Legit Reviews posted a review on the Corsair Vengeance Pro Series 16GB DDR3 1866MHz Memory Kit
A quote from the article:
So, was the Corsair Vengeance Pro 1866MHz DRAM kit pretty sweet? I must say it absolutely met my expectations, and this includes everything from appearance to performance. I was able to overclock these modules from 1866MHz with 9-10-9-27 2T timings to 2000MHz with 9-9-9-27 1T timings with the same 1.5 volts. I also managed to bump the modules up to 2200MHz with 9-12-11-32 2T timings, but had to bump the voltage to 1.58v...Corsair Vengeance Pro Series 16GB DDR3 1866MHz Memory Kit Review @ Legit Reviews