30 PCS Raspberry Pi 4 Heatsink Kit with Thermal Conductive Adhesive Tape, Aluminum Heat Sink Cooler and Copper Heatsink for Raspberry Pi B B+ 2/3/4/5

I’m using a handful of these on a solenoid/housing for a CO2 regulator/bubble counter since the water tends to evaporate pretty quick. With a few of these stuck onto the solenoid/housing, evaporation slows down a lot. Typically it takes about a week for the water to evaporate but now it can last up to over a month or so. So these heat sinks are definitely doing their job.

Nice heat sinks they stick very well so the adhesive is good. Replaced a motherboard in a TV and use several of these On the components that failed on the original due to high temps I also added a fan which is another review I left for the 120 mm fans

Great price and lots of different sizes. Used for my e90 EKP3

Purchased these for a project but realized that although these may work for the Raspberry Pi, they are not big enough for the chips I want to cool. I really wish the listing indicated the size in inches so that I would not have to convert from metric.

Keeps my adapter cool and even with the high power draw from my grow lights. I have lots of seedlings and need my lights to be a full brightness for good germination. For-get-me-nots, Alyssum, primrose, and Sundews, I lost too many adaptors trying to power my lights, they get hot and then...pow, adaptor is dead. Not with these sweet heat sinks. Even when I move my setup and jostle things they stay secure and keep everything cool to the touch.

All temps in Celsius......... Since you have to pull out a mortgage to get your hands on a RPI I settled on the OrangePi 5. I can verify that these "work" on it. The CPU sink is just a tad smaller than the CPU. But the memory sinks are spot on. As stated elsewhere, the adhesive tape they put on them is GARBAGE! Max'ing out all the cores the OPI5 will show temps in the 85 range without heat sink (but with a fan blowing straight at it). Adding the heatsink to the CPU with the garbage tape they supplied, it gets down to about 75. I peel the tape off, scratched away all the gooey residue, cleaned the contacts with a qtip and alcohol, and used some Arctic MX-4 compound I have laying around. Temps are now around 60-62 under full load. Could probably get down under 60 if these were a little bit taller. But for now, it seems like these are just light enough to stay stuck on with the grease. I plan to have my cluster built with them standing up on their side, so I will soon see if the grease is enough to hold them on. Will update if not. I'm thinking a day or 2 to let the grease set up. As for temps, I'd say with thermal paste these are just fine.

Cooling system very easy because of its aluminum material. Very easy to install and it has adhesive to put onto pads with no problem. It also has a copper piece with the raspberry pi logo on the opposite side which is also cool I really like that. So it cools on top and also on the bottom dissipating heat. So great usage. Definitely five stars comes with every pad you basically need even if some are bigger than the pad that's still pretty decent for heat dissipation either way. Cons? If you put it on the wrong device it's hard to take off? Lol no real cons

I bought them to cool the MOSFETs on my motherboard when I play heavy games, and they also make it look nice, great price and quality, very fast shipping