Ken Seefried wrote:
The ASCI Red supercomputer built by Intel used PPros;
see
http://www.ai.mit.edu/projects/aries/course/notes/ascii_red.pdf. I
think the compute nodes were pretty off-the-shelf SMP PPro designs, so
some might consider it off-topic.
Bit more info for the PDF-impaired:
http://www.pact.sscc.ru/hardware/computer/#IntelASCIRed
(plus two of the three 'see also' links still seem to work!)
cheers
J.