Graphic Card

Hello, i know there is a title about this but i couldn't find what i need. Couldn't find any solution for my problem. I have a AMD Radeon R9 M200X graphic card, and also i have a Intel 4200 HD (i am useing a toshiba laptop). As you know minecarft is useing the Intel one instead of the AMD. So;

• How can i make Minecarft to use the AMD one?
  -The graphic cards has any effect on Minecraft or ram is the only thing that must be.
  -I know it isn't offical for you guys but i want to play with the shaders mod. Normally i got a 125 Fps. But when i switch to the shaders mod i got a 9 Fps.
  -I am useing a 64bit java and i have 16 Gb ram.

Thanks.