a simple Google search brings up the official list:
Any other cards may or may not work for GPU accelerated effects in AE using the Ray-traced rendering system, but this rendering engine is obsolete and will not be undergoing any further development.
A better list to look at are the Mercury playback supported cards for Premiere Pro.
I would make my choice from this list.
That you for your prompt response.
AE uses the GPU for very little. See here: GPU (CUDA, OpenGL) features in After Effects
Unless you plan to use the obsolete ray-traced renderer (and you really don't want to use that if you're using CC), what GPU you get won't matter for stock After Effects.
Video Copilot's Element 3D, Red Giant's Universe, and some other third-party plugins do make use of the GPU, but their lists of acceptable cards are much larger.