Red Hat Enterprise Linux 6 is architecturally complete, and all supported architectures are now available.

Red Hat Enterprise Linux 6 will not provide support for the Intel® Itanium® architecture. All Itanium-related development will be incorporated into Red Hat Enterprise Linux 5 exclusively. Up to and through March 2014, Red Hat Enterprise Linux 5 will provide support, deliver new features, and enable new Itanium hardware in accordance with the published Red Hat Enterprise Linux product life-cycle. In addition, extended support for Red Hat Enterprise Linux 5 for Itanium is available up to March 2017 from selected OEMs.

On the POWER architecture, Red Hat Enterprise Linux 6 requires a POWER6 or higher CPU. POWER5 processors are not supported on Red Hat Enterprise Linux 6.