Quantum ChromoDynamics (QCD) Special Purpose Machines

• Here the case for special purpose machines is less compelling than for GRAPE as QCD is “just” regular (easy to parallelize; lowish communication) and extremely floating point intensive.

• We illustrate with two machines which are classic MIMD distributed memory architecture with optimized nodes/communication networks

BNL/Columbia QCDSP 400 Megaflops

Univ. of CP-PACS (general physics) 600 Megaflops

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