NVENC && NVCUVENC

I understand that the Kepler-class of GPUs supports up to 8 HD encodes via NVENC. Does anyone know if 8 is a hard limit? Or if I encode SD video, is the GPU capable of doing, say, 16 transcodes?

Also, is there a chart or tool which might help me determine the number of simultaneous NVCUVENC (CUDA-based) HD and SD H.264 encodes possible on a Kepler Quadro K4000?

Thanks!
Ty

tb93 Did you ever figure out an answer to this? We are running into the same problem and google has been little help in this.