In 2014, AMD set forth an aim to improve the power efficiency of its processors by 25 in 6 years. Now, in 2020, the company asserts that it has not only met that goal but exceeded it. This has been done in the form of the Ryzen 7 4800H APU.
https://www.notebookcheck.net/AMD-announces-that-the-Ryzen-7-4800H-destroys-its-25x20-power-efficiency-goal.477494.0.html