P4 2.66GHz 1GBRAM 45trunks + Full Recording in multiserver

Hi
Im trying to have a multi-server setup with the ff specs:
3 Clone desktop(asterisk+vicidial) + 1 Clone desktop(mysql+apache)
-P4 2.66GHz
-1024MB RAM
-SATA HD
using:
SIP & IAX
ztdummy
g.729(3 asterisk+vicidial servers)
any idea what would be the threshold of agents having 3:1 dialing ratio?
10-20 agents?
Im trying to have a multi-server setup with the ff specs:
3 Clone desktop(asterisk+vicidial) + 1 Clone desktop(mysql+apache)
-P4 2.66GHz
-1024MB RAM
-SATA HD
using:
SIP & IAX
ztdummy
g.729(3 asterisk+vicidial servers)
any idea what would be the threshold of agents having 3:1 dialing ratio?
10-20 agents?