Cocage Arrow also know as the Thermalright Silver Arrow, minus the heat pipe caps. Two CM Excalibur fans keep it cool, usually ambient air temp, on a X58 sli rev. 1 and a 960 oc'ed at 4.25ghz since it was installed. My other i7 is cooled by a Noctua NH-12, both lapped but no longer as heavily oced. My goto heatsink for recommendations has and probably always will be the CM Hyper 212, I've installed more of those than any other heatsink and sold even more.