Ram OC Problem on Gigabyte Motherboard

My motherboard is Gigabyte Gaming X v2 rev 1.3 and whenever I use XMP or try to overclock my ram manually it just simply doesn't work. I do not have gigabyte control center or app center because I've heard they suck. I try in my bios to overclock my ram and when I boot it up again, I check task manager and it says its at 2133Mhz. I have tried slower speeds than 3600Mhz and still doesn't work and I am 100% sure my bios is up to date. Any solution to this?