Sme ver. 5.1.2 (latest ?) on a P1 166 24mb ram, Parallel ecp+epp, It's just a router printerserver so i think that should be enough.
5 Windows clients : compraq's (*kuch*) 133 64 mb
Printer xerox 4512 20 mb mem.
I use the same cable, so i don't expect any problems there.
It's gotten a little faster since i've changed ecp+epp ver. 1.9 to 1.7
But it still takes 5 mins. to print a 400 kb page.
A few errors in the logs, but i don't think it has anything to do with the speed problem : cannot lock db.xerox4512 - interrupted sytem call
Only occurs about once a day, and i use it all day long.