had gtx 580 before this. the difference is very small in the games I tested. tex metro cargo light so I can run in 3d and 2x MSAA with the same performance as the 580 had no MSAA.
skyrim in 3d fps goes up and down between 14fps and 34 fps outdoors.
and sometimes dawdling card up himself and you have to restart your computer to get up the performance again.
feel badly fooled