With Tegra 2 hogging the spotlight, sometimes it's easy to forget that NVIDIA is still primarily in the business of making GPUs for computers. Yet, here it is with the GeForce GTX 560, another graphics chip ready to be inserted into mid-range gaming rigs. This smaller sibling of the GTX 560 Ti is designed to plug right into a small price gap in the company's lineup -- right around the $200 mark. The 336 CUDA cores inside this second-gen Fermi card, predictably, perform slightly better than the GTX 460 and fall just