If this is happening only on Avalanche Studios games and all other games are working, I would suggest you contact Avalanche Studios and see if they have recent new patches for both games.
Otherwise, try installing a older previous driver and see if the problems still occurs if this is happening in all games or in general.
You probably going to need to configure AMD Wattman to help it be more stable during game play or heavy stresses. kingfish or pokester can assist you on this part.
Note: By the way, this is an English Only forum so please reply back in translated English.