There are a number of ways to identify your computer’s graphics hardware, including built-in and third-party system information utilities. Of course, if you never play PC games on your computer and don’t care about 3D graphics performance, you don’t really need to update your graphics drivers at all.
While newer games get the bulk of the attention, even some older games see a significant increase in performance with updated drivers. These sorts of performance increases in updated graphics drivers are not uncommon. There are also numerous bug fixes and new features included. And that just covers the specific games for which optimization has been improved.