OK, if I were you I would try and make it 8-8-8-24 and set the Command Rate to "2."
From there, make sure that the RAM isn't too high when you OC the CPU. For example, is it DDR3 1333? Well, try and keep it at that speed with those timings.. When you OC the CPU, just try and keep it to around 1333 for the RAM with 8-8-8-24, Command Rate 2 (as opposed to 1). It's not a huge deal if its 1300 or 1330, but try not to go over 1333 because that is where instability can occur.
I hope this was helpful in some way to you! :P Sorry if it wasn't.