Noctua company introduced a new quiet  case fans A series  sizes 92, 80 and 40 millimeters.  All models use a recognizable colors Noctua and rely on a number of proprietary technologies like advanced acoustic optimization (AAO) framework and a variety of design tweaks that improve the aerodynamic properties of the products.
The main characteristics of the fan can be found below:
|
NF-A9 PWM |
NF-A9 FLX |
NF-A8 PWM |
NF-A8 FLX |
NF-A8 ULN |
NF-A4x10 5V |
Dimensions |
92 x 92 x 25 mm |
80 x 80 x 25 mm |
40 x 40 x 10 mm |
Bearing |
SSO2 |
SSO2 |
SSO2 |
SSO2 |
SSO2 |
SSO2 |
rotation Speed  |
400-2000 r / min |
1600 r / min |
450-2200 r / min |
2000 r / min |
1400 r / min |
4500 r / min |
Airflow |
up to 78.9 m³ / h |
64.6 m³ / h |
up to 55.5 m³ / h |
50.4 m³ / h |
34.8 m³ / h |
8.2 m³ / h |
Noise level |
22.8 dBA |
17.1 dBA |
to 17.7 dBA |
16.1 dBA |
10.4 dBA |
17.9 dBA |
Static pressure |
to 2.28 mm water. Art. |
1.62 mm of water. Art. |
up to 2.37 inches of water. Art. |
1.96 mm of water. Art. |
1.05 mm of water. Art. |
1.78 mm  water. Art. |
Power supply |
12 |
12 |
12 |
12 |
12 |
5 |
MTBF |
150,000 hours |
150,000 hours |
150,000 hours |
150,000 hours |
150,000 hours |
150,000 hours |
Price |
€ 17.90 |
€ 15.90 |
€ 12.90 |
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