Choosing a healthy amount of random-access memory (RAM) allows the desktop PC to load on-the-fly data when you're playing games, things like textures for the world and characters, sound effects, and more. Everyday use will see improvement if you can afford extra RAM, too. Modern web browsers can quickly eat up available memory when opening multiple tabs, but, you won't find any desktops with less than 8GB of RAM, sufficient for most cases.