The Toshiba C55 supports a 1,600MHz processor memory clock speed which is faster than most comparable spec portable PCs that have been around for around the same time as it. Most portable PCs of a similar type and age to it support a 133MHz processor memory clock speed. In addition, this notebook 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 notebook PCs of this age and spec.
The worst supported memory clock speeds supported by processor amongst comparable types of notebook PC is 133MHz.