"However what really disturb me from a comparison stand-point is that they gave the i7 5960X 2133 MHz DDR4 vs 2933 MHz DDR4 for the Ryzen 7 1800X, that give the 1800X another opportunity to shine since infinity fabric run at the same clock as RAM but why wasn't the 5960X also given the same speed RAM? It can't run it?"
Per Intel's ARK, the i7 5960X supports up to 2133 MHz DDR4. It has four memory channels, though, giving it more memory bandwidth on paper. The 1800X still makes do with only two memory channels, so the fact that it matches the i7 in speed is quite impressive.