SERVER.CFG-FPS_MAX TO CSS BIG PROBLEM

[iraqforever]

bandwidth rates / settings CSS
English:
Server os: Windows Server 2008 R2
Processor: Intel Core [TM] 2 Duo T7500 2.20GHZ processor
RAM: 4 GB DDR2
Game(s): Counter-Strike Source

20/2 Mbps


I just need to know how many slots should I run
and how much should I run with fps_max.


how to find the server settings bandwidth rates / settings
And where can I read about it
So on Internet.

I hope you can help me with this here big problem