did you ask a red hat rep ? they are glad to answer questions .
seeing as you ARE planning on spending $ $349 to 1299/year for a red hat REQUIRED server license
http://www.redhat.com/rhel/purchasing_guide.html
also most hardware is not listed only a few chip sets do not work well
and a very small section of hardware dose not work - mostly proprietary usb dongles
for the hp server
Linux 64 bit ( RHEL 6.2 64 bit )will run very well on
-- Intel Xeon 5600
-- Up to 384 GB ram