when i play GTA5 it only shows 1024MB of graphic memory and in GPU-Z it says crossfire disabled and i donot see any crossfire enable option in my radeon settings, and my R5 total memory is 8gb but the video memory is only 1gb while 7gb is system memory, i dont know how to add up the 2gb of R7M260 with the 1gb that shows up in the game. and i dont know how to enable crossfire technology