Noctua NH-D15S

Visual inspection

The Noctua NH-D15S is the highly anticipated all black version of the NH-D15S. The main advantage of the NH-D15S over the regular NH-D15 is the increased clearance for both the RAM modules and the graphics card.
The NH-D15S has a dual-tower with an offset heatsink design uses just a single 140mm fan.

The dimensions of the heatsink are: (H)160mm x (W)150mm x (D)135mm.


The heatsink has the same overall shape as the one used by the NH-D15. The dual-tower design is efficient and allows for the usage of multiple fans. While the NH-D15S only comes with a single 140mm fan included, it can be used with a second fan. The materials used within the heatsink are aluminum for the cooling fins and nickel-plated copper for the heatpipes and the baseplate.

The total weight of the heatsink without the fan and fan clips is 980g.


The NH-D15S uses a total of six heatpipes to move the heat away from the CPU. Each of these heatpipes has an outer diameter of 6mm and all of them are arranged in the classic U shape. Just like the rest of the cooler, the heatpipes are also covered by the matte black coating which is a characteristic of the series.

The contact between the heatpipes and the baseplate is done through soldering of the two components together.


The endings of the heatpipes are exposed at the top of the heatsink. However, these are machined perfectly and are symmetrical. This little feature makes the difference between Noctua and other manufacturers who choose to cover the endings of the heatpipes instead.


The baseplate of the cooler is made from the same nickel-plated copper, just like the heatpipes. The coating is applied only on the sides and underside of the baseplate, while the contact surface is left exposed. The baseplate surface is smooth and has a mirror like reflection.


The cooler uses a total of 45 aluminum cooling fins on each of the two towers. These make direct contact with the heatpipes and the base of the cooler. The sides of the fins are shaped downwards creating a stacked structure. This not only improves the look of the cooler but also increases the rigidity of the heatsink.


The 7 lower cooling fins are trimmed down to increase the clearance for the RAM modules. In addition, this is done on both sides of the heatsink, making the NH-D15S ideal even for systems that have RAM modules on both sides of the CPU socket.


The NH-D15S has a single 140mm fan which is also part of the series. The fan is the NF-A15 HS-PWM model, and has a height of 140mm and a width of 150mm, with a thickness of just 25mm.

The NF-A15 HS-PWM uses the SSO2 bearing system which provides better stabilization of the fan and increased reliability of the bearing. The fan has a minimum speed of 300 RPM and a maximum speed of 1500 RPM. If the included low noise adapters are used, the maximum speed of the fan is lowered to 1200RPM.


The cable of the fan is covered by high quality sleeving and the connector used for power is a standard 4 Pin PWM.

2 thoughts on “Noctua NH-D15S

  • November 16, 2020 at 8:20 am

    There’s an error in the article: “The cooler can be acquired for around 89.99 US dollars or EUR, which is around 50 US Dollars less than the NH-D15, and on average 10 US dollars more expensive than the normal NH-D15S cooler.” In fact D15S is 10 EUR/USD less expensive than D15 and not 50 EUR/USD. Otherwise good review, keep up the good work!

    • November 16, 2020 at 12:01 pm

      While I agree with you, the pricing is a bit weird at the moment. The NH-D15 can be had either for relatively cheap, or for a big markup, I saw that product retail as high as 200 USD. However, you do have a valid point, and I have edited the article. Thank you for letting me know! 🙂


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