I have a lenovo ideapad with AMD A6 with integrated AMD radeon r4 graphic card. Now the problem is when i installed GTA V game in my pc it started lagging then I changed my RAM from 4gb to 8gb. After changing my RAM to 8gb my dedicated video memory increased to 512mb but the video memory in my game console now shows 512mb (While running on 4gb ram, my dedicated video memory is 80mb only, but in my game console it showed 1992mb). So please help me increase the dedicated memory.