sentence: architectures centos supports only the x86 architectures : x86 with physical address extension ( pae ) ( 32-bit ) x86-64 ( amd 's amd64 , 64-bit ) the following architectures are not supported by centos ( as of version 6 ) : x86 without physical address extension ( pae ) ( as of centos 6 ) ia-64 ( intel itanium architecture , 64-bit ) ( beta support since centos 3 ) powerpc / 32 ( apple macintosh and powermac running the g3 or g4 powerpc processor ) ( beta support since centos 3 ) ibm mainframe ( eserver zseries and s/390 ) ( not centos 5 ) alpha ( centos 4 only ) sparc ( beta support since centos 3 ) a live cd version of centos is available at mirror.centos.org .