This guide is to help understand the nuances of Direct3D and it's versioning/compatibility schema. Confusingly, it's not all about a single number, but a few things that can make buying video cards annoying.   Direct3D? Isn't it DirectX? This is being pedantic, because I know some people like to be pedantic. Direct3D is the actual 3D acceleration API that most people are referring to when talking about the DirectX API in general. DirectX is really a family of API for game developm