I haven't OC'd a video card in a few years, but in my experience it's not worth the effort and risk of burning something out, because you don't get very much 'more' out of them. I'm all for experimenting and learning however, I know that AMD has one for their cards called 'AMD OverDrive', another newer one is called Trixx. There's a multitude of them out there, and they all do pretty much the same thing. I'd welcome others' opinions on this, as I am outdated in the field.