I built my first pc like 3 months ago and I installed 8 gb of corsair ddr3, on my asus mobo p8b75 m-lx, and my RAM sticks are supposed to reach 1866 MHz but they work at a maximum of 1600 MHz. I have tried everything, I used memtest to see if something was wrong with them but everything was ok, I have tried several times to change the settings on the bios but as soon as I reboot my computer, it crashes and I have to disconnect my psu. I contacted corsair to see if they could help, they first asked me to send them a screenshot of the memory timings seen in the cpuz app, but everything was ok, they also told me to activate x.m.p, I had tried that before they told me to and it didn´t work, but I did it again and nothing happened and after that, they just stopped replying my messages. I don´t know what else to do, and I also don´t know if I am doing something wrong, please help me guys, if corsair staff won´t help me, you are the only ones left.