The Lenovo S400 supports a 1,600MHz processor memory clock speed which is faster than most laptops of this spec and age. Most comparable spec laptops that were released around the same time as it support a 133MHz processor memory clock speed. In addition, this portable PC supports 1 and 333MHz processor memory clock speeds.
This notebook PC's memory clock speeds supported by processor (1,600MHz) is actually the best supported memory clock speeds supported by processor amongst all notebook PCs that have been available for more than two years.
Amongst similar types of notebook PC the worst supported memory clock speeds supported by processor is 133MHz.