The Lenovo X1 supports a faster memory clock speeds supported by processor than most comparable spec portable PCs that came out more than two years ago. This portable PC supports a 1,600MHz processor memory clock speed, whereas most laptops that have been on the market for a comparable time to it support a 133MHz processor memory clock speed. In addition, this notebook PC 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 of this age and type.
The worst supported memory clock speeds supported by processor across comparable types of laptop is 133MHz.