The Lenovo W540 supports a 1,600MHz processor memory clock speed which is faster than most notebook PCs of a similar type and age to it. Most notebook PCs that have been available for around the same time as it support a 133MHz processor memory clock speed. This Lenovo notebook 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 amongst all many processor core portable PCs that are a similar age to the W540.
Amongst comparable types of portable PC the worst supported memory clock speeds supported by processor is 133MHz.