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From: Adrian <bulleid@ku.gro.lioff>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: What do I need to go with a Pi 4
Date: Tue, 9 Apr 2024 22:19:57 +0100
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In message <uv494r$efer$1@dont-email.me>, druck <news@druck.org.uk> 
writes
>On 09/04/2024 13:52, Adrian wrote:
>> Apart from the Pi4, to upgrade, I know that I will need a bigger 
>>power supply and a HDMI adapter lead, but after, things are a bit 
>>vague.  Can I get away with the Pi4 without any additional cooling, or 
>>do I need a heat sink or fan, and if so, how do they get on with the 
>>hat ?  The space it is in has had a temperature range of -1 to 40 
>>degrees C, the mean across that time is about 15.5C.
>
>40C is quite a high ambient temperature. If you are going to run the Pi 
>4B hard with the likes of matplotlib, passive cooling my not be enough 
>to stop it throttling. One of mine has a large heat sink case with no 
>fan and never goes over 60C, but that's at a 20C ambient. For 40C 
>ambient, I would recommend a fan case, go for a 40mm fan if you want it 
>to be quiet, 30mm ones can be noisy.
>

40 was probably a one off (heat wave), but mid 30s occur every summer 
month.

I've been looking at fan cases, but they all seem to prevent the use of 
the HAT, which means I won't be able to find out what the ambient 
temperature is.  I suppose I could design one of my own.

Adrian
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