Inside Apple's automatic graphics switching

Inside Apple's automatic graphics switching: "Intel's latest stable of mobile processors—Core i3, i5, and i7—all include integrated graphics in the same package as the CPU. Dubbed Intel HD, this integrated graphics processor is designed primarily for efficiency. While its performance is far better than the previous GMA950, for instance, it still wouldn't be classified as good for 'performance' graphics in any sense of the term in common usage."