I hope this isn't too far off topic but does anyone know how the HD 7950 mac edition compares to the GTX 680 Mac edition for 3D work?
I have scoured the internet and I can't find a comparison between the two for 3D work, only games :/
I think this is the short answer:
Radeon 7950 is better for X-plane 10 due to the 3 GB VRAM against the "only" 2 GB of the GeForce 680.
Radeon 7950 is better in OpenCL.
For the rest GeForce 680 is better (especially CUDA)