The traditional definition was doing multiple operations at the same time. SIMD, SMP, multicore, and clustering would qualify. So, yeah, you could do parallel processing in dual- or quad-CPU configuration. Beowulf clusters started with 486 using MPI and PVM. So, scale the Pentium Pro's up and out.
EDIT: Glanced at Wikipedia out of curiosity. Forgot it was used in ASCI Red. So, definitely can use them for parallel computing. To pass a teraflop, you just need 1,600 sq. ft. of them running at 850 kW. ;)
EDIT: Glanced at Wikipedia out of curiosity. Forgot it was used in ASCI Red. So, definitely can use them for parallel computing. To pass a teraflop, you just need 1,600 sq. ft. of them running at 850 kW. ;)
https://en.wikipedia.org/wiki/ASCI_Red