Well, I hate to do this to you, and I appologize fully, but you're going to want to redo that. For some reason I was assuming you had an Intel build. Since you have a Ryzen build, you're going to want to change that again. My bad, and again I appologize. I guess I should have paid more attention to the title that mentioned X570, but I didn't.
So, for Ryzen, you want to set the Windows balanced plan, unless they've changed something along the way in that recommendation since a week ago. Which wouldn't surprise me because they've changed the recommendation from Windows balanced, to Ryzen balanced, back to Windows balanced, several times now along the way since the release of the 2nd gen Ryzen platform, and again after the Zen2 releases. Hard to keep up. Anyhow, yes, you want that on the balanced plan. At least that is the AMD recommendation.
If it was Intel, then what I outlined, so long as it wasn't a laptop or other device with battery life concerns, would be what you want to do. And, if it works like this, I guess it's ok. What you really want to do though is download Ryzen master, and take a look at the readings on there. I suspect that with the performance plan enabled you'll likely be seeing the EDC in the red.
For all monitoring on Ryzen, Ryzen master is really what you want to use. HWinfo is great, and should be used for all other monitoring of the system if you need it, but for CPU related sensors Ryzen master is probably the better option even though both HWinfo and Core Temp have been made compliant now with this platform. They just don't offer the same platform specific capabilities that Ryzen master does.
It is likely, not a certainly, but certainly possible, that your stuttering COULD have some relationship with EDC and VRM throttling if those are especially CPU intensive titles. Go ahead and change those settings back, get Ryzen master installed and see what things are looking like and we can go from there.
I also suspect that if your memory is currently NOT set to the XMP profile speed and timings, and is running at 2133mhz, that is also a contributing factor. As well, make sure that it is installed in the A2 and B2 slots, which are the 2nd and 4th slots over from the CPU socket. Those are the designated slots for two module population on all current dual channel motherboards and has been that way for at least ten years that I know of.