resourcepack

how to switch intel HD4000 graphic card to Amd 7650, my game run on avg 50fps on intel but i cannot run smoothly if i install any resource pack or shader pack any one plz tell me how to switch graphic card from intel to amd. . my laptop specs i5 2.5Ghz 3rd gen 8Gb DDR3 ram intel Hd 4000 & Amd...