I'm running on:
i5 7500 3.4ghz
8GB Ram DDR4
GTX 1060 6GB
The game auto'd everything to 'very high' settings so I tried it. - bit of stuttering and tiny slow downs when say an airstrike came
I lowered a few settings to 'high' or 'medium' and the game runs pretty damn well.
You can refund any time up to the release date on Steam anyway.