PiBOX India Heatisnk for Raspberry Pi 4, 3 Pieces for Raspberry Pi Heavy Duty Copper and Aluminum Heatsinks with Thermal Conductive Adhesive Tape for Raspberry Pi 4B Model B - 3 Pieces- Gold Color

I have raspberry pi 4 2GB model. Heat sinks are good. They stick firmly with not problem. Definitely not as effective as fan but still makes a huge difference in keeping cpu ram and usb controller cool.you will get 3 heat sinks (claiming copper) one for CPU, one for RAM and one for USB controller.I have tested before and after and i watched 4K video on youtube with no lag and temp was maxed at 75.and without heat sink it is around 100. so definitely a good option in this price range.

I have a custom network gateway + firewall with openWRT running on Raspberry Pi which has to run 24x7x365 and takes care of whole of my premises network. Even though network components are placed in a much cooler location. Still the temperatures on peak network usage used to go beyond 51 degree celcius. I removed the adhesive from the CPU and network heatsink and used a thermal grease from Cooler master and attached the Pi with a FAN.However used the same shipped thermal adhesive for the RAM one.Now my Raspberry Pi Firewall is around 10 to 10.5 degree cooler. Around 37 to 38 degrees when idle and peaking to 41 degrees when under heavy usage.Happy with the product.

I am running this aluminum heatsink without any fans, in the raspberry pi case fully closed. Earlier temps used to 58-62C. After this, the temperatures are between 48-55C. But I had to remove the adhesive pad below the main heatsink, had to scrape it off, as it did not make any difference in temperatures. Used a touch of thermal paste on the cpu chip and applied the heatsink directly.Not sure about the country of manufacture.

Bought the whole set just for the single copper heatsink. Came with black adhesive on the fins which couldn't be cleaned off. However, the cooling was satisfactory. Price is okay too, but the adhesive is lost if the heatsink is pried off again.Don't buy any of these heatsinks if you are planning to buy the Official cooling fan as you won't be able to close the case. I had to pry off the heatsinks because I bought the case fan as well.

Using on wifi router, hot to touch means conducts heat and increase in signal strength and range means dissipating heat.Amazingly 3m stickies are holding on really good my router is kept so that heat sing are perpendicular to the plane of sticking! Also 3m tape seems to conduct heat as well, i keep touching em time 2 time to ensure if they are hot to touch and indeed they are.

Good for low to medium load, main processor heatsink slips down if pi is mounted vertical due to its weight and weak adhesive of thermal pad

The heat sinks attached properly to a Raspberry Pie 4B. I was also able to use the official case along with these heat sinks applied. I'm giving a four star rating because the packaging was open and the items could've fallen off any second. The items are good quality though.

The heat sinks have a perfect fix inside the pi box and the temp was just 42 with normal usage.