The ThinkPad L440 supports a 1,600MHz processor memory clock speed which is faster than most notebook PCs that have been around for more than two years. Most laptops that have been available for a similar time to it support a 133MHz processor memory clock speed. This 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 across all medium processor core notebook PCs that are a similar age to the ThinkPad L440.
Across similar types of portable PC the worst supported memory clock speeds supported by processor is 133MHz.