Review on 🔥 Raspberry Pi 4 Aluminum Heatsink with PWM Controllable Fan by GeeekPi - Raspberry Pi 4 Armor Lite Heatsink with PWM Speed Control Fan for Raspberry Pi 4 Model B by Jason Lockwood

Very quiet and cools my pi4 4gb considerably. On boot it works for me. The included thermal transfer stickers worked fine on the CPU, Ethernet, and USB controllers, but the 4th sticker didn't match my memory size. This was roughly the memory size pictured in the product description, but my pi4's memory was slightly narrower and longer. I trim off the excess width and lay it along the length for full coverage. However, when I installed the radiator, it wasn't even making contact with the gasket. The gap was at least 1 mm. I'll either have to remove the sink again to completely remove the panel or just live with it as is and hope the memory doesn't get too hot.