https://community.intel.com/t5/Mobile-and-Desktop-Processors/sSpec-stepping-code-mismatch/m-p/228954#M2220 <P>What are the implications of running a dual socket chassis with mismatched sspec or stepping code. I know virtualization documentation asks that the CPU's match but are say windows or linux effected by a mismatch.</P><P></P><P>Does the microcode driver update each cpu with the matching microcode? Does a system call that would relate to a microcode update only get processed on the updated cpu? Will it cause system unstability?</P><P></P><P>If someone can point me to documents explaining this it would be appreciated.</P> Tue, 19 May 2009 19:25:52 GMT idata 2009-05-19T19:25:52Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/sSpec-stepping-code-mismatch/m-p/228954#M2220 <P>What are the implications of running a dual socket chassis with mismatched sspec or stepping code. I know virtualization documentation asks that the CPU's match but are say windows or linux effected by a mismatch.</P><P></P><P>Does the microcode driver update each cpu with the matching microcode? Does a system call that would relate to a microcode update only get processed on the updated cpu? Will it cause system unstability?</P><P></P><P>If someone can point me to documents explaining this it would be appreciated.</P> Tue, 19 May 2009 19:25:52 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/sSpec-stepping-code-mismatch/m-p/228954#M2220 idata 2009-05-19T19:25:52Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/sSpec-stepping-code-mismatch/m-p/228955#M2221 <P>it would depend on the motherboard.</P><P>This link here <A href="http://support.intel.com/support/motherboards/server/sb/cs-010448.htm">http://support.intel.com/support/motherboards/server/sb/cs-010448.htm</A> is specific to a pair of motherboard which says you can have mixed stepping but they cannot be too far apart.</P><P>Best thing to do is to do your own validation. stress test the system, poke and prod it. verify that its stable to suit your needs.</P><P></P><P>OJ</P> Wed, 20 May 2009 10:13:36 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/sSpec-stepping-code-mismatch/m-p/228955#M2221 HERBERT_H_Intel 2009-05-20T10:13:36Z