We improved ramp down time in some cases with __GL_ExperimentalPerfStrategy=1 which solution already added in the driver. RELEASE HIGHLIGHTS basically pointing to __GL_ExperimentalPerfStrategy solution.
We have been testing different GPUs like Pascal, Volta, and Turning for clock ramp-down time. We observed different ramp-down time depending on different GPU architecture and the applications used/running. So it would be nice if we get testing results for Turning GPUs from your side to confirm some things.