In order to incorporate speed enhancements for Yonah Based Processors, Intel
is converting the Intel Core Duo Processors T2600, T2500, T2400 from C-0
Stepping to D-0 Stepping. Intel also plans to conduct conversion of  Core
Solo and Celeron M C-0 processors over three phases.

• A BIOS update is required for D-0 Step Products.
• The D-0 stepping is backwards compatible with the C-0 stepping.
• All C-0 products supported under Intel’s Stable Image Platform Program (ISIPP)
will continue to be supported on D-0 stepping.
• To improve package quality, D-0 Stepping products use a package with Reverse
Geometry Caps. The visible package differences are cosmetic only.

In order to incorporate speed enhancements for Yonah Based Processors, Intel
is converting the Intel Core Duo Processors T2600, T2500, T2400 from C-0
Stepping to D-0 Stepping. Intel also plans to conduct conversion of  Core
Solo and Celeron M C-0 processors over three phases.

• A BIOS update is required for D-0 Step Products.
• The D-0 stepping is backwards compatible with the C-0 stepping.
• All C-0 products supported under Intel’s Stable Image Platform Program (ISIPP)
will continue to be supported on D-0 stepping.
• To improve package quality, D-0 Stepping products use a package with Reverse
Geometry Caps. The visible package differences are cosmetic only.

Core2 Intel Speed Up Yonah CPUs w/ D 0 Stepping