that would depend on what type of application you are talking about.
Is it disk intensive? memory intensive? CPU intensive?
Honestly, best thing to do is to post the thread on the 'Server Room' forum.
perhaps a moderator can transfer this thread there.
it is not a disk intensive
its memory intensive and CPU intensive
still a bit hard to say. are you talking about 500 users simultaneous connections? are you talking about a terminal server? a Web server?