Dirt 3 is a rallying videogame and the third in the Dirt series of the Colin McRae Rally series, developed and published by Codemasters, although the “Colin McRae” tag has been completely removed from this iteration (having been previously been removed from American versions of previous games in the series).
A close match at these settings, although the GTX580 manages to just outperform the VTX3D HD6870 X2 by 5-6 fps.