The Lenovo L540 supports a 1,600MHz processor memory clock speed which is faster than most medium processor core notebook PCs that came out more than two years ago. Most notebook PCs of a comparable spec and age to it support a 133MHz processor memory clock speed. In addition, this notebook PC supports 1 and 333MHz processor memory clock speeds.
A 1,600MHz processor memory clock speed is actually the best supported memory clock speeds supported by processor across all portable PCs of a similar age and type to the L540.
Across similar types of notebook PC the worst supported memory clock speeds supported by processor is 133MHz.