Product SKU: EP-0226
Product: 52Pi Low-Profile Plus CPU Cooler for Raspberry Pi 5, Aluminum Heatsink – 52Pi Store
This video shows how to assemble the Low-Profile Plus CPU Cooler for Raspberry Pi 5 and how to check if the fan work properly.
Both of the Raspberry Pi 5 fan options plug into the four-pin JST-SH PWM fan connector located in the upper right of the board between the 40-pin GPIO header and the USB 2 ports. The fan connector pulls from the same current limit as USB peripherals. We recommend the Active Cooler case for overclockers, since it provides better cooling performance.
As the temperature of the Raspberry Pi 5 increases, the fan reacts in the following way:
- below 50°C, the fan does not spin at all (0% speed)
- at 50°C, the fan turns on at a low speed (30% speed)
- at 60°C, the fan speed increases to a medium speed (50% speed)
- at 67.5°C, the fan speed increases to a high speed (70% speed)
- at 75°C the fan increases to full speed (100% speed)
Temperature decreases use the same mapping with a 5°C hysteresis; fan speed decreases when the temperature drops to 5°C below each of the above thresholds.
At boot the fan is turned on, and the tachometer input is checked to see if the fan is spinning. If it is, then the cooling_fan device tree overlay is enabled. This overlay is in bcm2712-rpi-5-b.dtb by default, but with status=disabled.