I'm not exactly new when it comes to Linux, especially Ubuntu. But due to my dislike of unity I decided to go with Xubuntu instead of the regular distro. I remember when first doing a clean install of Linux the system worked sluggish. Usually I'd go to where you can add desktop effects (like how the window will jiggle as you move it) it'd have me install my video driver. In Xubuntu it doesn't have that desktop effects option. And since it's working slow like a clean install of the OS would I'm wondering how I would go about installing the drivers?

All answers are appreciated.