@DubbleClick
Because there are many things that you do not think about and apparently don't understand, and you want to prove me wrong rather than trying to understand. So here we go again...
FX CPUs have lower minimums? Even though they do, it's not as bad as you're making it out to be.
GRID: 53 vs 58, both dropped below 60 but stuck above 50. No major difference. Advantage for Intel, but insignificant in reality.
Bioshock Infinite: Min of both unplayable, both average above 60 but are below 75. Advantage for Intel, but insignificant in reality.
Dirt: Again. Advantage for Intel, but insignificant in reality.
http://www.tweaktown.com/tweakipedia/58/core-i7-4770k-vs-amd-fx-8350-with-gtx-980-vs-gtx-780-sli-at-4k/index.html
So lower minimums... That is somewhat true. But WHY? Because with DX11, only ONE core can communicate to the GPU at the same time. Considering that the FX CPUs have weaker cores, and that one core has to send ALL the data to the GPU, the FX CPUs will struggle a bit more at times causing the larger drops. With DX12 and Vulkan, where each core can communicate to the GPU independently, this will no longer be an issue. Mantle even showed this, where the FX-4170 had a higher minimum framerate than an i7 4770k. Since you like Tomshardware results so much;
AMD FX 8350 + AMD R9 290x(Mantle) - Min FPS 55.2 Avg FPS 77.6
AMD FX 4170 + AMD R9 290x(Mantle) - Min FPS 38.8 Avg FPS 58.7
Intel Core i7-4770k + AMD R9 290X(Direct X) Min FPS 37.4 Avg FPS 56.7
http://www.tomshardware.com/reviews/amd-mantle-performance-benchmark,3860-4.html
I don't know what other 'evidence' you need, although you're probably only wanting to acknowledge 'evidence' that suits your biased view.
Speaking of other evidence, yes the R9 290x beats the GTX 970 at higher resolutions in a significant amount of games. Even the R9 290 sometimes does. Anandtech:
And if you're arguing about minimum framerates, the R9 290x can even compete with the GTX 980 at high resolutions:
http://www.anandtech.com/show/8568/the-geforce-gtx-970-review-feat-evga
And CPU limitations are still quite insignificant, even in DX11. This is one of the worst examples:
When an FX-4xxx beats not only an FX-8xxx, but also the i5 4690, you know something weird is going on. This is the exception, not the rule, and it's easily solved by setting the affinity in task manager of the FX CPUs to 4 cores converting it into a virtual FX-4. Most situations are like this, where even though the minimum is lower, it doesn't matter AT ALL:
http://www.anandtech.com/show/8864/amd-fx-8320e-cpu-review-the-other-95w-vishera/5
So recommending the 970 over the 980 just because you have to choose between an FX and an i7 is nonsense. The weaker CPU with the stronger GPU is the smarter choice. Anyone who recommends the Intel with the GTX 970 must be biased towards Intel. There is no other conclusion.