A model shows Intel's Core 2 Extreme Quad-core processor at a global launch in Chennai, India, Tuesday, Nov. 14, 2006. Intel launched Quad-Code Intel Xeon 5300 and Intel Core 2 Extreme Quad-core
Xeon - Wikipedia
HP Part No. 628696-001 Intel Xeon 6 Core E5645 2.40Ghz 12MB Smart Cache 5.86
INTEL XEON CORE 2 DUO QUAD PENTIUM D E6850 Q9400 D945 E6500 E5310 2m 4m 8m used | eBay