Noctua NH-D9L

Visual inspection

The Noctua NH-D9L is a small form factor CPU cooler that uses a single 92mm fan. The design and shape of this CPU cooler are similar with that of the Noctua NH-D15, thanks to the dual tower heatsink.
The dimensions of the heatsink are: (H)110mm x (W)95mm x (D)95mm.


The heatsink uses a dual tower design, and has a height of just 110mm, with a width and depth of 95mm. Thanks to the small foot print of the heatsink, there is no need to integrate an offset on the heatsink itself or the heatpipes.

The total weight of the heatsink with the fan installed is 531g.


The NH-D9L has a total of four copper made heatpipes. These have an outer diameter of 6mm and are also nickel-plated to match the rest of the heatsink. The heatpipes are arranged in a standard U shape to facilitate the heat dissipation, in addition, the heatpipes are soldered to all of the cooling fins.


The endings of the heatpipes are exposed, however these are machined symmetrically and do not require a cover. Thanks to them being shaped symmetrical, the overall design of the cooler remains unchanged. This is worth mentioning as deformed or uneven heatpipe endings will often break the symmetry of the aesthetics of a cooler.


The baseplate of the cooler is made from the same nickel-plated copper material as the four heatpipes. The surface of the baseplate is smooth and has a reflection similar with that of a mirror, however small circular marks are still left from the manufacturing process. The heatpipes are soldered directly to the back side of the baseplate, thus, ensuring an optimal heat transfer between materials.


The heatsink uses approximately 70 aluminum cooling fins, or around 35 fins per heatsink tower. These fins are made from aluminum and have a solid construction, which makes them quite hard to bend out of shape. The sides of the fins are bent downwards to not only channel the airflow but also to increase the sturdiness of the heatsink itself.


In order to dampen the vibrations even more, the heatsink has small rubber pads placed on the lower inner side of one of the towers. These pads are designed to provide a good and solid base for the fan to sit on.


The NH-D9L uses a single 92mm fan, however the heatsink can accommodate up to three 92mm fans. The used fan is a Noctua NF-A9 PWM model, and has a maximum speed of 2000RPM and a minimum speed of 400RPM. The fan has rubber pads on the corners of the frame to dampen the vibration and prevent any scratches on the heatsink.

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

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