The ThinkPad X240 supports a 1,600MHz processor memory clock speed which is faster than most laptops of this age and type. Most similar spec portable PCs that are a comparable age to it support a 133MHz processor memory clock speed. In addition, this portable PC supports 1 and 333MHz processor memory clock speeds.
This portable PC's memory clock speeds supported by processor (1,600MHz) is actually the best supported memory clock speeds supported by processor across all medium processor core notebook PCs that have been on the market for more than two years.
The worst supported memory clock speeds supported by processor across comparable types of portable PC is 133MHz.