ive got a 4790k at 4.6ghz, switched to 16gb earlier in the year, added my other 8 to get 24gb and just this week switched the 8 with 16gb to get 32gb total. (2133mhz)
works fine, no problems with anything.
For what reason did you need the ram?
been doing some 3d rendering - still goes over 32gb sometimes
i'm only playing for fun really and my cpu is fine for everything else, but 3d rendering sucks up every mhz i throw at it - i really need 64 threads instead of 8!