MHz will not go higher I tried two kits on this board the Samsung(G.SKILL 3200kit) kit hits a maximum of 2933MHz and these SK Hynix(HyperX 2666kit) kit hits 3066MHz maximum I tried 3133 but no good...
I checked support site for QVL of RAM and few sticks could hit 3200MHz(3600+ kits) mostly high end kits using the Samsung B-die and yes I am quite sure this B450 board has latest BIOS.