Lower-End Processors
The lower-end Centrino processors typically fall beneath the 2.0 GHz speed rating, including a 1.2 GHz processor and a 1.6 GHz processor. These are the slowest speed processors offered by the Centrino line.
Mid-range
The mid-range Centrino models fall between 2 GHz to 2.5 GHz,and include a 2.13 GHz model, a 2.26 GHz model and a 2.4 GHz model. These are relatively fast units that can keep pace with most desktop models.
High range
Over the 2.5 GHz speed mark is where the faster Centrino processors lay. They include a 2.53 GHz model, a 2.66 GHz model, and a 2.8 GHz model. These processors can keep pace with all but the fastest desktop processors under most circumstances.