The Toshiba Qosmio X70-B supports a faster memory clock speeds supported by processor than most portable PCs of a similar spec and age to it. This notebook PC supports a 1,600MHz processor memory clock speed, whereas most many processor core portable PCs that were launched around the same time as it support a 133MHz processor memory clock speed. This Toshiba portable 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 across all similar spec portable PCs that are a comparable age to the Qosmio X70-B.
Across similar types of portable PC the worst supported memory clock speeds supported by processor is 133MHz.