Yes it is. They both have very similar fps. The r9 390x shines more in 1440p when comparing to a 970
i have an i3 and GTA 5 plays just fine.. avg 45 fps on high it seems you have a lack of knowledge based on some of the post youve been making..
You seem to be making assumptions or getting mis information on dx12. It will not magically make the 860k on par with a i5. Games that are out now that wont utilise dx12 wont benifit from it. Yes it will reduce the so called "bottleneck" of amd cpus but you wont see that happing untill game developers start utilizing dx12 in games. And when that does happen the i5 is still the stronger core and therfore any gains the 860k will get the i5 will get too.