RHEL 6.4 : using Ivybridge E5-2670v2 CPU only 8 out of 10 cores are shown

Solution Verified - Updated -


  • RHEL 6.4 is running on a server with Ivybridge E5-2670v2 CPUs and only showing 32 vCPUS for the two sockets instead of 40 vCPUs.


  • Red Hat Enterprise Linux (RHEL) 6.4
  • Intel Xeon E5-2670v2 Ivybridge CPU

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