GeeekPi Fan for Raspberry Pi 4, 30x30x7mm DC Brushless CPU Cooling Fan 3.3V 5V with 7PCS Heatsink for Raspberry Pi 4 Model B,3B+,Pi 3 & Pi Zero/Zero W & Retroflag NESPI CASE Plus (2-Pack)

This was perfect for my need, which was for a SNES type case for my RPi 4 4GB. They're very quiet, and though they don't move a lot of air, they move enough to keep the inside of the case cooler than otherwise. And I have a spare if needed.Though I didn't have need for them, the little nuts and bolts, as well as the heatsinks, are a nice addition. I've no doubt the come in handy for a lot of people.

I have a custom case for my pi4. I have an active temp controlled fan but it was ridiculously loud when it ramped up. Adding these in the case as passive cooling keeps my Overclocked temps during emulation under 50c! Highest I've seen on stress tests is 47c. Much recommend.

This was more effective than I thought it would be after reading several comments on this type of fan. I am running a Pi3 affixed to the back of an HDMI touch screen 7" monitor.. The fit is very close and raises the Pi3 temperature quite a bit. The Pi3 is running a program that uses OpenCV and tkinker graphics using all 4 cores. The temperature was hitting 80C about 10 minutes after startup and started throttling with an aluminum heatsink on the CPU. I 3d printed an adapter plate to hold this fan about 1mm away from the heatsink and ran the fan at 5V. Now the temperature stays stable at around 58C. I'm impressed.

These fans can be used for slow or fast speed which is a plus, noise wise they are quiet in comparison of some case kits out there. Noise levels can vary based on case materials and airflow. Been using two of these fans for almost a year without any change in performance or noise, ended up replacing the fan in another case just to see if these fans were any better and yes it made a small difference by a few C.As far as temps:Pi 3B with heatsinks (Plastic case slightly modified for this fan):Before fan: 60CAfter fan: 55C (slow)After fan: 48C (fast)Pi 3B+ with heatsinks(case with more airflow):Before fan: 60CAfter fan: 50C (slow)After fan: 45C (fast)

I resisted Pi fans and heatsinks for the longest time, since I couldn't imagine how a tiny 5V fan could make things any better. However, my most recent project pinned me against a wall - Pi would quickly get to 85 degrees and stay there. I decided to give this a try, since I didn't really have much of a choice - project had taken months and I couldn't just abandon it.After mounting the fan and heatsinks, I was very surprised to see the drastic decrease in temperature. Monitored it for hours, and while the surroundings got noticeably warmer, the Pi always managed to stay below 70. This is fairly remarkable, since all I added is 3 heatsinks - and the fan itself is tiny, running off the Pi's own GPIO pins.Needless to say, I will never doubt Pi fans again - they saved my project.

Works perfectly and not noisy!

When run in full speed mode, you get good cooling and annoying fan whine.On low speed, you get minimal cooling and acceptable noise.Take your choice of effective vs tolerable noise level. Fortunately, my pi is on a device which is itself in an enclosure.

Great little fans that provide very good active cooling for the raspberry pi4.

Fonctionne tres bien

Very nice fans for my Raspberry Pi, I use it to play retro games and watch Youtube on the Raspberry Pi light OS => no more temperature warning, no more speed throttling because of overheating ! Cherry on the cake : I was able to install one on my Lego-made case with the provided hardware ! I'm a super satisfied geek !

These worked great. My Pi 4 model B processor went from 55C to 34C with fan & heatskinks installed.

Functionally they are fantastic but if you need more than 2, the 4-pack version gives way better value hence the star

Works fine