i want to buy memory ram for my AMD A8 6600K . I have two options - 1866MHz memory or 2133Mhz memory. I saw , with faster memory i will get better performance. But this AMD A8 6600K have max 1866Mhz memory controler. If i buy 2133Mhz memory, my system will be stable at this speed? This will affect my CPU memory controler or something?? I don't want an unstable system or to damage in time my components. As motherboard i have gigabyte-ga-f2a85x-d3h .This motherboard support up to 2600Mhz memory (OC)