GeeekPi PWM Fan - Low-Profile CPU Cooler with RGB Cooling Fan for Raspberry Pi, Aluminum Heatsink for Pi 4 Model B & 3B+ & 3 Model B (Silver)

I picked the downdraft-style cooler by merit of having two heatpipes, and also blowing air onto and across all components of the board. Although, with such power-sipping components, any heatsink with heatpipes at all is easily good enough.Installation: easy. The cooler comes with all the mounting hardware (plus extra standoffs, screws, and nuts), a nice little acrylic baseplate, and some included thermal pads to interface between the processor and heatsink coldplate. (I opted for some Arctic MX-4 I had lying around.) There's probably no need to worry about proper mounting pressure, just screw in everything hand-tight according to the diagrams in the instructions or possibly get a little help from pliers for the nuts. The included fan is a simple 5V, 40mm fan that is honestly just fine for keeping everything cool. There are two jumper wires on the fan that plug directly into 5V and GND on the Pi's GPIO headers. (You can also swap the 5V for 3V3 if you would like the fan to be quieter / dimmer.) The fan makes a slight whine, but it won't be noticeable unless you are in a quiet room with the fan within a couple feet of you without headphones. At least, it's quiet enough that I wouldn't spend another $15 to swap it for a Noctua... for now.Performance: I was able to easily get my Raspberry Pi 4 to 2147MHz core, 750MHz graphics, though the graphics could probably get even higher. I idled at about 32C and had a max CPU temperature of 45C under extended load (~25C ambient), even with a >600MHz overclock.At $20, it's a pretty significant portion of the total cost of a Raspberry Pi setup, but a good cooler is basically the only way to improve the performance you can get out of the processor. This product may be a little overkill but hey, it gets the job done and looks pretty flashy with its TWO heatpipes and miniature fin stack.

Great fan, easy install and good low pro size. Actually came with 2 fans so I was pleasantly surprised when I opened the box. Didn’t notice that in the description.

Works great for cooling a Raspberry Pi 4.I opted for this over the taller version mostly because I liked the potential for more heat pipe contact with the two separate 5mm heat pipes running through the cpu block vs. the single pipe in the tall version (https://www.amazon.com/GeeekPi-Raspberry-Cooling-Cooler-Heatsink/dp/B07V35SXMC).Setup:I took a dremel with polishing bit and polished the area of the heatsink that contacts the cpu on the rPi, and polished the top of the rPi cpu (probably was not necessary, but I already had the dremel out).I also applied a slight bend to the mounting brackets as to force the heatsink down a little more on the cpu.I only used the mounting plate and hardware provided with the heatsink.Did not use the included thermal pads, I used some silicone thermal paste I had laying around (it was Phanteks PH-NDC).Conditions:Ambient temperatures around 21C, powered with an rPi official USB-C power supply.Temperatures:Running stock settings, at 100% cpu usage temperatures remained under 34C for the 15 minutes I let it run.Using tom's hardware guide as reference overclocked to 2GHz (0.5GHz overclock) and over-voltage (0.15V) the cpu and ran at 100% usage for 20 minutes, temperatures never exceeded 44C.Compared to the stock 80C+ reviews out there for no heatsink, and people being happy with 60C+ with a fan, I consider these temperatures great!Cons:If there was one thing I could change, I probably would replace the fan, the color cycling is meh, and the brightness is borderline annoying, mine will probably get replaced with a less flashy fan at some point in the near future.

Honestly, 95% of the reason reason behind this purchase of the (Low-Profile CPU Cooler with RGB Cooling Fan - Black) was for the bling factor for a self designed case for my 3D printer with a clear side panel to view the electronics. (see photo)So, with only modest expectations for thermal performance, I was pleased to see a 8-9° (C) temp reduction according to the onboard thermistor on my RPI 4B!To be fair, the original heat sink that came with the Pi was making only partial contact and was crammed into a RPI case with a tiny little fan. Now, in a purpose made enclosure with significantly better airflow and with an actively cooled heatsink that makes perfect chip contact when installed with the included standoffs & thin pink thermal pads, this solution was bound to be more effective anyway. *Your mileage may vary.*NOTE* I did take the time to carefully scrape away the paint/powdercoat from the contact surface of the heatsink assy. Probably wouldn't make a huge difference if you buy the black version and choose to omit this step. It just felt like I was giving this inexpensive little gadget the best chance for succeeding at it's intended purpose.Overall, my expectations were exceeded and I wouldn't hesitate to buy again if I needed another Raspberry Pi 4.

Pros:-easy to install-allows safe overclocking-low profileCons:-not the best thermal spread with the provided adhesion sticker (a little too thick for what it should be. It should (ideally) have minimal space between the metal conductor and CPU)-not enough space between mounting plate and other components (can’t place heat sinks on other components on the board)-^^ that being said, it should have also been able to cool other components on the board given its size.-fan is ever so slightly loud (you can replace the fan pretty easily but it should’ve been provided with it for the money)Overall this a decent cooler for your RPi for a somewhat decent price. Mounting could be better, the fan could be quieter, and it should have been able to cool the other components but it’s still pretty good with a low profile. Would recommend. Not many other options similar to it.