Raspberry pi best heatsink comparison benchmark

raspberry_pi_3_heatsinks

Raspberry Pi manufacturer have stated you don’t need heatsink for the normal operation of the Raspberry Pi device, however overclocked or heavily stressed devices will benefit from heatsink installation.
I decided to compare available heatsinks on the market and have found the best heatsink for Raspberry Pi 3.

First tested heatsink is small – 14x14x6mm, priced 1$ on Ebay
It has an adhesive layer for mounting on CPU.

raspberry_pi_small_heatsink

Second heatsink – is larger 50x25x10mm, also priced 1$

raspberry_pi_large_heatsink

Mounting was done with Arctic Silver thermal compound and и super-glue 🙂 Thermal compound was applied to the center and glue – to the corners of the chip.
Please note that this will be a permanent solution, and you will not be able to remove the heatsink.

For loading the CPU I used stress software (apt-get install stress).
Only 1 core of Raspberry Pi 3 was loaded – frequencies: arm_freq=1290 core_freq=430

Here are the temperature graphs:

raspberry_pi_temperature_heatsink

Red line – no heatsink.
Blue – small heatsink 14х14
Gren – large heatsink 50х25

For a price of 1$ you can greatly improve temperature of Raspberry Pi 3 – by 8 degrees in idle state and by 13 degrees under moderate load.

4 thoughts on “Raspberry pi best heatsink comparison benchmark

  1. Thank you for sharing your results of RPi3’s thermal management testing. It would also be helpful to know the particular reason for employment of only 1 of the the 4 cores during your performance of the CPU stress testing.

    • it would overheat 80+ C if running even 2 cores for 100% in 2-3 minutes regardless which heatsink you use, but that should not be a common usage scenario for Raspberry pi.

    • That chip is ethernet/usb controller, which doesn’t require any cooling.
      Also the height was different from main CPU, so it would be impossible to cover with single heatsink.

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