Well I want to buy a pair of Crucial Ballistix elite ram to go in with the rest of my other Elite ram, but the problem is that I am trying to buy an 1866mhz frequency version and I have 1600mhz in my system. Is it possible to add this ram into my system? Do I have to configure my existing ram to a higher frequency? I am trying to get the 1866mhz version since it is cheaper at the moment than the 1600mhz for some reason.