Why do I need a graphic card?

The HD 4570 is better than the 4500 but you have a laptop & cant buy a video card for it. Laptops for the most part are not upgradeable. You cant upgrade the CPU or video card & most likely RAM. The way you bought it is the way its going to stay. For gaming desktops are the way to go or buy a gaming laptop. They are more expensive than a regular laptop this Dell Alienware M17x Gaming Laptop Computer will set you back $2,000. Dells XPS M1730 is good also.