Intel Xeon Processor - an overview | ScienceDirect Topics
Intel said to be prepping eight-core Xeon for launch next month | Engadget
Apple Mac Pro A1289 MacPro4,1 (Early 2009/Nehalem) Eight Core Intel Xeon 2x: E5520 @ 2.26GHz / 12GB DDR3 SDRAM / 2TB Seagate ST2000DM006 HDD / OS X Mountain Lion / ATI Radeon HD 5770