The X1 Carbon supports a 1,600MHz processor memory clock speed which is faster than most laptops that have been on the market for more than two years. Most ultrabooks that are a similar age to it support a 133MHz processor memory clock speed. This Lenovo portable PC also supports 1 and 333MHz processor memory clock speeds.
This notebook 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 released more than two years ago.
The worst supported memory clock speeds supported by processor across similar types of notebook PC is 133MHz.