I've installed the NVIDIA GeForce GTX 680 2048 MB on a Mac Pro 3,2 GHz Quad-Core Intel Xeon running OSX 10.9.4 but it seems AE doesn't take advantage of the new hardware and the CUDA technology. The ATI Radeon HD 5770 1024 MB mounted before, went for the same rendering times. Am I missing any setting in the software or isn't the graphic card the perfect choice for fastening my rendering processes?
Ae obviously recognize the Nvidia and the CUDA settings should be ok....
As I understand it, the graphic card is used very little in AFX, unlike in Premiere. A fast CPU and lots of memory is the best way to increase performance.
AE only takes advantage of CUDA for ray traced features, which is being phased out. To get the most out of your render times, invest in processing power and RAM. I upgraded to the Titan Black and noticed hardly any difference in my render times. Check out this response given by AE's Todd Kopriva on Sept 24, 2014 at Creative Cow: CUDA does not accelerate : Adobe After Effects