Hey
Today I got my new 5850 and did the switch from nvidia to ati and it hasn't been problem free yet.
I can only seem to get 60hz in games and other fullscreen apps, even if I use the refreshlock in CCC or other programs like RefreshLock. I tried changing the DALNonStandardModes in the registry but it didn't help.
The monitor i'm using is a 2233RZ 1680x1050 and it works perfectly fine with 120hz as long as I am on the desktop.

