[fedz]

To put it bluntly, the CCC uses a nicer user interface and allows more complex options, as said above. However, its overclocking feature is an absolute joke and, as well as being a massive resource hog, it crashes more often than I´d ever care to know about. As a result, I´ve ditched it, and so have many other people.
My system isn´t exactly a slouch, you´d expect it to work best with that graphics card, but no. As a result, I think the expression `don´t touch it with a barge pole´comes to mind.
However, it seems to work for some, so I´d just advise you to try it and see what works best.
Best of luck with that

fedz