The Lenovo T440 supports a 1,600MHz processor memory clock speed which is faster than most laptops of this type and age. Most similar spec notebook PCs that are a comparable age to it support a 133MHz processor memory clock speed. In addition, this Lenovo laptop supports 1 and 333MHz processor memory clock speeds.
A 1,600MHz processor memory clock speed is in fact the best supported memory clock speeds supported by processor across all laptops that have been available for a comparable time to the T440.
The worst supported memory clock speeds supported by processor amongst comparable types of notebook PC is 133MHz.