The eMachines 633 is not really a bad little box. You definitely can't do anything as drastic as OC'ing it. About all you can do with it is add RAM, a better HD, and a better Vid card. Really, when you think of this box, you should try to think of it as more of an appliance than a computer. It does fine if you use it for everyday stuff, just don't expect too much of it. I have one setup as my PVR (personal video recorder) with an ATI All In Wonder Radeon, and it does this job admirably. I even used to do some light video editing on it, before I built my AMD rig...