Intel® Pentium® processor Extreme Edition 840 and Intel® Pentium® D
processors 840, 830, 820, will undergo the following changes for the A-0 to the
B-0 core processor stepping change:

• CPUID will change from F44 to F47
• B-0 is pin compatible with A-0
• New S-Specs for converting products

 Pentium XE & D Take New B 0 Core

Intel® Pentium® processor Extreme Edition 840 and Intel® Pentium® D
processors 840, 830, 820, will undergo the following changes for the A-0 to the
B-0 core processor stepping change:

• CPUID will change from F44 to F47
• B-0 is pin compatible with A-0
• New S-Specs for converting products

 Pentium XE & D Take New B 0 Core