After looking at the lack of a heat sink over half of the VRM package I was leery of pushing too hard on the ECS X79R-AX. But push it did and offered up a higher overclock than the Sapphire Pure Black X79N by over 100MHz. The ECS BIOS allows the user to adjust the voltages in positive or negative increments instead of a fixed value for the CPU. By adjusting the vcore up and enabling LLC I was able to push the Core i7 3960X to 4653MHz using 1.46v.



Link: OCC