The Lenovo E431 supports a 1,600MHz processor memory clock speed which is faster than most medium processor core notebook PCs that have been on the market for more than two years. Most notebook PCs that were released around the same time as it support a 133MHz processor memory clock speed. In addition, this Lenovo laptop 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 amongst all portable PCs of this age and spec.
Amongst similar types of laptop the worst supported memory clock speeds supported by processor is 133MHz.