Hey, I just completed a build recently, and decided to buy a few games from my Steam wishlist to test it out. I've not been able to maintain 60FPS in either Subnautica, or The Long Dark. I've noticed my GPU isn't being fully utilised, usually hovering below ~50%.
System specs:
Here are some MSI readings for reference:
The Long Dark (Ultra Preset 1920x1080) MSI Reading Screenshot
MSI readings in text format:
Subnautica (Highest Preset 1920x1080) MSI Reading Screenshot
Here are some more reference screenshots.
Subnautica:
The Long Dark: