The HP ZBook 15 supports a faster memory clock speeds supported by processor than most many processor core portable PCs that have been around for more than two years. This HP portable PC supports a 1,600MHz processor memory clock speed, whereas most notebook PCs of this spec and age support a 133MHz processor memory clock speed. In addition, this portable 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 laptops that have been available for a similar time to the ZBook 15.
Across comparable types of portable PC the worst supported memory clock speeds supported by processor is 133MHz.