[Product Information]

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Compared to the award-winning NH-D15， the S-version uses an off-set， asymmetrical layout & a single instead of dual NF-A15 fans. This allows the NH-D15S to provide state-of-the-art heatsink performance while maintaining superior RAM and PCIe compatibility.
Thanks to its recessed lower fins， the NH-D15S provides 65mm clearance for tall memory heatsinks， making it compatible with most high end modules on the market.
As the lower fins are recessed on both sides of the heatsink， compatibility is excellent not only on LGA115x and AMD， but also on LGA2011 where there are RAM slots on both sides of the socket.
Complying with Noctua's AAO standard and featuring sophisticated aerodynamic design measures such as Flow Acceleration Channels， the NF-A15 has quickly built up a reputation as one of the best 140mm fans on the market.
Due to its asymmetrical layout， the fin-stack of the NH-D15S is off-set towards the upper edge of the motherboard when installed in standard orientation. This allows it to clear the top PCIe x16 slot on most current ATX and ATX motherboard.
Extending below the fin-stacks， the large NF-A15 fan not only contributes to the superb CPU cooling capabilities of the NH-D15S but also provides massive airflow over surrounding motherboard components and heatsinks
Using extra fan clips， NH-D15S can be upgraded with either a 2nd round-frame 140mm fan with 120mm mounting holes for max performance or a common 120mm fan for improving performance while maintaining compatibility with RAM modules of up to 45mm height.
The NF-A15 premium fan supplied with NH-D15S supports PWM for convenient automatic speed control through the motherboard. In addition， the max. fan speed can be reduced from 1500 to 1200rpm using the supplied Low-Noise Adaptor for even quieter operation.