I've been running HS since the beginning of 2000 on the same box, a 450 PII. I have added a BUNCH of stuff since then, 14 motion sensors, HVAC, CADDX, W800, many many Leviton and Swtichlinc devices. 5 PC's one audrey, and finally I've upgraded the core.

FYI New Dell 400SC 2.4ghz server for $249 free shipping!! Can't beat it! Migration has gone super easy. Per Rupp's directions installed HS, ran the updater and got the most recent versions and then copied the whole folder from the old to new box. Smooth!