The E31270 says it can host 250-300 players connected at once, but it can host more at a max of 500-600.
Tell me what you think.
Theres a difference between connected players at once and actual slots. You can certainly host 500-600 slots, but when you fill up 500 slots you will have laggy servers and you will overload your box.
This is also dependent on the type of game you run.