They are really having Serious issues for supporting most famous games on this planet like Dota 2 , battlefield 4 , overwatch , league of legends , CS:GO
They already made many fail drivers , i wish to see the day i can play all of them normaly with one driver like Nvidia fanboys
The HD6xxx series has reached peak optimisation and been moved to legacy status, there will not be any further driver updates for your product. More information available here.
The last Catalyst driver for your system is 15.11.1 Beta and is available here.
I would recommend using DDU to sweep your system of AMD drivers, and then trying the driver above to see if it resolves your issue.
It sounds kinda sad. I'll try to fix my problem. I hope, everything will work. Thanks for help!