GeeekPi Raspberry Pi Cooling Fan, Raspberry Pi ICE Tower Cooler, RGB Cooling Fan with Raspberry Pi Heatsink for Raspberry Pi 4 Model B & Raspberry Pi 3B+ & Raspberry Pi 3 Model B

Before Raspberry fixed there OS to run cooler, this was a very good way to get good cooling performance for your Raspberry PI 4. Fan moves a good amount of air and isnt terribly loud. Fan blades arent sharp so you dont have to worried about little hands getting hurt around this fan. Fan rotates colors : red, green, blue, and purple. There is no control or on/off for the lighting.

Not sure what the thickness and sheerness stars are for...warmth - well, it removes that so I didnt give it stars for warmth - we need one for coolness instead. I use a pi4 on bad solar power days when I dont want to run the big 8 core + big nvidia content creator box, and overclock the pi to 2 ghz as well as overclocking its little GPU to make it a decent daily driver. I also got the nvme gumstick adapter for mine and the combo is a winner that draws much less power than a display. I dont need the lights, but hey...

I can overclock without worrying about it overheating. A+

I have 2 of these now the second one I just got Feb 2021 came with a second non led fan that did not come with the first one, its nice to have a spare! I have not overclocked yet but these keep the temp below 38c.`1

Easy

I use this in a GOES receiver system. It has definitely helped to reduce the CPU temp. Cheers!

Love this RGB fan for my Pi4. They generally run hot but the thing has been cool as a cucumber since I got this. Definitely recommend.

I want to preface that this is SUPER overkill even when overclocking a Pi but RGB Tower cooler on a PI for the LOLz this thing is AWESOME

So I have a 4gb model raspberry pi 4 that I want to run some emulators on. I overclocked it to 2ghz core speed and 700mhz video clock speed. This little thing runs very hot though, and will throttle down at 85c. I installed this, pushed a Dreamcast emulator to run Marvel vs Capcom 2, and it never went above 38c, mostly at 37 (I am running a monitor on my main PC to test).

This is an excellent cooler and very aesthetically pleasing with the color LEDs of the fan. It consistently keeps my RPi4 (with light to moderate workload) at 29 deg.C, which is fantastic.