The Inspiron 17 5748 supports a 1,600MHz processor memory clock speed which is faster than most laptops that have been available for more than two years. Most medium processor core notebook PCs that have been around for around the same time as it support a 133MHz processor memory clock speed. In addition, this DELL portable PC supports 1 and 333MHz processor memory clock speeds.
A 1,600MHz processor memory clock speed is in fact the best supported memory clock speeds supported by processor across all laptops of a similar age and spec to the Inspiron 17 5748.
The worst supported memory clock speeds supported by processor across similar types of laptop is 133MHz.