The Probook 450 supports a 1,600MHz processor memory clock speed which is faster than most comparable spec notebook PCs that came out around the same time as it. Most medium processor core notebook PCs that have been available for a similar time to it support a 133MHz processor memory clock speed. This portable PC also 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 portable PCs of this spec and age.
The worst supported memory clock speeds supported by processor amongst similar types of notebook PC is 133MHz.