RHEL 7 only supported x86_64, so CentOS 7 only "officially" supports x86_64. While AArch64, i386, and other arch builds are available from the AltArch SIG, the

RHEL 7 only supported x86_64, so CentOS 7 only "officially" supports x86_64. While AArch64, i386, and other arch builds are available from the AltArch SIG, they aren't maintained by the core. With RHEL 7 supporting AArch64 after this announcement, I'd assume CentOS will follow suit.