That card is not supported for the GPU acceleration of the ray-traced 3D renderer, and it never will be.
Nvidia has changed the CUDA capabilities of the new Maxwell cards such that they are incompatible with the version of Optix (the library that drives the ray-traced 3D renderer) that comes with After Effects.
For many reasons, we have ceased development on the ray-traced 3D renderer, so we will not be releasing updates that enable these new cards to work with this feature.
If you are working with 3D in After Effects, you have many choices that are superior to using the ray-traced 3D renderer, including Cinema 4D, which is included with After Effects.