there who might turn your 
>> noses
>> up at those numbers...these figures are for what your Intel processors
>> would call "double-precision". ;))
>
> Aren't they what most processors would called double precision?

   Pretty much.  The Cray's idea of single precision is 64 bits.

       -Dave

--
Dave McGuire           "She's a cheek pincher.  I have scars."
St. Petersburg, FL                          -Gary Nichols