About Intel® Processor Numbers

The processor number is one of several factors, along with processor brand, specific system configurations, and system-level benchmarks, to be considered when choosing the right processor for your computing needs.

A higher number within a processor class or family generally indicates more features, but it may be more of one and less of another. Once you decide on a specific processor brand and type, compare processor numbers to verify the processor includes the features you are looking for.

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Microserver, Server, and Workstation Processors

Processor numbers for the Intel® Atom™ processor family are categorized by a four-digit numerical sequence. Server class Intel® Atom™ processors have an alpha prefix of C.

Alpha Suffix Description Example
C Microserver Intel® Atom™ processor C2750

The latest Intel® Xeon® processor numbering system is an alpha numeric representation of product line, product family, and version. Where applicable, an alpha suffix appears at the end of the processor name, which represents the processor line. The version number will not be used in the first processor generation.

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Intel® Xeon® Processor Families and their Number Sequence

Processor Family Product Line System Type
Intel® Xeon® processor E7 Multi-processor
Intel® Xeon® processor E5 Multi-processor
Intel® Xeon® processor E3 Single-processor

Intel® Xeon® and Intel® Itanium® processor numbers are categorized in four digit numerical sequences, and may have an alpha prefix to indicate power and performance.

Alpha Prefix Description
X Performance
E Mainstream (rack-optimized)
L Power-optimized

Intel® Xeon® and Intel® Itanium® Processor Families and their Number Sequence

Processor Family Number Sequence System Type
Intel® Itanium® processor 9000 Multi-processor and dual-processor
Intel® Xeon® processor 7000 Multi-processor
Intel® Xeon® processor 5000 Dual-processor
Intel® Xeon® processor 3000 Single-processor

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