The fact that a given memory technology is ten times faster than another is certainly not limited by the user's typing speed. It will just store each keypress ten times faster. Of course, the user will not notice any difference whatsoever.
Where the user will see a difference is when the user transfers a large block of data (or a large quantity of small blocks) to that memory. That is where the speed will be significant and where the notion of limiting factors will come into account, such as CPU power, number of threads allotted to the task and available bandwidth between the memory modules and the source/destination of the data.
If you're just waiting on user keyboard operations, a good ol' PC XT could do the job nicely.
Biting the hand that feeds IT
