In comparison for the GPU: A Playstation 4 is reported to have 1.84 TFLOPS, while a GTX 570 only has 1.41. Also 1GB on that card will not do you any good since most games next generation will definitely be getting a texture upgrade. 3GB seems optimal. So an upgrade on the GPU is needed. 8 GB RAM should be fine, and that 2600 too I think.
Peak theoretical single precision floating point operations is no way to go about measuring over all hardware performance, TFLOP numbers are just something vendors throw around to make their dicks look bigger.
Sure, but I still think that GPU should be upgraded if he wants to uprade towards next generation With high specifications on the settings.