> > Personally, I would only install the x86_64 distro if I was reasonably > > sure that I would not require i386 RPMS (or minimal i386 RPMS). > > > > I just use i386 on all workstations and I use x86_64 on servers ... and > > even on servers, only ones that will really be under heavy load or will > > definitely not need i386 packages. What are advantages of 64 bit OS anyway? I was thinking with i386 the max RAM you could have was like 4 gigabyte or something? 64 bit allows quite a bit more, right? I am upgrading a very heavilly used email server to a AMD64 dual core with CentOS. I am staying with i386 since the web GUI we use lists 64bit support as beta and I do not want any problems. The real draw back I see is the max RAM on i386 but perhaps I am wrong. 90 percent of our CPU load is Spamassassin. Disk I/O is likely a big bottle neck as well. Currently we run 2 gigabyte of RAM but will likely move to 4G of DDR2 RAM. Moving from PATA to SATA drives as well. Matt