Introduction | Intel® Core™ Processor Family | Pentium® Processors | Celeron® Processors | Intel Xeon® and Itanium® Processor

Intel® Core™ processors

Processor numbers for the Intel® Core™ brands are categorized in 4-digit numerical sequences with an alphabetical prefix.

This 5-character identifier captures the power and performance class and features of Intel® Core™ processors. The letter prefix indicates the power and performance class.

A higher number in a power and performance class generally indicates more features, including:

Cache

Clock Speed

Front Side Bus

New Instructions

Other Intel® technologies¹

Note that a higher number processor may have more of one feature and less of another.

Processor Classes

Letter prefixes indicate a processor class. This is based on a range of power or performance, under which each particular processor's specific power level or performance type resides. Example: a 31W Intel® Core™ Duo processor uses a "T" prefix because 31W falls between 25W and 49W and is therefore a highly energy-efficient processor.

Specific power classes and their number sequence

Processor Class	Processor Class	Processor Class	Processor Class	Processor Class	Processor Class	Processor Class
Desktop or notebook extreme Performance	QX6000 X6000
Desktop quad-core performance		Q6000
Desktop energy-efficient dual-core TDP ≥ 55W			E6000 E4000
Notebook highly energy-efficient TDP 30-39W			T7000 T5000	T2000		T1000
Notebook highly energy-efficient TDP 12-19W			L7000	L2000
Notebook ultra-high energy-efficient TDP ≤ 11.9W			U7000	U2000	U2000	U1000
	View details	View details	View details	View details	View details	View details

Letter prefixes

Some processor numbers also include an alphabetical prefix.

• Power and performance prefixes explained

For more information

Explore the processor in your current PC. Download a processor identification utility to learn about your processor's brand family, specific features and technical attributes.