This is a good set and 3 out of 4 pieces go together. The two smallest pieces are the same size, but the two smallest pieces on the board are different sizes. This makes setting up a fourth heatsink a bit tricky. It eventually fits, but it would be nice if the latter was a bit smaller. There were two sets, so I used two heatsinks from one set on my Raspberry Pi 3 (see photo).
New to the Raspberry Pi, these items are a welcome addition to my electronics collection. Delivered quickly and arrived quickly, well packaged. They seem to be of good quality, you get two sets of 4 to cool the most important parts of your raspberry pi. Each radiator has glue on the back and so far they stick well. I don't often buy radiators, but I think that's a good price. would recommend.
Simply adding these fanless heatsinks resulted in a temperature drop of 1-2 degrees C on a Raspberry PI 4 with 4GB RAM at 23.3 degrees C - the board is tilted 45 degrees with some large ones open Enclosures ( glass, with open edges 55-56 Β°C without heatsinks, 53-54 Β°C with heatsinks This is a value for the internal temperature of the processor Adding a fan would drastically increase the cooling compared to the pure heat airflow A higher air temperature (or lower) may not be a linearβ¦