Dell Yonah notebooks revealed
 

The documents seen by the Inquirer are using the 'old new' Intel naming scheme, but since they are both awful enough to be ignored, you can just use the numbers. They are as follows:

PWS M90 - Intel Yonah 756 (1.66GHz/2MB L2 cache/667MHz FSB)
PWS M90 - Intel Core T1300 (1.66GHz/2MB L2 cache/667MHz FSB)
PWS M90 - Intel Core T1400 (1.83GHz/2MB L2 cache/667MHz FSB)
PWS M90 - Intel Core T1500 (2.00GHz/2MB L2 cache/667MHz FSB)
PWS M90 - Intel Core T1600 (2.16GHz/2MB L2 cache/667MHz FSB)

http://www.theinquirer.net/?article=28454