Better than a heat sink, and allowing unlimited add-on cards, the Smart Fan will keep your Raspberry Pi running when things get hot.
GeeekPi Fan Heasink Raspberry Pi 4, Pi Aluminum Heatsink Cooling Kit for Raspberry Pi 4B/3B/3B+ (B Plus) : Electronics
Smart Fan HAT The Best Cooling Solution for Raspberry Pi : Electronics
Sixteen Universal Analog/Digital Inputs HAT for Raspberry Pi by Sequent Microsystems — Kickstarter
Won't boot at all : r/RetroPie
Finally completed my multi zone central AC, controlled by HA : r/homeassistant
Raspberry Pi 5 PWM Cooling Fan With 40*40*10MM Larger Size
Low-Profile CPU Cooling Fan for Raspberry Pi 4B/3B+/3B, with Aluminum Alloy Bracket
How to set up your first Raspberry Pi
Smart Fan HAT The Best Cooling Solution for Raspberry Pi : Electronics
The Ultimate Raspberry Pi & Maker Store– The Pi Hut
Low-profile ICE Tower Silent Cooler Cooling Fan for Raspberry Pi 4B/3B – 52Pi Store
