The Asus S400CA supports a 1,600MHz processor memory clock speed which is faster than most ultrabooks that have been on the market for a comparable time to it. Most notebook PCs that were released more than two years ago support a 133MHz processor memory clock speed. In addition, this notebook PC supports 1 and 333MHz processor memory clock speeds.
A 1,600MHz processor memory clock speed is actually the best supported memory clock speeds supported by processor across all ultrabooks that have been on the market for more than two years.
Across similar types of laptop the worst supported memory clock speeds supported by processor is 133MHz.