Which releases of Red Hat Enterprise Linux are required for Fujitsu Siemens support of the Intel Dunnington CPUs?

Release Found: Red Hat Enterprise Linux 4.7 and later and 5.2 and later

The Intel Dunnington set of CPU's, L7445/E7430/E7450/X7460, are supported by Fujitsu Siemens Computers under Red Hat Enterprise Linux 5.2 and later Red Hat Enterprise Linux 4.7 and later.