Intel Xeon UP/DP (Clovertown) processors
Introduction: November 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 Clovertown core
A quad-core (2x2) successor of the Woodcrest for DP segment, consisting of two dual-core Woodcrest chips in one package similarly to the dual-core Pentium D branded CPUs (two single-core chips) or the quad-core Kentsfield. The Clovertown had been usually implemented with two Woodcrest dies on a multi-chip module, with 8MB of L2 cache (4MB per die). Like Woodcrest, lower models used a 1066MT/s FSB, and higher models used a 1333MT/s FSB. Intel released Clovertown, product code 80563, on 14 November 2006 with models E5310, E5320, E5335, E5345, and X5355, ranging from 1.6 to 2.66GHz. The E and X designations were borrowed from Intel's Core 2 model numbering scheme; an ending of -0 implied a 1066MT/s FSB, and an ending of -5 implies a 1333MT/s FSB. All models had a TDP of 80W with the exception of the X5355, which had a TDP of 120W. A low-voltage version of Clovertown with a TDP of 50W had a model numbers L5310, L5320 and L5335 (1.6, 1.86 and 2.0GHz respectively). The 3.0GHz X5365 arrived in July 2007, and became available in the Apple Mac Pro on 4 April 2007. The X5365 was among the fastest processors, performing up to around 38GFLOPS in the LINPACK benchmark.
Source: Wikipedia, the free encyclopedia.