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.
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.
The latest Intel® Xeon® processor numbering system is an alpha numeric representation of product line, product family, and version. An "L" suffix will be used to identify a low power processor. The version number will not be used in the first processor generation.
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.