I guess it's just like the regular 560 Ti.
Download MSI
Afterburner/MSI Kombuster (Kombuster comes with afterburner)
Install them both, go in to the settings on Afterburner and select enable voltage monitoring/changing etc.
Then slowly start to increase your core clock by 5-10MHz at a time while running MSI Kombuster.
Once it starts getting unstable bump up the voltage by 25 - 50mv at a time.
This is how I achieved my overclock.
I should imagine you would be able to achieve up to/around 850/900MHz. They're very good overclockers, much like it's little brother.
EDIT:
The Direct CU cooler should be more than capable, just make sure to watch the temps, I'm comfortable with mine hitting 85*c - 90*c, even though it
never gets near that. the absolute max on mine is 104*c, though yours might be 94*c.
Good luck!
Edited by Buzzin92 - 4/26/12 at 10:12am
