Performance question

Hello!

I have tried to figure out wich affect less to hw performance
(the server is equipped with Intel PPRO 200/192MB/1x20GB IDE/66)

To have lots of tables, say 30-40 pcs with 300-500 rows per table
or 5-10 tables with over 3000 rows each.

In rush hous there can be 20-40 simultaneous users in this system.

Do i have too old (aka slow) server to this job.

-jori luoto