Is having a high IQ a prerequisite for having a good memory? The debate continues if there is a connection, or if improving memory is a learned response despite intelligence. Regardless, a transmission needs to occur, as the learning material needs to be absorbed by the brain to comprehend and store.
There are fortunately strategies to help anyone who needs to learn something, to develop a more efficient effective memory system.
These steps are by no means exhaustive, but rather meant as a starting point to begin and improve.