You need to investigate why your graphics card is not performing to spec.
You have a nice upcoming setup. This may seem like we are picking on an item specifically but I do believe you need to bring your attention to your video card.
The GTX 960 is base level gaming card. Simply check out the posted specs. GeForce GTX 960 | Performance | GeForce
(I know guys, a link to an nvidia page #cringe ...jk)
The video card itself is stating, it barely pushes above 35fps in Middle Earth: Shadow Of Mordor. You are in need of a new graphics card my friend.
A brand new RX 580 or RX 570 with 8GB of course would fit your build very well. An alternative is also a 1060 6GB.
P.S. I will always advise you to look at MSI as they are nicely clocked and quieter then most.