Carmel = Centrino version 1
Sonoma = Centrino version 2
Napa = Centrino version 3
To a regular person, Centrino is still Centrino.
Banias = Pentium M version 1 @ 400MHz FSB with 1MB Level 2 Cache
Dothan 400MHz FSB = Pentium M version 2 @ 400MHz FSB with 2MB Level 2 Cache
Dothan 533MHz FSB = Pentium M version 2 @ 533MHz FSB with 2MB Level 2 Cache
To a regular person, Pentium M is still Pentium M.
Actual operating frequency = FSB frequency * Multiplier
To a regular person, the actual operating frequency is all that matters.
A Dothan running at 1.6GHz (400MHz FSB) has a multiplier of 4x.
A Dothan running at 1.6GHz (533MHz FSB) has a multiplier of 3x.
The multiplier DOES NOT matter. It is the operating frequency.
If you get a Sonoma system (i.e. 533MHz FSB system), it is theoretically faster than an older Carmel system (i.e. 400MHz FSB system), but NOT because of the CPU if the CPU is still at the same operating frequency. In fact, the new Sonoma systems show hardly any tangible performance increase over Carmel.
For much more detailed information: http://www20.tomshardware.com/mobile...119/index.html
Notice the benchmarks between a Carmel and Sonoma system. Sonoma shows no great improvement, and pretty much a retreat in the battery life department. The catch is that you probably can't get Carmel systems anymore because they have or are being phased out for Sonoma.