I don't think that not having a 1 : 1 ratio really lowers performance very much. Obviously, you want to run your ram at the highest speed, but having a faster processor is much more important. Toms has done a test of the impact different speeds have on gaming and normal usage and they found that speeds really didn't have much of an impact. I myself would keep the clocks you have, if that is your max oc, and just try to tighten the timings on the ram.