Intel® Xeon® and Itanium® processor numbers are categorized in 4-digit numerical sequences. As shown in the example below, this number plus the processor family comprise the overall "processor name".
Example
This 4-digit processor number indicates both underlying performance-related features and whether the processor is for dual- or multi-processor systems. It also corresponds to the chipset numbering, making it clear which processor goes with which chipset.
A higher number within a processor family can indicate more processor features; more of a specific feature; or a change in architecture. Note that a higher number processor may have more of one feature and less of another.
Specific Intel Xeon and Itanium processor families and their number sequence:
