On my previous post regarding single core boost on the R7 1700 gets clipped on High performance setting. Minimum power state set to 18% works well with a customized Balanced with no issues going to sleep mode. If you want something with a higher performance snap, create a customized Balanced and label it as your performance (label it as you wish) set minimum power state to 72% and single core doesn't get clipped too.
Since High performance settings disables core parking it also does the same on single core boost.
Base on 18% x 4 = 72%. Other numbers seem to cull the single core boost on my Ryzen 7 1700 on Asrock AB250 Pro4 with dual rank G.Skill 32 GB (2X16G) F4=3000C 14D-32GVK DDR4-3000 Ripjaws V set at 2666mhz.
The above is for the R7 1700 processor.