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 ...

Both chipsets support PCI Express. For Pentium M. 855PM includes an AGP 4x slot, and 855GM includes graphics. Supports up to 2GB of DDR RAM. For Pentium 4, advanced 800 series chipset. Supports ...

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 ...