http://blogs.technet.com/b/omers/archive/2012/05/05/released-processor-query-tool-v1-1.aspxProperly calculating the SPECint 2006 rate value of your planned mailbox role processors is a critical step in the overall planning and design of your Exchange 2010 architecture. The SPECint 2006 rate value is used by the Mailbox Server Role Requirementsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)