I have just installed 15.7 after uninstalling the last one and running DDU. I'm running the latest slow ring build of Windows 10 and have a 280x and 2560x1440 screen connected with DP.
As the topic says I've enabled VSR in CCC, the screen went black for a few seconds and came back. But I can't change to the new VSR anywhere, tried CCC, Windows desktop settings and a couple of games: CoH2, Arma3.
By the way, Dota2 is unusable with 15.7, the game almost freezes when in focus but runs smoothly when something else is in focus. This happens during the loading screen so I can't even use the menus in the game.