about computer memory

As most of you know, my husband works on and builds computers for his job. I saw some very cool stuff inside the computers. There's the motherboard, hard drive, CPU and computer memory. My husband said the memory was one of the most important parts of the computer. If the memory is slow or not enough, it can cause a lot of problems and really slow the computer down. Both laptops and desktops have this computer memory, but they are a little different design, because the laptop is a lot smaller. I did some looking and found some on Buy.com. They have some really nice things for computers. Check them out sometime!