The Acer Aspire R7-571 supports a 1,600MHz processor memory clock speed which is faster than most notebook PCs of this spec and age. Most laptops that are a similar age to it support a 133MHz processor memory clock speed. This portable PC also supports 1 and 333MHz processor memory clock speeds.
This portable PC's memory clock speeds supported by processor (1,600MHz) is in fact the best supported memory clock speeds supported by processor across all portable PCs that were released more than two years ago.
A 133MHz processor memory clock speed is the worst supported memory clock speeds supported by processor amongst similar types of portable PC.