When using top-flow coolers (such as the NH-C14, NH-C14S, NH-L12, NH-L12S, NH-L12 Ghost S1 Edition and NH-L12Sx77) in a tower-style case, we strongly recommend installing the cooler with the heatpipes in horizontal position or with the bends of the heatpipes pointing downwards. Please avoid installing the cooler with the bends pointing upwards, as this may result in reduced cooling performance. In desktop cases, the cooler can be used in any orientation.