This tower heatsink promises a 40-degree drop in Raspberry Pi 4 thermals

Need some extra cooling for your Raspberry Pi? Perhaps to overclock the unit beyond its reference specs or to ensure that thermal throttling is negated. You might not need to look any further than the Blink Blink ICE Tower CPU cooler from Seeed Studio. 

This cooler design is effectively the Raspberry Pi equivalent of the Cooler Master Hyper 212, albeit miniaturised. This cooler uses a single heatpipe to cool a relatively large aluminium heat stack, which is, in turn, cooled using a small 40mm fan. This cooler is designed to keep the Raspberry Pi 4’s (and 3 model B/B) main SoC cool under load. In Seeed’s retail listing, this heatsink promises to lower the Raspberry Pi 4’s load temperatures from 80 degrees Celcius to 40 degrees. Not bad for a sub-$20 CPU cooler. 

Perhaps the only downside to this cooler is its support for “Blink fan” RGB lighting. Thar said, it is worth noting that an older, blue LED model of this cooler is also available.