Intel Xeon W5580 workstation desktop processor • The Register
Apple Mac Pro A1289 MacPro4,1 (Early 2009/Nehalem) Eight Core Intel Xeon 2x: E5520 @ 2.26GHz / 8GB DDR3 SDRAM / 500GB Seagate ST500DM002 HDD / OS X Mountain Lion / Nvidia GeForce GT 120
Mac Pro (Early 2009) - Technical Specifications
Intel Xeon Processor - an overview | ScienceDirect Topics
Mac Pro 2009 MAXED 3.46 GHz 6-Core / 64GB RAM Processor Tray / Intel Xeon X5690 | eBay
Xeon - Wikipedia
Intel's Cooper Lake Plans: The Chip That Wasn't Meant to Exist, Fades Away
Pair Delidded Intel Xeon 3.33GHz Hex X5680 IHS Removed 2009 4,1 Mac Pro | eBay
New Workstation Kingpins Intel Xeon W-3400 Xeon W-2400 and W790 Launch
Apple Mac Pro MB871LL/A A1289 2x Intel Xeon 2.66GHz 8GB 500GB Desktop – comstarinc
Intel Xeon Inside Sticker 18.5 x 24mm 2009 Nehalem Version For Desktop | eBay
Intel BX80601W3530 Xeon W3530 Four Core 2.8GHz... at MacSales.com
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