In the article, Dan Zhang is able to take a 1.8GHz Pentium M to 2.4GHz. It’s a pretty simple mod, but you have to go out of your way to do it since Sonoma laptops never shipped with a 400MHz FSB ...

Introduced in 2004, the second-generation Pentium M (code-named Dothan) uses the same chip package but is built with 90 nm circuits rather than 130 nm. Dothan added support for the PCI Express bus ...