discrete graphics on a laptop will greatly extend the effective life of your laptop... It makes a huge difference! The offload of graphics from the cpu on a mobile processor is far more noticable than a desktop. It should have 512mb or 1gb. And intergrated means its "onboard" and Discrete means it is a dedicated "video card" although they are both physically on the motherboard intergrated is on the south bridge chip and discrete is its own chip.