Intel Server Processor Hardware Guide

3000-series "Conroe"

The 3000 series, codenamed Conroe (product code 80557) dual-core Xeon (branded) CPU, released at the end of September 2006, was just rebranded version of the Intel's mainstream Conroe otherwise branded as Core 2 Duo (for consumer desktops). Unlike most Xeon processors, they only support single-CPU operation. They use Socket T (LGA775), operate on a 1066 MHz front-side bus, support Enhanced Intel Speedstep Technology and Intel Virtualization Technology but do not support Hyper-Threading. Intel Processors with a number ending in "5" have a 1333 MT/s FSB.^[6]

3100-series "Wolfdale"

The 3100 series, codenamed Wolfdale (product code 80570) dual-core Xeon (branded) CPU, was just rebranded version of the Intel's mainstream Wolfdale featuring the same 45 nm process and 6 MB of L2 cache. Unlike most Xeon processors, they only support single-CPU operation. They use Socket T (LGA775), operate on a 1333 MHz front-side bus, support Enhanced Intel SpeedStep Technology and Intel Virtualization Technology but do not support Hyper-Threading. There is currently only one representing in this class named E3110.

3200-series "Kentsfield"

Intel released relabeled versions of its quad-core (2x2) Core 2 Quad processor as the Xeon 3200-series (product code 80562) on 7 January 2007. The 2x2 "quad-core" (dual-die dual-core) comprised two separate dual-core die next to each other in one CPU package. The models are the X3210, X3220 and X3230, running at 2.13, 2.4 and 2.66 GHz, respectively.  Like the 3000-series, these models only support single-CPU operation and operate on a 1066 MHz front-side bus. It is targeted at the "blade" market.

3300-series "Yorkfield"

Intel released relabeled versions of its quad-core (2x2) Core 2 Quad processor as the Xeon 3300-series (product code 80569) comprised two separate dual-core die next to each other in one CPU package and manufactured in a 45 nm process. The models are the X3320, X3350 and X3360, running at 2.50, 2.66 and 2.8 GHz, respectively. The L2 cache is a unified 6 MB per die (except for the X3320 with a smaller 3 MB L2 cache per die), and a front-side bus of 1333 MHz. All models feature Intel 64 (Intel's x86-64 implementation), the XD bit, and Virtualization Technology, as well as "Demand Based Switching".

5300-series "Clovertown"

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 has been usually implemented with two Woodcrest dies on a multi-chip module, with 8 MB of L2 cache (4 MB per die). Like Woodcrest, lower models use a 1066 MT/s FSB, and higher models use a 1333 MT/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 2.66 GHz. The E and X designations are borrowed from Intel's Core 2 model numbering scheme; an ending of -0 implies a 1066 MT/s FSB, and an ending of -5 implies a 1333 MT/s FSB.  All models have a TDP of 80 W with the exception of the X5355, which has a TDP of 120 W. A low-voltage version of Clovertown with a TDP of 50 W has a model numbers L5310, L5320 and L5335 (1.6, 1.86 and 2.0 GHz respectively). The 3.0 GHz X5365 arrived in July 2007, and became available in the Apple Mac Pro on 4 April 2007.  The X5365 is among the fastest processors, performing up to around 38 GFLOPS in the LINPACK benchmark.

5400-series "Harpertown"

On 11 November 2007 Intel presented Yorkfield based Xeons - called Harpertown (product code 80574) - to the public. This family comes with a dual die quad-core manufactured on a 45 nm process and featuring 1333 to 1600 MHz front-side bus, the TDP is rated from 50 to 150 Watts depending on the model. All models feature Intel 64 (Intel's x86-64 implementation), the XD bit, and Virtualization Technology, as well as the "Demand Based Switching", except the E5405, which lacks this feature. The supplementary character in front of the model-number represents the thermal rating: an L depicts an TDP of 50 Watts, an E depicts 80 Watts whereas a X is 120 Watts TDP or above. The speed of 3.00 GHz comes as four models, two models with 80 Watts TDP two other models with 120 Watts TDP with 1333 or 1600 MHz front-side bus respectively. The fastest Harpertown is the X5482 whose TDP of 150 Watts is higher than those of the Prescott-based Xeon DP but having twice as many cores. (This CPU is also sold under the name "Core 2 Extreme QX9775" for use in the Intel SkullTrail system.)

Intel 1600 MHz front-side bus Xeon processors will drop into the Seaburg chipset whereas several mainboards featuring the Intel 5000/5200-chipset are able to run the processors with 1333 MHz front-side bus processors. Seaburg features support for dual PCIe 2.0 x16 slots and up to 128 GB of memory.

7300-series "Tigerton"

The 7300 series, codenamed Tigerton (product code 80565) is a four-socket (packaged in Socket 604) and greater capable quad-core processor, consisting of two dual core Core2 architecture silicon chips on a single ceramic module, similar to Intel's Xeon 5300 series Clovertown processor modules. It was announced on 5 September 2007, and is currently shipping.

The 7300 series uses Intel's Caneland (Clarksboro) platform.

Intel claims the 7300 series Xeons offer more than twice the performance and more than three times the performance per watt as Intel's previous generation 7100 series. The 7300 series' Caneland chipset provides a point to point interface allowing the full front side bus bandwidth per processor.

The 7xxx series is aimed at the large server market, supporting configurations of up to 32 CPUs per host.