2PCS PWM Controllable Quiet 4010 Fan 40x40x10mm DC 5V for Raspberry Pi 4, 3 B+, Pi 3 (Black)

Same size and connections as the Ice Tower fan, or just a general good fan to add to an RPi project. Since it uses the standard pin headers, can easily connect to any other SBC. Though not moving too much air, they are quiet, which works well for unintrusive environments.

Exactly what I needed for my PIs

Great replacement fan for the Pi 4. Quiet at 5 VDC and they even gave me a spare!

Great fans for Raspberry Pi projects.

First of all, this is a larger fan than I intended to order, I was looking for a PWM fan to replace the "standard" size fan that most cases come with. My fault it is what it is. With that being said, and not wanting to deal with a return, I decided to go ahead and modify my case to use it, and I'm pretty happy that I did! This fan is set up to be a "pull" fan. I personally prefer push fans on a Pi. To use it as a pull fan, it barely fits between the camera and display port if you use one of the "9 layer cases." And the screws are uncomfortably long in my opinion, I would definitely shorten the screws to have them recessed in the fan a little bit. You would definitely not be able to use it in a pull configuration in a case like mine with heat syncs. On the positive side, this fan is VERY quiet, much better than 20mm fans, and the PWM control works as expected. During a 10 minute stress test, in a push configuration, the fan was able to drop the temperature from 75C to ~62C in about 15 seconds(what I had the fan cut on/off set to). Would I recommend it? Sure, if you have a case set up for a 40mm fan, or you dont mind modifying a case.

Under Fedora 41 running on a Raspberry Pi 3b+ adding dtoverlay=gpio-fan,gpiopin=18,temp=50000 to /boot/efi/config.txt runs this fan (assuming you have the pwm input connected to GPIO 18/pin 12) once the CPU temp gets above 50C.

The fans don't move a lot of air, but they are very quiet, which was the priority for me in my case. However, the first fan stopped working after one day. Luckily, I only needed one, and the second fan has been working properly for a couple of days now. It would have been nice to have a backup, though. Given that I only got one working fan for the price, I am rating this a 3 out of 5. If both had worked, I would have rated these a 5. UPDATE: Seller contacted me quickly and offered to make it (more than) right. For that reason, I am upgrading my rating to 5 stars. It's rare for vendors to stand 100% behind their products and this vendor deserves credit for that. Thanks!

I was able to just stand it off the end of the board blowing half the air over the CPU heat sink and the other half between the board and the m.2 card mounted under the board. I set the cofig.txt line to trigger at 50c and under the load of an Influxdb/node-red/MQTT stack, Pihole and running python scripts watching the USB and BLE for new data (~25-30% avg load) it cycles between ~49c and ~41c about every 5min.... so a duty cycle of ~50%. Pre-fan, with the tall heat sink it was running at about 75c. It's very quiet when it's running. It doesn't interfere with Bluetooth comms as the jury rigged 12v old zeon cpu fan I tried first did. Wes' commentary on using GPIO-18 was most helpful for hookup instructions. Thanks.

Excelente producto, funciona perfecto

Good fan with fairly good airflow, I got it for my Pi 5 (yes it works if you were wondering) but i didn't use the blue (TXD) connector because it kept turning it off even when the pi was hot-ish. Good.

The GeeekPi PWM Controllable Fans for Raspberry Pi are fantastic! They’re the perfect size at 40x40x10mm and fit easily onto my Raspberry Pi setup. The PWM control allows me to adjust the fan speed, giving me the flexibility to keep my system cool without unnecessary noise. The fans are quiet yet efficient, ensuring my Pi runs at optimal temperatures during long sessions or heavy use. The 2-pack is great value, and the installation was a breeze. If you want to keep your Raspberry Pi cool while maintaining control over fan noise, this is an excellent choice!

I have split these into a USB and use them as one to intake air into my NVR,and the other to cool the heatsink on it,as the NVR I have only came with 1 exhaust, definitely quite,the nvrs exhaust fan reduced it speed quite a bit and found it doest stutter during phone viewing,and the NVR is actually well ventilated on a bench,this blows quite a bit of air for how small n quite these are.highly recommend

It works as advertised, not too noise.