Today I tested the new microdisplacement of Blender and that's the first result.
Nothing is more annoying than a CUDA Error in the final render because my graphic card doesn't like the particle systems.
It seems as if I have to render it with the CPU. Unfortunately, the rendering time will be more than double. So the viewport picture, in which most particle/hair systems are disabled, will be for a long time the only picture of her.