There are a few things you need to know before starting to build a gaming PC. First, you need a computer that can play video games. This can be a desktop or laptop, but it is important to choose one that is powerful enough to handle the games you want to play. Next, you need a graphics card. This is a piece of hardware that helps your computer process the graphics that are displayed on your screen. Finally, you need a computer case. This is a piece of hardware that helps protect your computer and your components. Now that you have all of these things, you can start building your own gaming PC.