Intel® Core™ processors
Processor numbers for the Intel® Core™ processor family have an alpha/numerical identifier followed by a three digit numerical sequence.
A higher number within a processor class or family generally indicates more features, including: cache, clock speed, Front Side Bus, Intel® QuickPath Interconnect, new instructions, or other Intel technologies¹. A higher processor number may also have more of one feature and less of another.
Processor numbers for the Intel® Core™2 processor family brands are categorized with an alpha prefix followed by a four digit numerical sequence. The table below explains the alpha prefixes used for the Intel Core 2 processor families.
| Alpha Prefix | Description |
|---|---|
| QX | Desktop or mobile quad-core extreme performance processors |
| X | Desktop or mobile dual-core extreme performance processors |
| Q | Desktop quad-core high performance processors |
| E | Desktop energy efficient dual-core processors with TDP greater than or equal to 55W |
| T | Mobile highly energy efficient processors with TDP 30-39W |
| P | Mobile highly energy efficient processor with TDP 20-29 W |
| L | Mobile highly energy efficient with TDP 12-19W |
| U | Mobile ultra high energy efficient with TDP less than or equal to 11.9W |
| S | Mobile small form-factor with 22x22 BGA package |
Processor numbers for the Intel® Core™2 Quad family have an alpha prefix followed by a four digit numerical sequence. Additionally, low power Intel Core 2 Quad processors are identifiable by an "S" suffix which represents processors having a lower thermal design power.
¹ As Intel processors evolve and advance, Intel will integrate new feature technologies and capabilities that may increment the processor number.