This is a dedicated aluminium heatsink designed specifically for the Raspberry Pi Compute Module 4 (CM4). The heatsink is black and comes with a screw and thermal tape pack for attaching to your Compute Module 4. The mounting holes on the heatsink match the Compute Module mount holes perfectly. A notch is included to allow for the CM4 antenna kit to be attached without obstruction, and the heatsink can even be used with the Official Compute Module 4 IO Board or the Waveshare Compute Module 4 PoE Board. In testing, Waveshare found that the heatsink reduced temperatures by ~11°C vs the bare CM4 board (your mileage may vary depending on usage and local conditions). Dimensions: 55x40x5mm Note: CM4, IO board and antenna kit not included. How to Install 1. Attach thermal tape on to the CM4, fix the nuts and standoffs to the heatsink: 2. Fix the screws asper the images below, depending on your chosen method: https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2023-03-07 https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2023-12-27 https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2024-09-19 https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2024-11-29 https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2024-11-30 https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2025-08-05 https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2025-11-28 https://elecena.pl/product/22722545/aluminum-heatsink-for-raspberry-pi-compute-module-4-cm4 2025-11-29