Make and model of your ram and motherboard? In fact please list your system specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
G.Skill rams tend to be good out of the box overclocking rams in spite of having low advertised frequency's. You could be able to overclock DDR4-2400MHz rams to 2666/2933 and perhaps 3000MHz but you will need to be wary of the timings and voltage.