AE CS6 not recognising graphics card with CUDA

Question

Having invested in Production Premium CS6 this year, I wanted to make the best of it, and upgraded both motherboard and graphics card to take advantage of the promised CUDA processing. Having done so, AE (Edit > Preferences > Preview) has consistently refused to recognise the card, and I am looking for advice on what I can try next.
For information, my PC system involves Windows 7 Home Premium 64-bit, an Asus P8Z68-V/PRO/GEN3 MoBo, 16GB RAM, and the new graphics card, a NVIDIA GeForce GTX 660 Ti (2GB DDR5). I have installed the latest Nvidia driver, 310.70, and the CUDA Toolkit v 5.0. It is possible to run the samples supplied with the CUDA Toolkit, and an application called CUDA-Z functions, both of which seem to suggest to a non-programmer like myself that the 1,344 CUDA processors on the card are working just fine.
It was suggested on another forum that I edit the file raytracer_supported_cards.txt which is in C:\Program Files\Adobe\Adobe After Effects CS6\Support Files to include the GTX 660. Other people have found this to work - i.e. that after doing so and resaving the file, AE recognises their card and its CUDA capability. I haven't.
I've run out of ideas. Does anyone please have either an explanation for the AE response, or a fix?
Peter
Norfolk, UK

Answer 1

I've had the same problem-- Premiere Pro and After Effects not recognizing my new GPU.
The problem is in the file PP looks for is cuda_supported_cards.txt
And AE looks in raytracer_supported_cards.txt
If your GPU isn't listed, then the programs assume you don't have the right CUDA enabled card. The problem is that Adobe has a hard time keeping current with the CUDA cards as they are produced. For example, I had a geForce GTX 670 card, which was not listed in those files, but the geForce 570 card was. Clearly, the 670 was just an improvement over the 570, but Adobe hadn't had a chance to update those txt files.
It has nothing to do with Java or anything else. It's just the txt file that contains the names of the GPUs.
Also, for AE, it isn't just 3D modeling or ray trace that gets affected. It's also speeds up hardware accelerated panels and the Cartoon Effect. Plus, I've got 4 GB on the Nvidia card and the CUDA cores going to waste if I don't maximize my use of the GPU I paid extra money for.
In my case, I'm using a souped up laptop with a geForce gtx 675mx chip. And I saw a noticeable increase in render speed once I modified the two txt files.
Yes, it would be nice if Adobe were faster in updating the cards in their txt files, but in the meantime, if you have a card that is clearly an update of an older card (like going from the 570 to the 670), then I think it is a pretty safe bet.
The only other thing to remember is that if you update PP or AE, via the Creative Cloud, or otherwise, your carefully prepared txt files are likely going to get overwritten, and you'll have to re-edit them to include your card.
Hope that helps.