Raspberry Pi 4 Fan, iUniker Raspberry Pi Cooling Fan 30x30x7mm Brushless CPU Cooling Fan for Raspberry Pi 4 Model B, 3 B+, Pi 3, Pi 2, Pi 1 B+, RetroFlag NESPI Case(2-Pack)

Was looking for a fan that would fits inside of my Rpi 4 Canakit case. Fits snug, works great, and moves a lot of air even when setup for low speed (3v). Low speed is very quiet, high speed (5v) does have some noise but that’s to be expected with a 6000 RPM motors. Cheap cooling upgrade to protect your Rpi project.

These fans work as advertised. The split leads let you decide if you want to hook the fan to the 3.3v or the 5v leads. This gives you the option of high speed or medium speed cooling. I have dropped the temperature of my Raspberry Pi 3B+ from 50 degrees celsius to 37 degrees celsius. Now I feel safe leaving Pi-Hole running on it 24/7 without concerns of a catastrophic hardware failure in a few months. The passive cooling from a heatsink may be enough for light, occasional use, but if you leave your Pi on all the time active cooling is a must.If you are good with a Dremel, there is no reason to purchase a specialized case for the fan(s). Thirty minutes and 25 cents worth of window screening material was all it took to add active cooling to my 7" official touchscreen display case.

Used in the Retroflag SuperPi case and it works perfectly. It's very quiet and moves quite a bit of air for its size. Not a ton, but enough that it will help. The wires were of the perfect length. Very happy with this.Update: I'm glad I went with the two pack. It turns out that the first fan was bad. It started making odd noises, like the hub is rubbing inside, and though I thought it pulled a good amount of air, the second one pulls a lot more. I've never used one of these small fans, so what I thought was a good amount wasn't. I put the second one and it works as it should.I'm going to contact iUniker. I don't know that they will actually do anything for a $4 fan, but we'll see. Took two stars off because of the issue. The second one does work very well, though...so far.Update 2. iUniker's response to my contact has been great and the issue was resolved to my satisfaction. I'm adding a star back on because of it. They're definitely a company that cares about their customers.

Fans worked better than I expected. My Pi(v4) would run about 50°C inside a canakit case under normal conditions. I overclock my Pi to 2.0ghz and w/o the fan it was getting to the low 80°s. After adding the fan and setting it on low it was back to the mid 50°s and with the fan on high it is stable at 41-42°s. With it on high there is some noise but when playing games the sound is plenty high enough to drown out the fan noise.I just need to find out if I can write a script to control fan speed with temperature variations. The only downfall is having to take the case off to adjust speed .

Most Raspberry cases provide enough ventilation (IMO) that even under heavy sustained load and overclocked, they seldom need more than passive cooling with some even small radiators. I have seen some very tight metal and wood cases that these fans would probably be helpful. My application is more about making it look great, as I build a Pi server rack and these little guys just look cool. They are plug and play if you want to just stick them on the 5v headers and have them running constantly, a little more work to get them set up for variable power. They are small, and quiet and move a decent amount of air for the size.

UPDATE (2 months of 24/7 use): The fan has started to make a noticeable noise recently, and it appears to be getting louder. Since it was a 2-pack, I replaced it with the second fan, but I'm not confident this one will last any longer. I'm disappointed in how quickly this fan began making noise. I don't know if it's due to the bearings having problems (does it even have bearings?) or if it somehow got clogged with dust (there doesn't seem to be much dust around the fan), or what else, but I wish it could have lasted longer. The new replacement fan is running perfectly silently now, just as the first one did initially. We'll see if it lasts! As a result, I have Iowered my score from 5 stars to 3 stars.I purchased these and some USB-A to pigtail adapters so I could use a USB port to power them. I am using one on the outside of a mini PC to blow air into the case and cool the NVME SSD drive. It lowers the SSD drive temperature by about 10 C! It's also very quiet, even while mounted on the outside of the case.

I have bought 2 sets of two of these fans for my Pis. They work great. I only wish the wires were like 1cm longer so I could plug them into the 5v pin instead of the 3v pin. The case I use has the fan position just like 1cm too far away from the wires making to the 5v pin.On 3 volts they are quiet and have all right airflow. I would still recommend adding heatsinks to the Pi.

Easy to install. Previously my Raspberry Pi 4 CPU was being throttled with temperatures over 80°C. Now with these heatsinks and fan and it runs a comfortable 50°C.

Following a power outage, the fan of my Labist Raspberry Pi case started making a lot of noise. I don’t know if the power outage has anything to do with this, but this fan is the perfect replacement for the original one in the Labist kit. It is a bit pricey and I found out a bit too late that I could have ordered a complete case for about the same price. I don’t really care as long as the fan last longer than the original one (3 months).

Fit perfectly and works cooling the circuit board quietly and efficiently.

Perfect fit, wire cover is a stiffer plastic but it works, just have to be careful when routing.