The Zenbook UX51 supports a 1,600MHz processor memory clock speed which is faster than most laptops of a comparable age and type to it. Most ultrabooks that have been available for a comparable time to it support a 133MHz processor memory clock speed. This notebook PC also supports 1 and 333MHz processor memory clock speeds.
This portable PC's memory clock speeds supported by processor (1,600MHz) is actually the best supported memory clock speeds supported by processor amongst all laptops that have been available for around the same time as the Zenbook UX51.
The worst supported memory clock speeds supported by processor across comparable types of portable PC is 133MHz.