NVDEC Performance

What is the maximum FPS from a NVIDIA GPU for a 720p video?
NVIDIA has published figures for 1080p only.

From GTC 2016, “http://on-demand.gputechconf.com/gtc/2016/presentation/s6226-abhijit-patait-high-performance-video.pdf”, can someone explain the TESLA PERFORMANCE numbers for transcoding. What id (14+14) for Tesla M6.
If one NVENC is 7, then 2 should be 7+7. Right??

Thanks in advance.