Simon Jolle wrote: ... > When would you choose 64 Bit and when 32 Bit? Some applications run faster when they are compiled and run under x86_64. I've seen programs running 30% faster. On i386, each process is limited to 2G RAM address space. My own desktop is Fedora 7 x86_64 with 32bit Firefox (to use plugins that are 32 bits only). All our 64bit servers run x86_64 Centos 5 or RHEL 5.1. Mogens -- Mogens Kjaer, Carlsberg A/S, Computer Department Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark Phone: +45 33 27 53 25, Fax: +45 33 27 47 08 Email: mk at crc.dk Homepage: http://www.crc.dk