ARM's newest Mali-G78 GPU has been tested alongside the Kirin 9000 on a Huawei Mate 40, and the results look alarming. Although the GPU manages to hit 1 TFLOPS under peak load, the accompanying power consumption can go as high as 14W. Its average power usage seems to be around 9W.
https://www.notebookcheck.net/Leak-suggests-that-the-Kirin-9000-s-ARM-Mali-G78-GPU-is-a-massive-power-hog.499158.0.html