New machine

[Roger Jochem]

I'm building a new web server / mail server this month. The last one is 
becoming really slow in mail processing... It's a 2 years old machine, it's 
allready retirement time for that machine. Today CPU and memory are in some 
parts of the day in max utilization.

I'm thinking in a Pentium D 930 3 Ghz Dual Core 2x2mb chache with 1 Gb of 
memory, and 2 SATA disks (80 Gb each). Is this a good machine for the 
service? Is somebody using 64 bits machine for this kind of server? Would a 
64 bits machine perform a better job?

I'm using Centos 3 in the actual machine. In the new one I would consider 
Centos 4 (maybe the 64 bits version, if 64 bits machine would do a better 
job).

This machine should deal with 20.000 messages / day (about 1 Gb in size), 
mcafee, clamav, bitdefender, mailwatch, spamassassin, mysql, php and apache 
2.

Any suggestions or ideas would be appreciated!

Regards

Roger Jochem