HappySqurriel on 07 October 2010
3D is a much more significant strain on the GPU than on the CPU ... In very simple terms, most of what is done on the CPU is to determine the positioning of objects within 3 dimensional "game" space, and then these objects are transformed into a 2D image by the GPU. To produce a 3D image the objects are still only positioned in 3 dimensional games space once, and then rendered into two separate 2D images.
