HP Workstation Z400 FM066UT#ABA Xeon W3550 (3.06GHz) 6GB DDR3 500GB HDD Windows 7 Professional 64-bit - Newegg.com
Amazon.com: Dell Precision T3500 Tower High Performance Business Desktop, Intel Core XEON-W3550 3.06GHz up to 3.33GHz, 12GB RAM, 500GB HDD, 256GB SSD (Boot), DVD, Windows 10 Professional (Renewed) : Electronics
LOT OF 3 Intel Xeon W3550 Quad Core 3.07GHz 8MB 2400MHz Socket 1366 SLBEY | eBay