Newbie help!

[P.Jackson]

Right basically got my hands on a

8x 3GHz xeon cores (huge cache)
8Gb ram
1x HDD

Running centOS

Which i know is powerful to pretty much run whatever i chuck at it , however a few problems..

Registration , REG seems to be well random sometimes good sometimes having to shoot a user 5times in the head.

FPS - the fps is stable and constant however its allways stuck on 166 im checking this via rcon stats.

Like i said im a totally beginner with linux as im used to running servers on windows.

Any help for a newb would be appreciated