Originally Posted by Serial_Killer
does the 5600 use 3.3ns ram, like 5700?
Not sure why you would want to know if your card uses same memory 3.3ns types as 5700, since you can't flash with a 5700 bios ?
Also, as I believe your cards stock speeds are 325/500, then only thing this indicates is that the memory chip rating should be no greater than 4.0ns.
However, easy way to make a better guess at memory rating is by either, looking at what is actually printed on the memory chips, or, by seeing how high you can overclock memory speed.