hi guys I need your help... I've got a laptop asus x555bp with processor amd a9 7th gen and graphic radeon r5 m420 2gb my question is that I don't know how to use interchangeable graphics it's always showing the integrated card with 1gb and I cannot play some games because that I've opened radeon settings and it shows me both but I don't know how to make heavy games make use of the big card also I don't know why since one update 'amd r5 m420' changed for 'hd8500m' what have I got to do? need your help please and thanks in advance...cheers!!