Bigbruin.com has posted a review on the OCZ Technology PC3-10666 ReaperX HPC 2GB DDR3 Kit

With the 6-5-5-18 timings, the OCZ Technology 2GB PC3-10666 ReaperX HPC DDR3 Dual Channel Memory Kit is very impressive right out of the package at 1333MHz. Testing showed that it can outperform other comparable memory with looser timings, providing a quick plug-and-play upgrade for those who aren't all that into overclocking and tweaking their BIOS.

OCZ Technology PC3-10666 ReaperX HPC 2GB DDR3 Kit Review