The Lenovo x1 supports a 1,600MHz processor memory clock speed which is faster than most similar spec notebook PCs that have been on the market for a comparable time to it. Most ultrabooks that have been available for a similar time to it support a 133MHz processor memory clock speed. This notebook PC also supports 1 and 333MHz processor memory clock speeds.
This portable PC's memory clock speeds supported by processor (1,600MHz) is in fact the best supported memory clock speeds supported by processor amongst all ultrabooks that were launched around the same time as the x1.
Amongst comparable types of portable PC the worst supported memory clock speeds supported by processor is 133MHz.