The browser version you are using is not recommended for this site.
Please consider upgrading to the latest version of your browser by clicking one of the following links.

Support

Learn about Processor Core Stepping


Last Reviewed: 03-Mar-2016
Article ID: 000006708


The first version of a new microprocessor product is the A-0 core step. As we make functional fixes or manufacturing improvements, the core stepping letter and/or number is incremented. Minor changes result in an increased number (for example, A-3 to A-4), while more complex changes result in the letter being changed (for example, A-3 to B-0). B-0 core stepping is more recent than an A-4 core stepping. 

This article applies to: