The HP Pro supports a 1,600MHz processor memory clock speed which is faster than most laptops of a comparable age and spec to it. Most ultrabooks that have been around for around the same time as 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 portable PCs of this age and type.
Amongst similar types of portable PC the worst supported memory clock speeds supported by processor is 133MHz.