INTEL :-Intel® Core™ processors :- Processor numbers for the Intel® Core™ processor family

Processor numbers for the Intel® Core™ processor family

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.