Designed to offer increased accounting for both memory modules and PCIe slots, the NH-D15S is a single-vented asymmetric version from Noctua's popular NH-D15 flagship model. Thanks to its asymmetric design, the NH-D15S frees up space for PCIe slots on most µATX and ATX motherboards. In addition, the use of a single fan and the reduction of the lower fins of the radiator ensure perfect compatibility with memory modules up to 65mm. For users with a certain margin of manoeuvre in terms of the available space, it is also possible to improve performance even further by installing a second 120 mm fan or a round 140 mm model on the front of the radiator. Packed with the SecuFirm2™ ultra-secure, multi-socket professional mounting system, the renowned Noctua NT-H1 thermal compound and backed by a full 6-year manufacturer's warranty, the NH-D15S is a complete premium solution combining the efficiency of a dual fin stacked radiator with an incredible level of modularity and compatibility.