Using TensorFlow, which CUDA toolkit and cuDNN versions to use? • /r/MachineLearning

I've been trying to install TensorFlow on my machine (Ubuntu 14.04 w/ GTX 970), but I've been having some issues with installing the GPU-enabled version. I initially installed CUDA 7.5 and cuDNN 7.0 but received an error, I believe it was an ImportError involving libcudart.so.7.5. I also installed via pip, could this potentially be an issue? After some reading, it seems that TF used to not have support for CUDA 7.5 and cuDNN 7.0, however all the stuff I have found is from back in November so no idea if this is still true.