If my AMD 6700 can run it on max with a medium end processor (AMD athlon x4), then why can't this?
because it isn't possible, you need a gtx 580 or a 7950 to max it, my 6850 cannot max skyrim except with the textures lower, and once the explosions start going it will be a lagg fest, plus there is no way your playing it at 1920x1080 with that card, it cannot be done
see how low the 6870 is? yours is below that, and this was with an i5 2500k, overclocked to 4ghz. there is no way in heck your Athlon can do the same