Results: Bioshock Infinite
Bioshock Infinite adds all kinds of fancy tricks to the PC to make visuals that are, hyperbole aside, simply stunning. Or at least new. It is based on UE 3.0, but still has plenty of bells and whistles to make things look really nice with many interesting effects. Ultra/DX11/DOF is enabled while using the built-in benchmark.
Bioshock reverses the trend that was started with Battlefield 3. The 280X now is slower than the GTX 770, and quite a bit slower than the GTX 780. The GTX 780 again comes very close to the 270X in CrossFire.