The Lenovo X230 supports a 1,600MHz processor memory clock speed which is faster than most laptops that have been around for more than two years. Most medium processor core notebook PCs that are a similar age to it support a 133MHz processor memory clock speed. This portable PC also 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 portable PCs of this age and spec.
Across similar types of laptop the worst supported memory clock speeds supported by processor is 133MHz.