He literally said:
So his spec are more than good enough. Also the game has system requirements that are more than needed.
MINIMUM
CPU: Intel Core i5-2500K 3.3GHz, AMD Phenom II X4 940
GPU: Nvidia GeForce GTX 660, AMD Radeon HD 7870
RAM: 4 GB
Storage: 6 GB
OS: 64-bit Windows 7
DirectX: Version 11
RECOMMENDED
CPU: Intel Core i7 3770 3.4 GHz, AMD FX-8350 4.0 GHz
GPU: Nvidia GeForce GTX 1060, AMD Radeon RX 580
RAM: 8 GB
Storage: 8 GB
OS: 64-bit Windows 10
DirectX: Version 11
Hardlec, try installing MSI Afterburner and run RTSS to look at usages while you're playing. Along with that run HWINFO while playing to register and monitor your other necessary info just in case. HWINFO and MSI AB can both run independently with their default settings. Nothing will happen as long as you do not turn on gpu voltage monitoring in msi ab for no no reason since hwinfo will do that for you while you look at rtss in game. Also make sure to monitor your ram and other memory usages as I think this game is full of memory leaks.
If you notice gpu mem and ram maxed, lower all details from ultra to high and keep textures at max, and lock frames to 60 (for a start) and disable antialiasing and turn on vsync.
If there are still slowness lock frames to 30. If there are still problem lower textures to medium. If there are still problems it's probably a new memory leak.
Also gpu usage itself will never go down in this game regardless of how low you set settings. And locking your framerate and using vsync at the same will make it more smooth and stable and increase the lifespan of your gpu.
Ideally you should use the settings I mentioned, turn on vsync and lock framerate to 30. This will lessen some of the load on the cpu and free up at least some ram.