Bought a used alienwareHow to switch to dedicated graphics

I just bought a used aliens are mx17 r3 and I'm having some problems. I can't figure out what kind of dedicated graphics the laptop is and I can't figure out how to switch it from the integrated graphics. I'm running games like Minecraft really slow where I should be running them amazingly. I also don't have the option in YouTube to watch 60fps videos and my computer is just all around slow.