Intel used since the year 1998 the brand name for Xeon server processors. Today also models for workstations marketed under this name. Both are based on the respective desktop processors of the corresponding generation. Despite the fundamental similarities, they sometimes use their own base or chipsets. Due to a large variety of available processors, the naming scheme affects initially confusing. Therefore, we have listed the individual series and their features for you below, where you can orient yourself when buying. With us you get used Intel Xeon processors that have two, four or more cores, and refurbished servers and workstations that are already equipped with a Xeon CPU.

3000 series

These processors have between two and six physical cores that allow for few models hyperthreading twice the number of threads. They can be used, depending on the model, for example, on a pedestal 775, 1136 or 1156 motherboard, but not in conjunction with other processors. The maximum clock frequency of 3.76 GHz and L2 cache with 12 MB provide the necessary computing power and faster than latches are up to 32 GB DDR3 memory support. In the field of workstations and servers, especially convenient entry-level models are thus possible, yet offer sufficient computing power for small workgroups or remote offices.

5000 series

Made for dual-processor systems that allow these models with 3.86 GHz at first glance only a slightly higher clock frequency. But who needs a great deal of memory for specific applications, for example, can strike the Intel Xeon E5502. Although this provides only a clock of 1.86 GHz, but can it handle up to 144 GB of DDR3 memory and supports this with ECC function. In addition to several other functions in the area of ??virtualization and power management multiprocessing capability remains the biggest advantage however. These are used models with up to six cores in the socket 771 or 1366 of a motherboard.

6000 series

Here, there are exactly three models, which offer four, six and eight cores. It supports any model of hyper-threading and virtualization professional. The maximum cache is 18 MB and the clock frequency of 2.4 GHz, which is enough power for most applications available, especially since several CPUs can be used in a system with base 1567.

7000 series For use in multi-processor system with socket 604 or 1567 Xeon CPUs this work with a maximum clock frequency of 3.5 GHz. In addition, the cores are up to 16 MB L2 cache or a full 24 MB of L3 cache to the side. In terms of comprehensiveness, are virtualization and energy management in special focus. However, the Hyper-Threading technology is in some models already enabled. If you want to help your system to additional computing power, you can do this very inexpensively through our used Xeon processors.

E3 family

This series is now available in the third one because it is the pendant to the desktop models of the Core i series. The current version number, you agree to the attached abbreviation of the model number, such as v2 in the Intel Xeon E3-1220L. The version specifies the process on which microarchitecture based CPU. So, for example, is v3 for Haswell. Although a higher version is usually more efficient, but the actual differences can be very small. Basic work all models with up to 32 GB of DDR3 memory and depending on the version up to 4.1 GHz Turbo Frequency. With Hyper-Threading, four or eight logical cores ready to have as a fast cache for up to 8 MB of Intel Smart Cache. The biggest advantage of some models, however, is the low thermal power dissipation of up to 20 W and other functions to save energy.

E5 family

As with the E3 family is also a relationship to the desktop models of the Core i series. However, you have here a wider choice, as up to 12 physical cores are possible, which in turn offer hyperthreading twice the number of threads. The core frequency is a maximum of 3.6 GHz and is supported by up to 30 MB Intel Smart Cache. Depending on the type of memory are also 768 GB of ECC DDR3 RAM possible. So power Technically you are open to all possibilities. Depending on the model, two or four CPUs can be operated together in a system that has the appropriate number of bases of type 2011.

E7 family

The current high-performance series of Xeon processors technology offers up to 15 physical cores plus Hyper-Threading. Of course, but also the models with six, eight, ten or twelve cores are available. The core frequency of 3.7 GHz and 30 MB cache are not necessarily far ahead of its predecessors, but offer these models can also in other areas. For additional approximately 1.5 TB of DDR3 ECC memory are possible. Regarding the functional scope as almost all functions are available that can be used for virtualization and data security, as VT-x, VT-d, Intel AES-NI and Secure Key. For particularly demanding applications up to eight processors can be run in a server. This depends on the particular CPU model and of course the motherboard of the server.

information about the model numbers

Occasionally, individual letters are in front of the model number. This point in particular to the TDP of the individual processors. The order of increasing consumption is as follows:

L: less than 65 W
E: 65 to 90 W
X: 90 W
W: 130 W

The first digit of the model number is defined in the rule is appropriate for the type of systems, the processor. A 3 stands for one processor per system, a 5 for two-processor systems, and a 7 for multiprocessor systems. The following numbers indicate generation and functions. While here, a higher number is often better, but you should, if appropriate, inform what features you get with the model and if you use this at all in everyday life.
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