Original Intel Xeon W3530 2.8 GHz Quad-Core (BX80601W3530) Processor CPU 735858213844 | eBay
Intel BX80601W3530 Xeon W3530 Four Core 2.8GHz... at MacSales.com
AT80601000897AB Intel Xeon W3530 2.8GHz SLBKR Server CPU
Apple Mac Pro A1289 MacPro5.1 (Mid 2010/Nehalem) Quad Core Intel Xeon W3530 @ 2.8GHz / 12GB DDR3 SDRAM / 1TB Western Digital WD10EZX HDD / OS X Mountain Lion / ATI Radeon HD 5770