What do the 6×86 revision numbers mean?
A. The number to the right of the decimal point indicates an actual design change or modification. The number to the left of the decimal point indicates the manufacturing technology used. Design changes or modifications do not necessarily mean bug fixes. A design change can occur in order to improve yields. Higher yields produce faster chips that can be sold for more money. The definition of what each design change or modification actually is is confidential information contained in errata sheets. The revision 3.x was a 10% die shrink. We are now seeing 4.x revision parts being produced. The increase in the number to the left of the decimal occurred as a result of new manufacturing technology. We know that this is dual voltage instead of die shrink.
