Running at 1440p scrubbed out the lower-end cards. The HD 7950 was good for just 30fps on average with a 24fps minimum. To maintain at least 30fps or more at all times you'll need at least a GTX 680 or GTX 960 from Nvidia or R9 290 from AMD, though the R9 380 did come close with a 28fps minimum.
Nvidia's big guns were still able to reach the 60fps limit and while the GTX 980 was good for 60fps on average, it did drop down to 51fps at times.
The older GTX 780 Ti and GTX 780 performed well here and we've become used to seeing the GTX 780 rubbing shoulders with the GTX 960 lately rather than the GTX 970. The R9 390X was slightly slower than the GTX 970 and GTX 780.
Sorry for the absence of the Fury X and Fury graphics cards but AMD can't send us samples at this point and we can't even buy them.