(I have 1 GTX 560 Ti)
I applied the new beta driver from nvidia (320.14) and applied the full/SLI version of the patch. With this I managed to go from 96Hz up to 110Hz with LCD Reduced. 120Hz works but I get those scan lines.
Could people post their custom timings for 120Hz? I don't wanna give up on running full 120Hz just yet.
EDIT: After further testing my monitor seems to work as it should at 119Hz with LCD reduced. So I really can't imagine there needs to be done a lot of tweaking to hit the magic 120Hz.
This is the X-Star DP2710 for anyone curious.