07-21-2021, 07:07 PM
@Ride154
Just one more consideration.
1) the RPi4B runs hotter than previous models.
2) the RPi4B starts throttling when the CPU temperature reaches about 80C (ref https://www.raspberrypi.org/documentatio...agement.md). NOTE - that's an internally sensed temperature, not a case temperature.
3) in my tests of an RPi4B in an Argon 40 Case taking advantage only of its passive cooling solution, I see the CPU temperature reported by the RPi's firmware is already roughly 15C higher than ambient air temperature with moOde 7.3.0 running at idle. Jeff Geerling has reported in his blog that his RPi4B in the same case never got more than roughly 40C above ambient under his max-load test.
4) given the conditions in a car's interior on a hot day before the A/C has done its job, I suspect one needs passive cooling at least as good as that provided by the Argon case, especially if the RPi is tucked away somewhere. Of course there are also active, fan-based cooling solutions available, including the fan built into the Argon case (which I don't bother with at home).
Regards,
Kent
Just one more consideration.
1) the RPi4B runs hotter than previous models.
2) the RPi4B starts throttling when the CPU temperature reaches about 80C (ref https://www.raspberrypi.org/documentatio...agement.md). NOTE - that's an internally sensed temperature, not a case temperature.
3) in my tests of an RPi4B in an Argon 40 Case taking advantage only of its passive cooling solution, I see the CPU temperature reported by the RPi's firmware is already roughly 15C higher than ambient air temperature with moOde 7.3.0 running at idle. Jeff Geerling has reported in his blog that his RPi4B in the same case never got more than roughly 40C above ambient under his max-load test.
4) given the conditions in a car's interior on a hot day before the A/C has done its job, I suspect one needs passive cooling at least as good as that provided by the Argon case, especially if the RPi is tucked away somewhere. Of course there are also active, fan-based cooling solutions available, including the fan built into the Argon case (which I don't bother with at home).
Regards,
Kent
