Most console titles run at about 30 FPS at around 720p resolution. Their GPUs can't handle anything better than that. There are some exceptions like CoD:MW3, which uses an old engine that has been optimized quite heavily, and some of the early console titles could do 60 FPS, but that is not true with most current games.
If you want to imitate console graphics, best thing you can do would be to run your games at 1280x720 on the low or medium settings. It would help to know more about your system though. Starcraft II is more likely to be CPU bound than GPU bound, especially on a lower resolution. Rage isn't demanding at all, even really low end cards do well at lower resolutions, bugs and texture pop in notwithstanding. BF3 you would probably have to play at low settings, it needs a strong GPU and a quad core to run well.