Maximum Efficiency Mode in Volta

Dear Developers,

I would like to know why NVIDIA introduced “Maximum Efficiency Mode” as a new feature of Volta GPUs? However, we still can apply and use this technology in the previous generations of NVIDIA GPUs using “nvidia-smi -pl xxx” command? I should be noted that “Maximum Efficiency Mode” is also called “power cap” in other sources.

This is a very important question for me since I would like to investigate that in my thesis.

Best regards,
Ehsan Sharifi Esfahani