NoctuaNF-A4x20 5V PWM, Premium Quiet Fan, 4-Pin, 5V Version (40x20mm, Brown)

----- Start of Update 12OCT24 -----The Noctua Fan had previously received many high regards, so I decided to run it longer term and compare it with the orginal Caizhu Fan on the Bitaxe 401 Supra.One can fully customize the settings to run at varying input voltages and pair them up with varying frequencies. I just "picked on" one setting and ran the Bitaxe with the original fan (Caizhu), then the Noctua, as follows:ASIC Voltage Requested: 1.166 VASIC Frequency: 475 MhzFan RPM Setting (Manual): 75%Caizhu Fan: 6,896 RPMBitaxe Power: 12.0 WattsASIC Temp: 47°CExpected Gh/s: 606Run Time: 15.043 hoursAverage Shares p/Hour: 378.052 (Total Shares this Session: 5,687)Shares p/Rejected: 145.821Average Rejected p/Hour: 2.593 (Total Rejected this Session: 39)Gh/s Ranges: 473-810Efficiency Ranges: 17-21 J/ThBest Difficulty (this session): 4.6MNoctua Fan: 5,538 RPMBitaxe Power: 11.6 WattsASIC Temp: 46°CExpected Gh/s: 606Run Time: 15.211 hoursAverage Shares p/Hour: 380.436 (Total Shares this Session: 5,787)Shares p/Rejected: 170.206Average Rejected p/Hour: 2.235 (Total Rejected this Session: 34)Gh/s Ranges: 442-802Efficiency Ranges: 17-21 J/ThBest Difficulty (this session): 4.01MNow, other settings can render different results, but I will just say the obvious, the Noctua doesn't need to spin faster to move more air, it's designed that way, it's why it's good (and I was too quick to judge). It allowed the Bitaxe to consume a bit less power, run 1°C cooler and was also a bit more efficient in the long run.After giving it a fair shake over the last week, I prefer the Noctua over the Caizhu and I know someone else in the house that REALLY appreciates how quiet it runs. I would purchase a Noctua fan for any future Bitaxes that I acquire.Rating increased from 4 to 5 Stars.----- End of Update 12OCT24 -----The NF-A4x20 5V PWM came in a fancy package, with wiring adapters and mounting hardware.I just needed the fan.This fan is the fastest of the Noctua fans, rated at 5,000 RPM +/- 10%, which mine ran at just over 5,400 RPM when I installed it on the Bitaxe 401 Supra.I was disappointed to find that at MAX RPM (5,400), it did not move more air than the stock CAIZHU-FAN (I ran it at 6,750 RPM, or 88% fan speed on the Bitaxe).Even at the MAX speed of 5,400 RPM, the Noctua allowed my Bitaxe to run 6°C hotter than with the CAIZHU-FAN at 6,750 RPM (88% of MAX speed).Furthermore, this Noctua fan causes my Bitaxe to consume 16.2 Watts, versus 15.2 Watts with the stock fan. So, in short, it moves less air and consumes more power :^|On the other hand, the Noctua runs extremely quiet, as advertised "14.9 dB(A)", while the CAIZHU-FAN runs a bit noisy, especially when passing 5,000 RPM.It's up to you.Do you want to run your Bitaxe hotter by 6°C and consume an extra Watt of Power, but it's much quieter?Do you want the sound of the fan in the background, evidence of work in progress, but the Bitaxe runs better?If Noctua would make a 40x40x20 5V PWM fan that was rated at 8,000 RPM, I would love to compare that in operation to the stock CAIZHU-FAN on my Bitaxe 401 Supra. If it cools more, I would be a fan of the Noctua (pun exquisitely intended).

Got this to replace the stock fan on a bitaxe, works good and is silent. Would buy again.

Unless I'm running something intense, the PWM fan is usually off. Then when the Jetson Nano gets warm the fan turns on just enough to cool it. I never notice this fan - I have to look at the blades to see if it's spinning because it's so quiet. The default fan I replaced came with a third party acrylic Jetson Nano case, it was not PWM, always running full speed and a noisy little fan at that. I've seen other comments on the default fan saying it's not very loud. I suspect the low quality, default case fan varies in noise from unit to unit. If you want quiet - Get the Noctua PWM! I got the thick one, so I had to find some longer screws. I should have gotten the thin one which I expect would work fine and use the existing HW. At any rate, if quiet and sanity are worth a couple coffees to you, get the Noctua PWM fan, such an improvement over the default fan that came with the third party Jetson Nano case.

This mini fan is cooling my fiber modem and works 100% better than the raspberry pi fan I was using and it's quieter! 5v 4x20

This is a very good fan that fitted well on my Nvidia Jetson Nano. It has a very low noise when it is running at full speed. I did some experiments by running various loads on the CPU to see how it behaves and it worked really well to keep the CPU temperature at the set value.It has a very pleasing color combination for the fan and the outer cover. The package comes with attachments (cables) and screws. The only problem I had fixing it on the heatsink was that the screws were slightly bigger than the heat sink, but I just swapped it with another set of small screws that fit well.

Very nice High quality replacement fan. I used it to replace a Dyeing OEM fan on a Fan kit for a USB Miner.See: https://www.amazon.com/dp/B0BKRD5BM3?psc=1&ref=ppx_yo2ov_dt_b_product_detailsTakes a bit of basic skills to swap out. Snipping wires on the Original Fan USB A cable, and then connecting it to this fan using supplied connectors or soldering then Shrink tubing / insulation. If your skilled and picky use soldier to connect then insulate individual wires.Works well, more blades than the Original fan, super quiet as a new item. Time will tell.

I purchased this fan as a replacement for the one which came with ICY DOCK ToughArmor HDD enclosure. I went with Noctua brand because of the reviews and I am really impressed with the product. The build quality is pretty good and noise level is perfectly suited for desktop PC installation. I was looking for a fan that can operate quietly and at the same time provide adequate airflow into the HDD enclosure. This product lives up to its great reviews and reputation. There is nothing much for me to say, I would definitely recommend it.

These fans are amazing. They are SILENT. And I don’t mean that they are just quiet. They make ZERO noise. Absolutely incredible.