Oops I personally am running X99. As the tweaker in me wants to mess with timings and eek out a little more, I'm not sure there's really a point. Besides the fun of just doing it I guess.
it affects cpu performance in games and lightroom
with a dual channel ddr4 platform the gains are 10-30% increase in cpu performance but with quad channel it would be less
video editing sees no noteworthy improvement
the gains from ram depend on how much time the cpu is waiting on data not already in its cache
so well optimized\easily predictable software doesn't see much benefit from higher ram speeds