jamesh
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Re: Raspberry Pi 4 temperature

Sun May 24, 2020 9:59 am

davidtuti wrote:
Sun May 24, 2020 9:51 am
Hi
Recently I purchased a new rasp4.
Have installed Kodi, Docker, transmission and some light scripts every x minutes executing.
I’ve checked temperature and I have an average of 55C. Now I’m watching a movie in kodi and I have 62C stables.
What do you think about that temperature? Do you think should I worry?
No. You never need to worry about temperatures, the Pi will regulate itself.
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davidtuti
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Joined: Tue Oct 22, 2013 6:21 am

Re: Raspberry Pi 4 temperature

Sun May 24, 2020 10:10 am


There are also cheap stick-on heat sinks, and this one is very effective and very cheap:
https://uk.rs-online.com/web/p/heatsinks/7500951/
I see that it seems heatsinks are not very efficient https://youtu.be/E-4GaAz7XNM

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bensimmo
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Location: East Yorkshire

Re: Raspberry Pi 4 temperature

Wed May 27, 2020 3:08 pm

jarinalepetiot wrote:
Wed May 27, 2020 2:42 pm
[*]Raspbian full
[*]GUI off
[*]Zabbix server/Zabbix agent
[*]Grafana
[*]Minecraft Java server
[*]OpenVaultMedia
[*]Ethernet link
[*]miniSD 32Gb High speed
[*]65W power supply

Without fan : start at 41°c, average 75°c, some spike do 79°
with case+fan (5V) : start 33°c, average 35°c, max 43°c (metric took every 15Sec)
Case :
temp.pngRPI 4b4G v1.1 :
So the conclusion is you don't need the case and fan?

pfletch101
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Location: Buffalo, NY, USA

Re: Raspberry Pi 4 temperature

Wed May 27, 2020 3:28 pm

bensimmo wrote:
Wed May 27, 2020 3:08 pm
jarinalepetiot wrote:
Wed May 27, 2020 2:42 pm

Without fan : start at 41°c, average 75°c, some spike do 79°
with case+fan (5V) : start 33°c, average 35°c, max 43°c (metric took every 15Sec)
Case :
temp.pngRPI 4b4G v1.1 :
So the conclusion is you don't need the case and fan?
Insufficient data, but my conclusion would be that the case and fan are probably providing benefit.
1) You don't know (insufficient data, as I said) whether the peak temperatures without extra cooling required throttling to protect the system. If they did, one is losing performance, which may or may not be a problem.
2) I find it difficult to believe that running any electronic component at or near the top of its rated temperature range is a good idea, if there is a reasonable way to run it at more moderate temperatures, as is the case here.

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Imperf3kt
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Re: Raspberry Pi 4 temperature

Wed May 27, 2020 4:41 pm

The Raspberry Pi's temperature range goes well beyond 85°C, that's just where the engineers decided it was getting dangerously hot for humans so added throttling there.
You're not running near its maximum temperature, even if you exceed the throttling point. (As far as I am aware, each Pi they make gets tested in an oven at around 120°C)
55:55:44:44:4C
52:4C:52:42:41

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Re: Raspberry Pi 4 temperature

Wed May 27, 2020 5:07 pm

Imperf3kt wrote:
Wed May 27, 2020 4:41 pm
The Raspberry Pi's temperature range goes well beyond 85°C, that's just where the engineers decided it was getting dangerously hot for humans so added throttling there.
You're not running near its maximum temperature, even if you exceed the throttling point. (As far as I am aware, each Pi they make gets tested in an oven at around 120°C)
The design, ie prototypes and first production tests are given the oven treatment, noty each one that comes off the line - not time for that sort of testing.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed.
I've been saying "Mucho" to my Spanish friend a lot more lately. It means a lot to him.

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bensimmo
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Location: East Yorkshire

Re: Raspberry Pi 4 temperature

Wed May 27, 2020 5:46 pm

pfletch101 wrote:
Wed May 27, 2020 3:28 pm
bensimmo wrote:
Wed May 27, 2020 3:08 pm
jarinalepetiot wrote:
Wed May 27, 2020 2:42 pm

Without fan : start at 41°c, average 75°c, some spike do 79°
with case+fan (5V) : start 33°c, average 35°c, max 43°c (metric took every 15Sec)
Case :
temp.pngRPI 4b4G v1.1 :
So the conclusion is you don't need the case and fan?
Insufficient data, but my conclusion would be that the case and fan are probably providing benefit.
1) You don't know (insufficient data, as I said) whether the peak temperatures without extra cooling required throttling to protect the system. If they did, one is losing performance, which may or may not be a problem.
2) I find it difficult to believe that running any electronic component at or near the top of its rated temperature range is a good idea, if there is a reasonable way to run it at more moderate temperatures, as is the case here.
I didn't say it didn't bring the temperature down, but if the information given shows it peaks at 79C, hence it is below the throttling stage, so no performance is being lost, provided by the data given. If better evidence can be given to show it is hitting 80C or above and throttling, then a different conclusion can be given.
So I still conclude from the information given, in this setup the case and fan are not needed.

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