Stepping (version numbers)
From Wikipedia, the free encyclopedia
Stepping is a designation used by microprocessor manufacturers 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.
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.
Stepping Table, for INTEL microprocessor
This table explains the behavior of the different stepping codes in Intel microprocessor.
|
Stepping |
Processor |
Bus Speed |
Cache Size |
Package Type |
Mfg Tech |
|
A0 |
Pentium XEON |
100 MHz |
1 MB, 2 MB |
S.E.C.C. |
0.18 micron |
|
A1 |
Pentium XEON |
100 MHz |
2 MB |
330 pin |
0.18 micron |
|
A2 |
Pentium XEON |
133 MHz |
256 KB |
S.E.C.C. |
0.18 micron |
|
B0 |
Pentium XEON, 4 |
100 MHz, 400 MHz, 533 MHz |
256KB, 512 KB,1 MB, 2 MB |
S.E.C.C, 330 pin, 478 pin |
0.25 micron, 0.18 micron |
|
B1 |
Pentium M, 4, Celeron M |
400 MHz, 500MHz |
512 KB, 1 MB, 2MB |
478 pin, 479 pin |
0.13 micron, 90 nm |
|
B2 |
Pentium 4 |
400 MHz |
256 KB |
423 pin |
0.18 micron |
|
C0 |
Pentium M, XEON, 4, Celeron M |
100 MHz, 133 Mhz, 400 MHz, 500MHz |
512 KB, 1 MB, 2 MB |
478 pin, 479 pin, 495 pin, S.E.C.C. , 330 pin |
90 nm, 65 nm, 0.18 micron, 0.25 micron |
|
C1 |
Pentium 4, Celeron D |
400 MHz, 533 MHz, 800 MHz |
256 KB, 512 KB, 2 MB |
423 pin, 478 pin, LGA 775 |
0.18 micron, 0.13 micron, 65 nm |
|
CA2 |
Pentium 3 |
100 MHz, 133 MHz |
256 KB |
FC-PGA, SECC2, S.E.C.C.2, pin SECC2 OLGA1 |
0.18 micron, 0.25 micron |
|
CB0 |
Pentium 3 |
100 MHz, 133 MHz |
256 KB |
FC-PGA, SECC2, S.E.C.C.2, 370 pin, 495 pin |
0.18 micron |
|
CC0 |
Pentium 3 |
100 MHz, 133 MHz |
256 KB |
FC-PGA, SECC2, S.E.C.C.2, 370 pin, 495 pin |
0.18 micron |
|
CD0 |
Pentium 3 |
100 MHz, 133 MHz |
256 KB |
FC-PGA, FC-PGA2, 370 pin |
0.18 micron |
|
D0 |
Pentium 4, Celeron D |
400 MHz, 533 MHz, 800 MHz |
256 KB, 1 MB |
423 pin, 478 pin, LGA 775 |
0.18 micron, 90 nm |
|
D1 |
Pentium 4 |
400 MHz, 533 MHz, 800 MHz |
256 KB, 512 KB |
478 pin |
0.13 micron |
|
DP |
Pentium 4 |
400 MHz |
256 KB |
478 pin |
0.18 micron |
|
E0 |
Pentium 4, Celeron D |
400 MHz, 533 MHz, 800 MHz |
256 KB, 1 MB |
478 pin, LGA 775 |
0.18 micron, 90 nm |
|
G0 |
Celeron D |
533 MHz |
256 KB |
478 pin |
90 nm |
|
G1 |
Pentium 4, Celeron D |
533 MHz, 800 MHz |
1 MB |
478 pin, LGA 775 |
90 nm |
|
KB0 |
Pentium 3 |
100 MHz |
512 KB |
S.E.C.C.2 |
0.25 micron |
|
KC0 |
Pentium 3 |
100 MHz, 133 MHz |
512 KB |
242 pin, SECC2, S.E.C.C.2 |
0.25 micron |
|
M0 |
Pentium 4, Extreme |
800 MHz, 1066 MHz |
512 KB, 2 MB |
478 pin, LGA 775 |
0.13 micron |
|
N0 |
Pentium 4, Extreme |
800 MHz, 1066 MHz |
2 MB |
LGA 775 |
90 nm |
|
R0 |
Pentium 4 |
800 MHz |
2 MB |
LGA 775 |
90 nm |
|
TA1 |
Pentium 3 |
133 MHz |
256 KB, 512 KB |
370 pin |
0.13 micron |
|
TB1 |
Pentium 3 |
133 MHz |
512 KB |
370 pin, 479 pin |
0.13 micron |
This information was compiled from the INTEL website.
