Pentium 4 6×1 C-1 to D-0 Stepping Change

The boxed Intel® Pentium® 4 processors 631, 641 and 651 will undergo the
following changes for the C-1 to D-0 processor stepping conversion:

• CPUID will change from F64 to F65.
• New S-specs for converting products.
• Converting products will change from the 2005 Mainstream FMB (95W) to the 2006
FMB (65W)
• TDP will change from 86W to 65W, Max Icc will change from 100A to 65A, Max
Icc_StopGrant will change from 50A to 40A, Max Icc_Enhanced_auto_halt will
change from 40A to 25A, and thermal profile will change from 05A to 06 thermal
profile.

The boxed Intel® Pentium® 4 processors 631, 641 and 651 will undergo the
following changes for the C-1 to D-0 processor stepping conversion:

• CPUID will change from F64 to F65.
• New S-specs for converting products.
• Converting products will change from the 2005 Mainstream FMB (95W) to the 2006
FMB (65W)
• TDP will change from 86W to 65W, Max Icc will change from 100A to 65A, Max
Icc_StopGrant will change from 50A to 40A, Max Icc_Enhanced_auto_halt will
change from 40A to 25A, and thermal profile will change from 05A to 06 thermal
profile.
• The Electrical, Mechanical and Thermal Specifications remain within the
current specifications. Intel anticipates no changes to current customer
platforms designed to Intel guidelines
• Converting products will ship in the Alternate Equivalent package only. While
the packages are visually different, Intel anticipates no changes to customer
platforms designed to Intel guidelines (Please see below)

Intel 3 Pentium 4 6x1 C 1 to D 0 Stepping Change

The Platform Compatibility Guide indicating the processor FMB
will be changing from 05 to 06 to the processor mark as illustrated with the
following example:

Intel 4 Pentium 4 6x1 C 1 to D 0 Stepping Change

Intel 5 Pentium 4 6x1 C 1 to D 0 Stepping Change

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