Hello everyone. I have AMD HD 7620G and 8670M graphics cards with AMD A10-4655M processor. The problem I'm facing is when I'm trying to play games I see nothing but a black screen. But I can hear the game is running smoothly behind. I updated drivers and have no heat problem: blowed the dust and changed thermal paste. I even tried underclocking GPU with MSI Afterburner. However, if I disable one of the graphics cards any game runs normally, but under poor performance. How can I solve this problem?