I recently upgraded the graphics card in my Mac Pro 3,1 to a EVGA Nvidia GTX 680 Mac Edition and have set it up so that After Effects CS6 recognises it as a compatible card as I have read in many places that it should work fine. However, I dont appear to be receiving any benefits to using it, with render times just as long, if not longer than before and previews just as sluggish. I have updated the graphics card and CUDA, set the Ray-tracing preview to GPU and all comps are set to render with ray-tracing, but I still don't get any performance boost.
I have noticed that under the GPU information, in the OpenGL information, the Shader Model is blank and greyed out. I'm not sure if this is related to the problem, but I'm unsure why this is. All of the information under CUDA seems to be correct. I have provided the information below:
|Texture Memory:||1209.00 MB|
|Device:||NVIDIA GeForce GTX 680 OpenGL Engine|
|Version:||2.1 NVIDIA-8.17.74 313.01.03f02|
|Total Memory:||2.00 GB|
|Devices:||1 (GeForce GTX 680)|
|Current Usable Memory:||1.50 GB (at application launch)|
|Maximum Usable Memory:||2.00 GB|
If there is any solution to how to get the benefits of CUDA in after effects, please let me know.
Unless you actually use 3D content like extruded text or shape layers it won't matter and even have the adverse effect of making things slower. It's not a magic potion to bring AE up to lightspeed. It's still just crooked old AE.
As Mylenium says, you seem to be expecting something that isn't the case. The ray-traced 3D renderer does not speed up the rendering of conventional After Effects compositions. Rather, it is a renderer for doing a very narrow set of manipulations in 3D (extrusion of text and shapes and bending of 2D layers). Even these things aren't fast with the ray-traced 3D renderer; they're just faster with the GPU than they would be on the CPU.
Read this page carefully for details of the GPU is used in After Effects: