I have a similar experience but with a Ryzen 3800X, 32 GB (4x8GB) DDR4-3200 CL16 memory, and an ASUS Strix 1070 8GB. I can only play on 1080p low at 30-40 fps on the more demanding areas plus the nvidia driver likes to crash sporadically.
From fellow gamers it seems like AMD is more stable...