[kwlug-disc] Raspberry Pi temperature

[CrankyOldBugger]

I'm looking around the web and it seems to me that the Raspi has a "soft"
temperature limit of 60C.  At that point you'll see throttling.

Now I have a bunch of raspis around the house doing various jobs, but I do
have four of them together in a rack under my desk.  So seeing that you
have more than one raspi now, let me recommend a really cool rack that I
picked up last summer:
https://www.amazon.ca/gp/product/B083FDHPBH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
.  Not only does it cool four raspis (models 2, 3 and 4), but it looks
really cool!

It's $50, but how much do four separate cases with fans cost nowadays?

Warning:  since you have two raspis now, and two empty slots on this rack,
you will be subject to irresistible temptation to buy two more raspis.  My
advice is to listen to your heart and buy the latest and greatest RP4+
models!





On Mon, 16 Aug 2021 at 10:26, Khalid Baheyeldin <kb at 2bits.com> wrote:

> I have two Raspberry Pis. One is a Pi 3B+ which I had for several years,
> and the other is a Pi 4, which is new, replacing what the older one was
> doing.
>
> The new Pi4 came with a kit that had a 5V fan.
>
> Both run Ubuntu 20.04 LTS Server.
>
> On the Pi4 with the fan, the file
> /sys/devices/virtual/thermal/thermal_zone0/temp shows its temperature to be
> usually 38C, and never above 40C.
>
> The older Pi3 only came with heat sinks, and the same file shows that it
> goes from 48C when idle, to 51C when doing something (MPD server).
>
> So here are my questions:
>
> 1. Is 51C bad?
> That is the temperature that a laptop runs at when doing 'something'.
>
> 2. Or is the Pi4 throttled so as not to heat up?
>
> 3. Any hints on throttling the Pi3 similarly?
>
> 4. Anyone knows of low cost cases with fans for the Pi3?
> --
> Khalid M. Baheyeldin
> _______________________________________________
> kwlug-disc mailing list
> kwlug-disc at kwlug.org
> https://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>
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