My GPU is a GeForce RTX 2700S and my CPU is exactly the minimum spec, an AMD Ryzen 5 3600, and I’m able to play at a stable 30FPS with only occasional stutters when loading a new chunk in a big city. In my 50+ hours played, I haven’t once had performance negatively impact my experience.

Edit: With the latest game update, I now get 60FPS while exploring and 40-50FPS in cities.