[squid-users] Separate machines for cache and bandwodth management?

Hi,
I have one server Linux 8.0 installed.
Pentium IV.
512 RAM
36 GB SCSI.
Squid 2.5 stable installed working fine as cache
server . ACL's, Delay pools will be handles by same
machine. also acting as router.
Is it necessary to have separate machines for cache
server and separate for bandwidth management(may be
acl/delay pools handling, ect.) OR single machine
squid installed acting as cache server and handling
CAL's and delay pools is O.K.?
How many concurrent users this machine can handle? Is
it O K. for 60 concurrent users (that is 20 % of 300
total users)?
Thanks


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