The DELL XPS 12 supports a faster memory clock speeds supported by processor than most portable PCs of a similar age and spec to it. This portable PC supports a 1,600MHz processor memory clock speed, whereas most comparable spec portable PCs that were released more than two years ago support a 133MHz processor memory clock speed. In addition, this DELL portable PC supports 1 and 333MHz processor memory clock speeds.
This notebook PC's memory clock speeds supported by processor (1,600MHz) is in fact the best supported memory clock speeds supported by processor amongst all laptops that have been available for around the same time as the XPS 12.
A 133MHz processor memory clock speed is the worst supported memory clock speeds supported by processor across similar types of notebook PC.