A few days ago someone was asking whether 100MHz pentium was enough to do what looked like a small routing job. My guess at the time was that much less was needed but I didn't have any data. Now I do. I have a 486 acting as a firewall on a .5Mb DSL line. For what it's worth, dmesg says: Calibrating delay loop... 16.38 BogoMIPS Memory: 14572k/16640k I just scp'd about 15MB over that connection (took about 7-8 min) and watched the load average while it was happening. It converged to zero.