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I've been doing some research with the new RPi 3B+, but have been struggling to find much information about effective cooling for overclocking. I have seen some solutions such as

  • Heatsinks (small ones that come with CanaKits or larger custom ones)

  • Active fans

  • Cooling cases

  • Thermal paste

However, what I can't find is much testing showing what combinations of cooling are the most effective. Has anyone tested this?

Julian Lachniet
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4 Answers4

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Airflow is more important than a heatsink; which is to say that no heatsink will be effective without some airflow - or some way to conduct heat away from the CPU. Also, for whatever airflow you have, the cooling effect can be improved with a better/bigger heatsink. The heatsink draws the heat out, but it takes some airflow to dispose of that heat!

When I researched and considered solutions a few weeks ago, I decided to go with a small aluminum "stick-on" heat sink, and more importantly: removed the cover from my case. Q: Why?

There are some who say no heatsink is necessary, but I find this "luddite logic" faulty. If I wanted a Pi that ran at lower clock speeds/had lesser performance, then I would have stuck with my older unit! OTOH, if you're OK with "throttling", then you can ignore all of this heatsink business. But if you're overclocking, then clearly you're not interested in a "throttled" Pi 3B+.

Seamus
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I have a Raspberry Pi 3 B, but I had a problem: the RPi was very slow. I searched lots of tutorials and I discovered that the RPi's processor should be cooled.

I tested some combinations and the best was:

-Heatsinks (3)

-Thermal paste (Put between the zone what you want to refrigerate and the heatsink(s) )

-A fan mounted above the heatsink(s)

dominic03
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yanko
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If your doing serious overclocking you want water cooling or a peltier block. The latter is electrically cooled. Here is wiki on thermal electric https://en.wikipedia.org/wiki/Thermoelectric_effect

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The Pi 3 B+ comes with a heatsink already. I am sure you can stick an aftermarket heatsink to this to (possibly) improve the heat dissipation.

Here's a fairly good break down of what you can achieve over the stock heatsink: https://www.youtube.com/watch?v=RxBaEiQHzLU

yaquaholic
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