1. Forum
  2. FidoNet
  3. RBERRYPI

  • Re: Passive cooling Raspberry Pi 4 B

    From Marco Moock@3:770/3 to All on Wednesday, August 16, 2023 13:35:55
    Am 16.08.2023 um 00:21:08 Uhr schrieb Pancho:

    On 8/15/23 17:58, Marco Moock wrote:
    Am 15.08.2023 um 16:01:53 Uhr schrieb Jan Panteltje:

    I have a Pi4 8 GB with passive cooling (used to post this)
    Room is 27 C, raspi is 71 to 72 C when not doing much.

    What happens if you stress the CPU?


    In my case, stress-ng --cpu 8 took the cpu temp up to a max of 70C
    after 45 minutes, at which time it plateaued.

    That was without putting the case in an external airflow. With the
    case in a strong external airflow, the cpu temp went down to 50C,
    after just 10 minutes.

    I assume you don't live at 35C without some kind of fan?

    True, but I will ask that to have a buffer.

    I will look for a metal housing that has a connection to the CPU, so
    the heat can spread to the entire housing.

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From Joerg Walther@3:770/3 to Marco Moock on Wednesday, August 16, 2023 14:08:08
    Marco Moock wrote:

    I will look for a metal housing that has a connection to the CPU, so
    the heat can spread to the entire housing.

    This is what the Flirc case has, the entire case gets kind of lukewarm
    when the Pi has to do some work.

    -jw-

    --

    And now for something completely different...

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From =?UTF-8?Q?Bj=c3=b6rn_Lundin?=@3:770/3 to Joerg Walther on Wednesday, August 16, 2023 13:36:37
    On 2023-08-15 18:35, Joerg Walther wrote:
    Marco Moock wrote:

    Sure, I have the passive Flirc full body aluminum case, it works
    wonderfully with the 4B, usually the temperature is below 60°C.

    I also have a Flirc, in a 2 m2 closet.
    it never reaches above 55 degrees summer or winter

    --
    /Björn

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From The Natural Philosopher@3:770/3 to Marco Moock on Wednesday, August 16, 2023 18:16:56
    On 16/08/2023 12:35, Marco Moock wrote:
    Am 16.08.2023 um 00:21:08 Uhr schrieb Pancho:

    On 8/15/23 17:58, Marco Moock wrote:
    Am 15.08.2023 um 16:01:53 Uhr schrieb Jan Panteltje:

    I have a Pi4 8 GB with passive cooling (used to post this)
    Room is 27 C, raspi is 71 to 72 C when not doing much.

    What happens if you stress the CPU?


    In my case, stress-ng --cpu 8 took the cpu temp up to a max of 70C
    after 45 minutes, at which time it plateaued.

    That was without putting the case in an external airflow. With the
    case in a strong external airflow, the cpu temp went down to 50C,
    after just 10 minutes.

    I assume you don't live at 35C without some kind of fan?

    True, but I will ask that to have a buffer.

    I will look for a metal housing that has a connection to the CPU, so
    the heat can spread to the entire housing.

    That works, but beware, still put vents in it for hot air to leak out

    --
    Climate Change: Socialism wearing a lab coat.

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From Joerg Walther@3:770/3 to The Natural Philosopher on Wednesday, August 16, 2023 19:59:58
    The Natural Philosopher wrote:

    I will look for a metal housing that has a connection to the CPU, so
    the heat can spread to the entire housing.

    That works, but beware, still put vents in it for hot air to leak out

    That is not possible, since the case is full body aluminum, there is
    simply not a space for more than the RPi4, and, as the others who have
    the same or a similar case stated, it is not necessary.

    -jw-

    --

    And now for something completely different...

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)