With an AMD graphics card, DR3 suffers. Intel cpus can still power through.
With an nvidia card, AMD cpus basically double in performance.
In my quick testing, the game uses between 2-4 threads. (I have an AMD card, so no idea how nvidia drivers effect that) It seems to hit 2 cpu cores hard all the time, with a third picking up in moderate action, and the 4th thread rarely picking up. Gamegpu shows that it can hit 6 threads with an nvidia card and no more. I wonder if its an FPU or int heavy workload.
The game uses about 3GB-5GB of system ram, and apparently can use about the same amount of vram, which makes sense since the console has 8GB of shared ram. A 2GB vram card will get you low settings in this game, you need 4GB for high and it seems it can even exceed that. I expected the high possible vram on the consoles would make PC ports difficult.
It's important to note, the game has a 30fps max cap by default and you need to modify config files to change that.