Re: what does Refresh do?
Some technical talks:-
there are two types of RAM,static RAM and Dynamic RAM,and the ones we use...like SD RAM or synchronous dynamic RAM or DDR RAM, are all but dynamic RAMs.
static RAM stores bit of information as voltage,and dynamic ram stores bit of information as charge..
so charge leaks with time and thus we have the first form of refresh,,which stops the RAM from malfunctioning by sending the information again,,thus you have the basic idea of what refresh means,,is it alright???