Neptune DN120

Silence Has Never Been Cooler

The optimal fan blade structure utilizes noise-reduction technology without sacrificing cooling efficiency. The pitch-dark blades channel the aura of deep space and create frigid temperatures to match.

Bested the Tested

The Neptune fans underwent rigorous testing, fortifying a strong pressure-to-airflow P-Q curve. The critical middle section indicates that the Neptune fans possess high static pressure and airflow that outperforms the competition.

True Air Benders

Besides enhancing speed, the Neptune series creates a more balanced performance, which includes reducing noise. Turbulence, resonance, and pitch from air dispersal were all taken into consideration. InWin dissected the fan's anatomy to produce these silent high static-pressure fans.

InWin’s Semi-Anechoic Chamber’s background noise level is at 17 dB(A). The sound test distance between the fan and the microphone is 1 meter.

Neptune DN Fan
Without airflow leakage

Regular Fan
With airflow leakage

Turbine Blade Design

Experience quiet cooling and efficient airflow with InWin’s signature Turbine Blade design. Molding the fan blades into the frame creates a more concentrated airflow, preventing air leakage and irritating noise pollution.

Neptune DN Fan
Airflow Concentrated

Regular Fan
Airflow Dispersed

Ahead of the Curve

Neptune’s fan blades are angled slightly to ensure the airflow is channeled in a more focused stream. This tactical design allows the static pressure to increase.


The Neptune case fan series PWM initiates at an immediate 900 RPM. This will provide enough airflow to cool loading PC systems while producing an extremely low noise level at 17.2 dB(A).

DN120/DN140 Cable Information
PWM Fan Cable


Model Neptune DN120 Neptune DN140
Quantity Included Single Pack
Model Number IW-FN-DN120-1PK IW-FN-DN140-1PK
Colors Black
Fan Size 120 x 120 x 25 mm 140 x 140 x 25 mm
Materials PBT, PC
Rated Voltage DC 12V
Rated Power 1.92W 2.16W
Rated Current 0.17A 0.19A
Speed Mode PWM 900 - 2200 +/- 10% RPM PWM 900 - 1800 +/- 10% RPM
Air Flow 23.87 - 60.1 CFM 41.67 - 88.89 CFM
Air Pressure 0.36 - 2.27 mm / H2O 0.49 - 2.18 mm / H2O
Connector (Fan to Fan) Non-Modular Cables
Connector to M/B 4-Pin (12V, PWM)
Noise Level 20.5 dB(A) (Normal) 24.5 dB(A) (Normal)
Bearing Type Long Lifespan Sleeve Bearing
MTBF >36,000 hrs.
Net Weight 180 g / 0.4 lbs 210 g / 0.46 lbs
Gross Weight 215 g / 0.47 lbs 250 g / 0.55 lbs
Package Dimensions
(L x W x H)
125 x 30 x 150 mm
4.92 x 1.18 x 5.9"
1147 x 28 x 170 mm
5.79 x 1.1 x 6.7"
Warranty 3 Years
* InWin's products comply with RoHS regulations.
* Specifications may vary based on different regions.



News / Reviews


Neptune Series is on InWin Official eStore Now!

Europe USA

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