The Apple MacBook Air Early 2015 supports a faster memory clock speeds supported by processor than most MacBooks that have been available for more than a year. This portable PC supports a 1,600MHz processor memory clock speed, whereas most comparable spec portable PCs that have been around 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 amongst all laptops of a comparable age and spec to the MacBook Air Early 2015.
Amongst comparable types of laptop the worst supported memory clock speeds supported by processor is 133MHz.