4K = 8,294,400 pixels
Your resolution = 11,059,200 pixels
You're asking your 970's to render somewhat higher than 4K in pixel count, even the R295x2 and new Titan X would be brought to their knees. There is no consumer card currently in existence that could run that resolution, at ultra settings at minimum 60fps. Maybe if you went with 2 or 3 Titan X's in SLI, but I didn't spend as much money on my first car and first year's of insurance (which is astronomical for young drivers in the UK), as what that set up would cost.
I knew that's higher resolution than 4k, and I did do quite a lot research including linus tech tips and guru3D benchmarks before upgrading.
I was not expecting to run games like BF4, Far cry 3 at max setting at all. As a matter of fact, I can only run those games with mid to low settings no AA to maintain 60 fps.
But, everything maxed out, I'm getting 300 or 400 fps in iRacing, 60fps(with patch) in NFS rival vs 15-30 fps in AC. And to be honest, I would not call the graphics amazing at all in AC compared to the other 2 while racing.
Not to mention all the bugs reported on AC forum you get in triple monitor and/or SLI/crossfire setup.
As for FFB, there's not much I can say about grip racing since I don't have much real world experience. Drift handing with CSW v2 in AC is far from realistic compared to LFS, I have few years real world experience with 3 cars.
Like the graphic setting, I spent I guess around 3-5 hours researching and tweaking every single option on the wheel, wheel driver and in game setting. Just can't get it feel right. Too much ffb, you gonna hurt yourself, dial down ffb, you have to throw the wheel for every transition otherwise the car spins. I remember I might have spent about 10-30 mins in iRacing and LFS and never touched those settings again.