for Raspberry Pi Fan, 4Pcs for Raspberry Pi Cooling Fan Brushless CPU Cooling Fan Heatsink Cooler Connector Separating One-to-Two Interface 3.3V 5V for Raspberry Pi4 Pi3 B+, Pi 3, Pi 2, Pi 1 B+

This little fan is perfect for any projects involving Raspberry Pi. I am currently using them in 3 Pi's: 3B, 3B+ and 4B (2G). Like anything cooling related, many factors are in play, case airflow, heatsink or the lack of, thermal paste or not, etc. There is a very cool Youtube channel called Explaining Computers. They have an excellent video on Extreme Cooling for the raspberry Pi. In any case, with a well ventilated case (I 3D printed mine) medium size heatsink and one of these fans, here is what I got: 42 to 44C for the Pi 3B+, 39 to 41C for the Pi3B and somewhat 45 to 46C for the 4B, this last one I reversed the airflow and it had the opposite effect. The jury is still out there on whether this fan is powerful enough for all applications, but for low to medium load it works fine and it is very silent. The connectors make it super easy to attach to the GPIO pins on the Pi.

It's a cheap fan that comes in four pack. It was quiet at first, but it's starting make a little noise. Still not bad for the price. Works with the 3d printed case.

I've used two so far and they work fine, just enough air flow for small electronics that need a bit more than passive cooling. Had to return the first package because one of the fans was missing the sticker that keeps the oil in the motor. Seller was non responsive but amazon was great as always on the return.

If you're just using these to cool a raspberry pi, itll probably be fine. But at 5V, theres hardly any noticeable airflow. They are very quiet though. Once you crank it to about 12 volts, then it starts blowing well, but sounds like a jet taking off.

I have some 3 and 3B PI's that starting making noise. This was a fast and easy replacement. I replaced all 3 and quiet as can be now.Good value.

I have only used one of these but so far it is working well. It makes almost no noise. It doesn’t move much air but with a Pi3 it doesn’t need to.

The longevity of these little guys isn’t quite what I was hoping for, and they weren’t a direct replace my for a case I had. They are nice little fans, but I roughly had 4-6 weeks from the first fan installed before it started making some pretty impressive noise. They don’t appear very user serviceable, and I’ll likely try a different fan in the future. For right now though, the Raspberry Pi will remain powered down.

Very low speed, and silent. Perfect for the raspberry pi 4's cooling needs. I 3d printed a very tiny and simple bracket to hold it over the CPU and voltage regulator area. I've fitted at least 4 raspberry pi's with these, and it seems like they don't even need those stick on aluminum heatsinks if they have a fan.