in my experience use max peformance in global only run in full clocks when idle WHEN there rogue process NOT set to adaptive. which usual the searchui/Startmenuexperiencehost as for are windows process go, so long as those process are set to adaptive idle clock work just fine when using max performance in globe. it worked like since the first day win 7 started using gpu to run programs along with win 10, less something changed since 466.11. Has something change recently to make max performance in global no longer let the gpu go to idle clocks? but Pretty sure it just rogue process that need to be set to adaptive, which why i have inspector profiles save and restored ever time i update drivers. IF i dont restore them then max performance in global results in 3d clocks always used. People been saying use Max performance in global result 3d clock even when idle for decades now. Which false it only true if one dont find those rogue processes that hitting the gpu and setting profile for them.