Choppy graphics with Dragon Age 2

I think the game is having issues with nvidia cards in DX11. From the thread over at Bioware:

We’re currently working with AMD and nVidia on the following issues:

#1 Severe slowdowns on very high details on nVidia (game running at less than 10 FPS). *Note: Some users are still reporting “low framerates” in the 30’s, assuming it should run better on their PC. The very high detail is very demanding from the hardware, especially when running at a very high resolution. Any of the following can be tried to improve performance:

Use a lower antialiasing setting or turn antialiasing off completely

Disable v-sync

Use lower anisotropic filtering levels

Disable the diffusion depth of field effect

Disable the screen space ambient occlusion effect

Reduce screen resolution

Reduce graphics detail.