http://www.guru3d.com/articles-pages/amd-fx-8350-8320-6300-processor-4300-performance-review.html
Intel fans have been running around saying this nonsense so long its like a religion to them .
But the reality is quite different . The FX 6300 is only marginally less powerful than an intel 2500K . In some situations its fractionally faster . In most a shade slower . And a fraction of the price .
The catch is that it only does well in games that can use all the available cores , and the intel is better if the game engine is 8 years old and cant multithread .
The FX 6300 would not bottleneck a GTX 970 at stock speed in modern games at 1080p resolution .
If you read the above link closely you see how amazingly close it is in Crysis , and how much it suffers in the intel optimized Far Cry .
But the far cry result is meaningless . Monitors refresh at 60 Hz and that is 60 fps . The monitor will just drop any frame above 60 and it will never appear on screen .
That means that even where the FX appears to be worse it gives the exact same user experience so long as it is above 60 fps