I run SETI@home on a dual 400Mhz celeron system I built myself. I'm always processing two work units at once. It takes about 18.5 hours to complete one work unit. I recently overclocked my celerons to 500Mhz so I'm down to 15.5 to 16 hours per unit.
Thoughts about SETI and SETI@home
What a great way to use up all of those wasted cpu cycles.
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.
