Hello David, :)
This is because of the new Power Mode Level feature.
Change Power Mode Level in Windows 10 Performance Maintenance Tutorials
If you like, you could create a custom Power Plan to use for high performance as a workaround.
Thank you so much for this. Had this issue for quite a while now and that second link seemed to have been the only thing I haven't tried.
Welcome to Ten Forums MrTurkishBagel. I'm glad it was able to help.
In addition, you might also see if an option in the tutorial below may be able to restore any missing default power plans.
I would like to put my 2 cents in here. I think there may be a difference when you use the high performance powercfg plan versus using the slider to goto high performance. I noticed why watching both under HWINFO64 that when you use the actual high performance plan, the cpu's seem to go to their max turbo speed and stay there. When you use the slider for high performance, the cpu speed will fluctuate from low to high depending on the load on the cpu. When you have Balanced on the slider, the cpu speed will actually drop below the base cpu speed, and again the speed will auto adjust itself depending on the cpu load.
Also when you use the High Performance mode, since it seems to be invoking your max turbo speed it will result in your cpu temps going up from 5 to 10 C. HTH
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