Which i7? And do you have an SSD? To be fair, another 8GB RAM should be needed as well as a GPU upgrade and an SSD if you don't have one yet, but these upgrades will benefit your entire system and other games, not just DCS, so might be worth considering. DCS running respectably on your average gaming PC might be a year or so down the line yet, so even with an upgrade, you may not see the results you were expecting for the money spent.

- Ice