The HP ProBook 650 G1 supports a 1,600MHz processor memory clock speed which is faster than most portable PCs of this age and spec. Most portable PCs that were launched around the same time as it support a 133MHz processor memory clock speed. In addition, this portable PC supports 1 and 333MHz processor memory clock speeds.
This notebook PC's memory clock speeds supported by processor (1,600MHz) is actually the best supported memory clock speeds supported by processor amongst all medium processor core notebook PCs that were released around the same time as the ProBook 650 G1.
Amongst similar types of notebook PC the worst supported memory clock speeds supported by processor is 133MHz.