GTX580:X1748
GTX 460:X923
GTS 450:604
HD5750:602
HD5770:722
HD5830:X845
HD5870:X1234
HD5870CF:X2350
HD6850:X899
HD6870:X1120
HD6970:X1807


Assuming all this is real then 6970 is faster then ->
HD5870= 46%
HD6870= 61%
GTX580= 3%