The amount of RAM in your computer can vary depending on how you plan to use it. Some people can scrape by with just a little, others need way more.

What is RAM, how does it affect performance, and how can you confidently choose your RAM when you shop for a computer? Read this to find out.

DDR, DIMM, XMP, CAS ... Confused? No problem -- our RAM buying guide will help you demystify this once and for all so that you can make your PC run great.