|商品尺寸||9.2 x 9.2 x 2.5 cm; 226.8 克|
|电池||1 未知型号 需要电池。|
Noctua AAO 框架设计 SSO2 轴承静音风扇（NF-A9 PWM）
Noctua AAO Frame Design SSO2 Bearing Quiet Fan(NF-A9 PWM)
- 轴承类型：SSO2（自稳定油）刀片：A 系列（带流加速通道）框架：AAO（高级声学优化）
- 气流：78,9 m3/h，静态压力：2.28 mmH2O，声噪声：22,8 dB(A)，旋转速度：2000 rpm (+/- 10%)
- 气流 L.N.A. 62,6 m3/h，静压，L.N.A. 1.53 mmH2O，噪音带L.N.A. : 16,3 dB(A)，转速，带 L.N.A. ：1550 rpm (+/- 10%)
- 接头类型：4 针 PWM，PWM的*小旋转速度：400 rpm (+/- 20%)
- *大 输入电流：0.1 A，*大 输入功率：1.2 W，电压：12 V
- Bearing Type: SSO2 (Self-stabilizing Oil) Blade: A-Series (with Flow Acceleration Channels) Frame: AAO (Advanced Acoustic Optimisation)
- Airflow: 78,9 m³/h, Static Pressure: 2.28 mmH2O, Acoustical Noise: 22,8 dB(A), Rotational Speed: 2000 rpm (+/- 10%)
- Airflow with L.N.A. 62,6 m³/h, Static Pressure with L.N.A.: 1.53 mmH2O, Acoustical Noise with L.N.A.: 16,3 dB(A), Rotational Speed with L.N.A.: 1550 rpm (+/- 10%)
- Connector Type: 4-pin PWM, Minimum Rotational Speed with PWM: 400 rpm (+/- 20%)
- Max. Input Current: 0.1 A, Max. Input Power: 1.2 W, Voltage: 12 V
NF-A9 是一款高度优化、高品质安静的 92 毫米风扇。 NF-A9 采用 Noctua 的 AAO（高级声学优化）框架以及复杂的空气动力学设计测量方法，如流量加速通道，进一步提高了著名的 NF-B9 安静冷却性能。 PWM 版本运动 Noctua 定制设计的 NE-FD1 IC，可通过 4 针风扇接头进行全自动速度控制，并配有低噪音适配器，可将 PWM 控制期间的*大速度从 2000 降低到 1550rpm 。 它*顺滑，参考级 SSO2 轴承，Noctua 值得信赖的优质品质使其成为*苛刻需求的卓越选择
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The top speed is between 1930 and 1950 RPM it will variate the speed or maybe it is speedfan doing that.
At below 1100 RPM I can not hear the fan over the power supply or cpu fan.
From 1150 RPM I can begin to hear it but barely.
1200 RPM and above I can hear the fan but it is still quite until 1600 RPM which is 80% speed.
At this speed and above to 100% you just hear the air moving but no whine, motor noise or anything annoying that most fans sound like.
The smaller traditional case fans will sound like a weed whacker or leaf blower while this fan you just hear air moving and no other auxiliary noises, whine or vibrations from the fan itself.
I would not set it to a specific speed and just let it run constantly at that speed. You want it to ramp up when needed and then quite back down to room level but still running, you just don't need to hear it constantly. Search for SpeedFan to control this and then look up on Youtube "JayzTwoCents SpeedFan" to get a detailed tutorial on how to use the software.
He mentions setting his Fan Control Controller setting to "Sum of speeds" this works until you add multiple Temperature tracking say from each core in your CPU then in this case you set it to "MAX of speeds" or it won't work.
One temperature tracking == Sum of speeds
Multiple temperature tracking == MAX of speeds
As most people I don't like the brown poop color of the fan but my case does not have tempered glass sides so I won't ever see the fan anyway.
Don't buy a cheap $10 or less weed whacker sounding fan, spend more and buy this one because you only hear air moving above 60% RPM versus vibrations, motor whine and sometimes ticking the cheapo fans make.
I also installed the flexible mounting plugs instead of using the traditional screws that also come with the fan. Either way this fan does not make noise other than air moving at high speed and at 50% I can't hear the fan at all.. Nothing.
If you're like many consumers, you accept the cooling fans installed by the manufacturer, and look at fans like this and their cost, and say "meh".
Ironically, I'm am/was IT professional in the same situation...
However, when I finally got around to buying a new server [versus hand-me-down units] for use at home, the fan noise that I accept at work [in a separate IT room] became unacceptable in our home office.
Did some research and found this brand. Admittedly there are other makes/models out there and I'm approaching this as a fan newbie...
I can summarize our findings by saying that my keen-eared better half questioned whether the server was actually powered on... that much drop in noise levels.
Using the server's built-in hardware monitoring, fans are running at about 50% of top RPMs for the case fan [this 92mm] and at about 70% for the CPU fan [an 80mm] and temperature swings have abated along with the noise. These move the air a lot and with their blade design coupled with the cushioned mounts, do it very quietly.
The fans ship with a short power jumper that shifts the fan speeds to an even lower range with a drop in maximum speed, and this works quite well, dropping fan noise to totally inaudible. Due to the presence of four 3.5" spinning drives in the server case [and their heat], I erred on the side of caution and restored the fans to their native speed range, with only a slight difference in noise, and no change in temperature/cooling.
Based on experience so far, I can't praise this line highly enough...
install was dead easy - while I had to solder the smaller PS fan to its connector, these plugged right in. Routing the wire was a bit tricky in the smaller box but the fans also contain an extension cord which is more than long enough for the task. They fired right up on start-up and are noticeably quieter than the original fans. Quite happy - I only wish I had thought of this half a decade ago instead of listening to those two fans running 24-7 on my desk. I'll know for sure i the summer, but right now this was definitely a good purchase.
I've replaced all my computer fans with Noctuas, with the interest in minimizing noise, and they have proven consistently reliable, so I would recommend them to others looking for fans for a similar application.