RHEL5 on x86 could not recognize more then 4GB of memory

Solution Verified - Updated -

Issue

  • Red Hat Enterprise Linux 5 on x86 could not recognize more then 4GB of memory.

Environment

  • Red Hat Enterprise Linux 5.0
  • Dell PowerEdge 2950
  • Intel(R) Xeon(R) CPU X5260 @ 3.33GHz(Dual Core) x2

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