Don't self bump. Some mods will delete your post for that.
What is the rest of your system? No matter what the motherboard manufacturer says the memory controller is on the CPU in all current generation Intel and AMD CPUs. So overclocking the RAM is actually overclocking the CPU ( the integrated memory controller part anyway ). This can cause problems. Especially trying to run very low cas latency.
The good news is that with the integrated memory controller very high speed or very low cas RAM is no longer necessary. There is a 1% or less gain in cerain apps and in gaming the gain is 0. 1.5v DDR3 1600 cas 9-9-9-24 2T is the sweet spot.
My advice is to run the sticks at their rated voltage, speed and timings.