|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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Some cost saving advice: don't buy a Noctua CPU cooler. Buy a Cooler Master CPU cooler (I went with the Hyper T2 as it is the biggest one that fits in a standard case) and take off the Cooler Master fan and buy one a Noctua fan. For ~$27 combined you get what Noctua wants to charge $60 for. The Cooler Master fan sucks and doesn't allow you to reduce the fan speed below ~30%, so it needs to be replaced if you want to go silent, but the Noctua NF-B9 is exactly the same size fan and it is easy to replace it once you realize you can pull off the rubber pads that obscure the fan screws.
Another learning, don't trust that the fan controller on your motherboard is doing everything as it should. First, I had to go into bios and change it to PWM mode as it assumed DC mode for the system fans even though it comes with 4-pin fan headers (DC mode doesn't allow it to spin at nearly as low of a speed). Next, it appeared when I was first testing the B series fan that the lowest it could go in PWM mode is 13% based on the RPM data the motherboard was providing. But then I noticed the fan was still spinning when I put the PWM at 10%, so I figured the fan wasn't providing good RPM data below 13%. (I later noticed that the A series would show RPMs down to 10%, further giving credence to that idea.) Next I noticed it would stop spinning below 10% (both A and B series), so I assumed that was the lowest the fan would go. Not so on either count! I later hooked up the NF-B9 fan to my GPU and it could both spin the fan and read its speed as low as 5% PWM (never tried with the A series fan, but I assume it could go slower too). So apparently my motherboard has it's limits that it won't go below. For all I know, the fan could go even lower than 5%, but that's the best the GPU fan controller will do. (Luckily, even 13% is slow enough to be silent in almost all scenarios.)
But the long and short of it, is that with 4 of the Noctua fans (A9 on the CPU, 2x B9 on GPU and 1 B9 on the rear of the case) and leaving the front of the case fan off unless the system gets hot (trying to save a few bucks and not replace the 12" fan unless I need to) as well as an EVGA gold power supply in "eco mode" I have a truly silent PC, where a pretty sensitive dB meter can not detect it being on. I have to do the test in the middle of the night, because even cars going by outside are detectable. But at 3 AM, it reads 21.1 dB with the PC off and 21.1 dB with it on. My stomach gurgles and the stupid thing goes up to 24 dB or I click the mouse and it goes up to over 30 dB so trust me when I say the dB meter is sensitive enough to detect pretty small readings.
To be fair and give a caveat, to keep it silent, the fans are running at 13% on the rear of the case, 10% on the CPU and 5% on the GPU. But that's just enough air flow with the good heatsinks that in normal operation the system temp stays around 40 and both the CPU temp and GPU temps stay in the mid 50's.
Intel Core i3-8100 CPU
MSI Z370M Mortar motherboard
Gigabyte GTX 1050 Ti "Windforce OC" GPU (Note: Gigabyte is the only vendor with a good fan controller on their 1050 GPU. The other companies have junk 2-pin fans.)
2 of 4 GB DDR4 2400 Kingston Fury DIMMs
Samsung 960 EVO M.2 SSD
EVGA 650 GQ PSU in eco mode
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.