Maximum amount of memory for redhat es3 x86 machine

[Bliss, Aaron]

Does anyone know the maximum amount of ram that can be ran on a redhat
enterprise 3 server x86 platform?  I've installed 16 gb into a server;
the os sees all of the memory, however I receive a message on bootup
that says something to the tune of redhat es 3 only needs 8gb of memory;
I would think that all is okay, as the kernel is able to address all 16
gigs without any issue; free shows this:

             total       used       free     shared    buffers
cached
Mem:      16149820     578972   15570848          0      19396
477496
-/+ buffers/cache:      82080   16067740
Swap:      4096048          0    4096048

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