To max out the 60fps cap at 1080p with not only the average frame rate but also the minimum, gamers will want a R9 290/390 or GTX 970/780 Ti. Falling just short was the older GTX 770, 780 and Titan along with the more mid-range R9 380.
Those wanting to keep their minimums above 40fps will only require an old HD 7950 Boost or GTX 680. Meanwhile, more recently released graphics cards such as the R9 280 or GTX 960 will do nicely as well.
At the low end, for a 30fps minimum or greater PC gamers will get by with the R7 370 or GTX 950 -- not bad given the quality settings used.