The TravelMate TMP643-M supports a faster memory clock speeds supported by processor than most comparable spec laptops that have been around for around the same time as it. This portable PC supports a 1,600MHz processor memory clock speed, whereas most medium processor core notebook PCs that came out around the same time as it support a 133MHz processor memory clock speed. This Acer laptop 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 similar spec portable PCs that have been available for a comparable time to the TravelMate TMP643-M.
Amongst similar types of portable PC the worst supported memory clock speeds supported by processor is 133MHz.