Kingston HyperX 4GB Kit 1600MHz (KHX1600C8D3K2/4GX)
 

With Intel's 1156 platform making its way into enthusiast's hearts, dual channel has since become the budget builder's memory channel priority. Lacking a triple channel memory controller, Intel's 1156 Socket CPU's include a newly integrated dual channel memory controller that happens to respond surprisingly well to overclocking.

http://www.bjorn3d.com/read.php?cID=1734

ugh? based on what? Enthusiasts are sticking with S1366 afaik for most 3D and 2D multithreaded benchies.
only for SuperPi the S1156 and Core i5 dual cores are ruling the rankings