Configuration Guide
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... 5300 series) Product Code (Intel® Xeon® Processor 5400 series) 2U Passive Heatsink BX80555xxxxP BX80556xxxxP BX80573xxxxP BX80563xxxxxP BX80574xxxxP 1U Heatsink BX80555xxxxA BX80556xxxxA BX80573xxxxA BX80563xxxxxA BX80574xxxxA Notes Compatible Intel® Server Chassis For use in a 1U chassis. For more information on supported processors, see http://support.intel.com/support/motherboards/server/s5000pal/compat.htm...
... 5300 series) Product Code (Intel® Xeon® Processor 5400 series) 2U Passive Heatsink BX80555xxxxP BX80556xxxxP BX80573xxxxP BX80563xxxxxP BX80574xxxxP 1U Heatsink BX80555xxxxA BX80556xxxxA BX80573xxxxA BX80563xxxxxA BX80574xxxxA Notes Compatible Intel® Server Chassis For use in a 1U chassis. For more information on supported processors, see http://support.intel.com/support/motherboards/server/s5000pal/compat.htm...