NVIDIA's next-gen GPUs sure took their sweet time arriving, but the first of the Kepler crew is finally available in stores and its 28nm silicon is just itching to show off what it can do. You may be wondering what the 2GB GeForce GTX 680 brings to the gaming table, and whether it'll put an end to AMD's free run at the top of the food chain. Well, NVIDIA now claims it has "the fastest GPU in the world", with both lower power consumption and a 10-40 percent performance advantage over AMD's single-GPU rival, the
