Stepping is a designation used by Intel and AMD to identify how much the design of a microprocessor has advanced from the original design. The stepping is identified by a combination of a letter and a number. Intel Corporation (NASDAQ: INTC, SEHK: 4335), founded in 1968 as Integrated Electronics Corporation, is a U.S.-based multinational corporation that is best known for designing and manufacturing microprocessors and specialized integrated circuits. ...
Advanced Micro Devices, Inc. ...
Microprocessors, including an Intel 80486DX2 and an Intel 80386. ...
Typically, the first version of a microprocessor comes out with stepping A0. As design improvements occur, later versions are identified by changes in the letter and number. Changes in the number (for example, A3) indicate minor design changes, whilst changes to both the letter and number are made following more extensive changes (for example, B2). Stepping allows consumers and servicers to identify a microprocessor's version.
Processor Brand Name Branded name assigned by Intel Corporation to a specific processor, e.g. Intel(R) Pentium(R) III processor.
Family Message This classification indicates the Intel microprocessor generation and brand. For example, Family 6 (sixth generation) Intel microprocessors include Intel Celeron(R), Pentium(R) II, Pentium II Xeon(TM), Pentium III and Pentium III Xeon processors. Family 5 (fifth generation) includes the Pentium processor and the Pentium processor with MMX(TM) technology.
This information can be useful for validating information from the "Quick Reference Guide" that is available for the specific family of your processor.
Type Message "Type" indicates whether the Intel microprocessor was designed for installation by a consumer (end user) or by a professional PC system integrator, service company, or manufacturer. Type 1 indicates that the microprocessor was intended for installation by a consumer (e.g. upgrade such as an Intel OverDrive(R) processor). Type 0 indicates that the microprocessor was intended for installation by a professional PC system integrator, service company or manufacturer. The processor type depends on whether the processor is a single processor, dual processor, or an Intel OverDrive processor.
Model Message The "model" number identifies to Intel the microprocessor’s manufacturing technology and design generation (e.g. Model 4). Model number is used along with family to determine which specific processor in a family of processors that your computer contains. This information is occasionally needed when communicating with Intel to identify the particular processor.
Stepping Message The "stepping" number indicates design or manufacturing revision data for production Intel microprocessors (e.g. Stepping 4). Unique stepping numbers indicate versions of processors to facilitate change control and tracking. Stepping also allows an end user to identify more specifically which version of the processor their system contains. This classification data may be needed by Intel when trying to determine the microprocessor’s internal design or manufacturing characteristics.
Revision Message The "revision" number indicates version information for Intel processors within a stepping. The revision information may be useful when communicating with Intel to determine the processor’s internal characteristics.