Intel XEON QUAD-CORE CPU 1.6GHz/8MB/1066 SL9XRGeneral information Type CPU / Microprocessor Family Intel Xeon Processor number E5310 Part number HH80563QH0258MBX80563E5310ABX80563E5310P Frequency (GHz) 1.6 Bus speed (MHz) 1066 Package type 771-land FC-LGA6/mLGA Socket type Socket 771 (LGA771) For more items, please check http://shop.eCRATER.com/gfsi/m.html?_nkw=&_armrs=1&_from=&_ipg=25#