The Roadrunner specs (Score 1)

Note that this is not a Beowulf cluster, as they wanted to include some components that aren't exactly cheap (eg, the Myrinet).

Nodes: 64

CPU: Dual Pentium II 450's

Cache: 512 Kb ECC RAM

RAM: 512 Mb SDRAM

Hard Disk: 6.4 GB UDMA EIDE

Network: 100BaseT, Myrinet

OS: Linux 2.2.1, Redhat 5.2

Check out Roadrunner or Myrinet

Atticus, a UNM student.