http://support.amd.com/en-us/kb-articles/Pages/latest-catalys...
Highlights of AMD Catalyst™ 15.6 Beta Windows Driver
Performance and Stability improvements for Batman™: Arkham Knight
Important Note:
AMD Crossfire support is currently disabled for Batman™: Arkham Knight while AMD works closely with Warner Bros. Interactive Entertainment to resolve the issue. An update for this issue will be released as soon as it is available
Known Issues:
[422129] Batman™: Arkham Knight – The application may crash during in game benchmarking or while exiting the game
[422130] Batman™: Arkham Knight – The screen may turn black or pink while changing resolution to 1680x1050.