Keep in mind that they are using 980Ti SLI to achieve those results with 4000mhz memory. There was practically no scaling when using a single 980Ti. I agree 3200Mhz CL14 is a nice spot to be in for gaming.
True, but is a 980 Ti in SLI any faster than a single 1080 Ti?
Future single GPUs will match and surpass 980 Ti SLI levels, of course games will be more demanding too.
Guess the faster your GPU is, the more RAM speed matters, which makes sense.