Intel Xeon UP/DP (Woodcrest) processors
Introduction: June 2006
The Xeon brand refers to many families of Intel's x86 multiprocessing CPUs - for dual-processor (DP) and multi-processor (MP) configuration on a single motherboard targeted at non-consumer markets of server and workstation computers, and also at blade servers and embedded systems. The Xeon brand has been maintained over several generations of x86 and x86-64 processors. Older models added the Xeon moniker to the end of the name of their corresponding desktop processor, but more recent models used the name Xeon on its own. The Xeon CPUs generally have more cache than their desktop counterparts in addition to multiprocessing capabilities. Intel's (non-x86) IA-64 processors are called Itanium, not Xeon.
The Woodcrest core
On 26 June 2006, Intel released the dual-core CPU (Xeon branded 5100 series) codenamed Woodcrest (product code 80556); it was the first Intel Core microarchitecture processor to be launched on the market. It was a server and workstation version of the Intel Core 2 processor. Intel claimed that it provides an 80% boost in performance, while reducing power consumption by 20% relative to the Pentium D.
Most models had a 1333MT/s FSB, except for the 5110 and 5120, which had a 1066MT/s FSB. The fastest processor (5160) operated at 3.0GHz. All Woodcrests used LGA 771 and all except two models had a TDP of 65 watts. The 5160 had a TDP of 80W and the 5148LV (2.33GHz), had a TDP of 40W. The previous generation Xeons had a TDP of 130W. All models supported Intel 64 (Intel's x86-64 implementation), the XD bit, and Virtualization Technology, with the "Demand Based Switching" power management option only on Dual-Core Xeon 5140 or above. Woodcrest had 4MB of shared L2 Cache.
Source: Wikipedia, the free encyclopedia.