The NH-D15S is an asymmetric single fan version of Noctua's award-winning flagship NH-D15 designed for better RAM and PCIe compatibility. Thanks to the asymmetric design, the NH-D15S does not protrude from the top PCIe slot on most ATX and µATX mainboards. At the same time, 100% compatibility with memory modules of up to 65mm height is ensured by the retracted lower cooling fins and the individual fan assembly. If sufficient space is available, the cooler can be upgraded with a 120mm or round 140mm fan, in order to achieve an even better cooling performance in double fan operation. The all-round high-quality complete package of the NH-D15S is completed by the proven SecuFirm2⢠professional mounting system and Noctuas renowned NT-H1 heat conductive paste. As a complete premium solution, it combines the efficiency of a dual-tower cooler with excellent compatibility and flexible upgrade options.NH-D15 version with excellent compatibilityCompared to the award-winning NH-D15, the S-version uses a slightly offset, asymmetrical design and a single fan instead of two NF-A15 fans. Thus, the NH-D15S offers not only top-class cooling performance, but also excellent RAM and PCIe compatibility.Excellent RAM compatibilityThanks to the retracted lower cooling fins the NH-D15S offers complete 65mm clearance for high memory modules and is thus compatible with most high-end models. Since the cooling fins on both sides of the cooler are retracted, the memory compatibility is excellent not only on LGA115x and AMD, but also on LGA2011, where there are memory banks on both sides of the socket.Asymmetric design for better PCIe compatibilitySince on many current mainboards the top PCIe x16 slot is very close to the CPU socket, it is often blocked by larger coolers. Due to its asymmetric design, the heat sink of the NH-D15S is slightly offset toward the top edge of the mainboard at the intended direction of installation. Thus, the cooler does not protrude on most current µATX and ATX mainboards via the top PCIe x16 slot.*NF-A15 140mm fanThe NH-D15S is supplied with the NF-A15 140mm Premium fan designed according to Noctuas AAO standard. With advanced aerodynamic design measures such as Flow Acceleration Channels, the NF-A15 has quickly established itself as one of the best 140mm fans on the market.Optional dual fan assemblyThe NH-D15S can be equipped with a second round 140mm fan with 120mm mounting holes (e.g. NF-A15) or - for improved performance with simultaneous compatibility with memory modules of up to 45mm overall height - with a 120mm fan (e.g. NF-F12) by means of the additional fan clamps included in the delivery.PWM support and low-noise adapterThe NF-A15 140mm fan of the NH-D15S supports PWM for convenient, fully automatic speed control via the mainboard. In addition, the supplied low-noise adapter can reduce the maximum speed from 1500 to 1200rpm, in order to enable even quieter operation.Excellent component coolingThe large-format NF-A15 fan, which protrudes beyond the cooling fins at the bottom side, not only contributes to the excellent CPU cooling performance of the NH-D15S, but also generates a strong air flow over the high-resolution motherboard components or heat sinks and thus also enables an excellent component cooling.SecuFirm2⢠Mounting systemNoctuas SecuFirm2⢠assembly systems have become synonymous with quality, reliability and user-friendliness. The D15S⢠system of the NH-LGA115x supports Intel LGA1150 (LGA1151, LGA1155, LGA1156, LGA2011), LGA2011 (LGA2011-0, LGA2066-3), AM4 and AMD (AM3 (since 2019), AM2(+), FM1(+), FM2, SecuFirm2(+))) and offers perfect contact pressure and maximum assembly comfort on all current sockets.Compatibility with older and future socketsThe NH-D15S complies with the SecuFirm⢠open standard and can be made compatible with the optional NOCTUA FREE NM-I3 mounting kit to the older LGA1366 and LGA775 sockets. As far as technically possible, Noctua will also offer upgrade kits for future socket sets.NT-H1 thermal compoundNoctuas NT-H1 is a proven TIM solution recommended by more than 100 hardware journalists around the world, combining minimal thermal resistance with excellent ease of use and excellent long-term stability.This text is machine translated.