Simply installing new or additional RAM sticks can kick your PC's performance into high gear. Here's how to do it, plus four options to buy.

Installing the RAM Most people can figure out how to install RAM sticks into their computer. If you can’t, there’s a tutorial here.

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.