1. Tell me, which processor is better for the server rust? 2 x 2.6Ghz or 1 x 3.5Ghz
     
  2. The second option, 1x 3.5.
    The bigger clock freq. = the better performance you get, it doesn't scale for the cores.

    p.s If you run multiple servers on multicore machine - it would be correct to assign an specific cores for each server.
     
  3. whats best way to do that ?

    " it would be correct to assign an specific cores for each server. "
     
  4. You can set processor affinity via your batch script.