I've recently added a second radeon hd7790 to my pc and set them up for crossfire. When I start up a game the mouse cursor changes to the game cursor and starts to flicker so fast it appears semi-transparent. If I disable crossfire for a particular game the problem goes away but I would obviously prefer to use crossfire having bought the second graphics card.
Apart from that there are no graphical glitches/performance issues.
I'm running Windows 10 Pro 64bit. Example games are Starcraft 2, Civilisation 5, Total War Rome 2, Football Manager 2015. (But it seems to be the case for all the games I have.)
I have tried going back through all the driver/ccc versions I can find but the problem seems to have existed in all the older versions as well, and the only similar issue I can see in the forums never got an answer.
Any help much appreciated.