My apologies if this has been answered already - it seems like a question that would have been, but searching for "scalability" doesn't return what I'm looking for.

Basically I'm looking to install the Community Edition of M2 on an Opteron 2Ghz box with a gig of RAM. What is the number of users that I can be expected to scale to? I'm looking at a client who might want 650 users and I'm wondering if it would hold up for that much.

Thanks! Great product!

Matthew Yette