The Lenovo X1 Carbon supports a 1,600MHz processor memory clock speed which is faster than most portable PCs that have been on the market for a comparable time to it. Most ultrabooks that were released more than two years ago support a 133MHz processor memory clock speed. This portable PC also supports 1 and 333MHz processor memory clock speeds.
This laptop's memory clock speeds supported by processor (1,600MHz) is actually the best supported memory clock speeds supported by processor across all portable PCs of this age and spec.
Across similar types of laptop the worst supported memory clock speeds supported by processor is 133MHz.