The (30 day trial) version of Red Hat Enterprise Linux available for download at www.redhat.com
supports up to 2 CPUs.
My server has a Intel® Quad-Core processor and I am running RHEL 5.2 x86-64 (limited to 2 CPUs). So that means the OS is not harnessing the full power of the CPU. Am I right?
Would it be a good idea to use CentOS 5.2 x86-64 instead if I don't want paid support? (for harnessing the full power of the CPU)?