As of May 25th I have been running seti@home for two years, 24/7. Of course I have been upgrading and adding more computers to the job, but the one I started with over two years ago is still running strong! OC'd iNtel 300a @ 504mhz. Now I have all 4 of my machines running seti 24/7 and they are all running great! Good cooling is a MUST and backup power is great!