What is a Processor Core Stepping?

The first version of a new microprocessor product is the A-0 core step. Later, as improvements are made to the product for functional fixes or manufacturing improvements, the core stepping number is incremented. Generally speaking, minor changes result in an increased number (i.e. A-3 to A-4), while more complex changes result in the letter being changed (i.e. A-3 to B-0). Note that a B-0 core stepping is more recent than an A-4 core stepping.

This applies to:

Intel® Celeron® Desktop Processor
Intel® Pentium® 4 Processors
Intel® Pentium® III Processor
Intel® Pentium® III Xeon® Processor
Intel® Xeon® Processor
Mobile Intel® Celeron® Processors
Mobile Intel® Pentium® 4 Processors - M
Mobile Intel® Pentium® III Processor

Solution ID: CS-001665 (1.0.788091.2563076)
Last Modified: 23-Sep-2014
Date Created: 25-Dec-2002
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