[encryption]

Originally Posted by Alfa1

On average my board has 1200 concurrent users. This sometimes peaks to 1900. I see this is growing steadily.

I recently got a new server which is as good as it comes ATM. Dual quad core 2.2 Ghz with 15K HD's. All specs as high as possible.

My site runs well and fast. So thus far this is going well. But with how many concurrent users should I expect to be in need of a second server?

when you run out of money to buy the most expensive server to host everything on it and you still have subpar performance, thats the time you're ready to split your forum across 2 machines