This is the heart of a gaming razer blade 15 laptop computer. The GPU (graphics processing unit) is a component that will make or break your gaming experience. If your GPU isn't up to snuff, your games won't play.
Without getting into specific models since they change all the time, the key is that the graphics card not share resources with the computer. A gaming laptop video card must have its own memory on board. Generally speaking, standard off-the-shelf laptops will not have this feature. The two current makers of laptop video cards are nVIDIA and ATI.