Switch to cuDNN

[supergrover]

I noticed you wanted to switch to cuDNN.

I would like to keep the old CUDA code as well. For example my GPU doesn't allow for cuDNN (it's too old).
We could test if the GPU supports cuDNN (I believe cuDNN is supported from compute capability >= 3 or so).

[poweic]

I didn't realize that cuDNN need Compute Capability >= 3.0
Sure, we should keep the old one.

[mrgloom]

Is there any documentation that tells what compute compability you need to run cuDNN v1,v2,v3?

[poweic]

I have cuDNN v1 user guide. In CUDNN_Library.pdf,
"2.4. Requirements
cuDNN supports NVIDIA GPUs of compute capability 3.0 and higher and requires an NVIDIA Driver compatible with CUDA Toolkit 6.5."

To get this PDF, you have to login to developer.nvidia.com and go to the download page to see this PDF.