The Inspiron 15 supports a 1,600MHz processor memory clock speed which is faster than most notebook PCs that are a similar age to it. Most comparable spec laptops that have been on the market for a similar time to 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 actually the best supported memory clock speeds supported by processor amongst all notebook PCs that have been available for around the same time as the Inspiron 15.
A 133MHz processor memory clock speed is the worst supported memory clock speeds supported by processor across comparable types of notebook PC.