Does upgrading my system boosts performance?

First of all, I don't know where to post it so I'd rather stick this topic to technical stuffs. And, this post doesn't have a major technical issue towards the game.

Now, according to my topic, I have GTX560 Nvida Graphics card, 16GB Ram Memory, 1TB HDD, and Intel i7 processor. The game runs fine to me but I want to ask a question if having a higher computer specs will give be better performance and graphics. What's the potential FPS of a certain huge events? Does anyone ran some test of some sorts?

Will wait for your answers and thank you in advance! Happy gaming!

Depends on the settings, resolution, etc.

Most likely, a graphics card update would help but you shouldn't need more memory, HDD, or processor. A faster storage device (like SSD) may improve load times but will not improve graphics or the speed at which things actually render.