I've made sure the OC is stable, running burn in tests on that OC and CPU/GPU and RAM.
And most games are single core still you would be surprised, if a game does not utilize the resource like this one it would not top out CPU/GPU or RAM.
As i am playing i have use monitor software since the first obvious culprit would be a unstable OC that is not the case.
Norton recognizes both demo's as well so writes exception rules are in place, audio wise i use the chip on the motherboard.
The only thing i can come up with as it stands it some Ryzen driver issue since it is a new CPU, BIOS updates for stability are still being worked on.