I can see why you are confused. This is a very long story problem. Some of the information is not even needed. So you must determine WHAT is being asked and get the key points of the problem.
A customer is insisting that you upgrade his laptop video card's RAM from DDR to Graphic-DDR. After a few attempts to explain to him that video RAM is not upgradeable, he pulls an ancient PCI video card out of his pocket showing you places where RAM can be added, goes through a long speech about the how he used to add RAM to his desktop's video card "back in the day," then accuses you of lying to him.