Cluster's right, "you can get Alpha's or Sparc's but these are big bucks". I'v herd of using linux to performSMP network setup, and I have actually seen ane demonstrated by a class at my highschool, they had 12 Pentium Pro system all setup on a standard 10/100 swich with a thirteenth system acting as a terminal, it was pretty interesting seeing the benchmarks against the Pentium II systems back them, If I remember correctly, the linux system blew the PII sky high, The best thing was the 1.53GB of memory (which was HUGE at that time). Now if you are really looking for that kinda power, imagin 12 XP's or P3 Tualatin machines with a linux SMP setup, That would Rock but so would the power bill!!!