Here is an interesting article on the latest W10 scheduler problem. MS is working on a fix. It provides a link to coreprio.exe (free utility) which is a temporary (and probably flawed) workaround. I have tried it with significant improvement in Indigo Supercar Bench of about 65% (4.325 -> 7.254). There was no improvement for the Bedroom Bench). It did not help Cinebench. All these test saturated PPT and TDC and I had to raise them to get these numbers. Here is a screenshot of Ryzen Master:
Using this RM 'CB Profile', CB score went from 5040 to 5724.
I found in ryzen-master-quick-reference-guide.pdf this explanation for the '--%' always showing for EDC for the 2990WX:
Any questions/comments? Enjoy, John.