On 08/08/2019 04:08, A. Dumas wrote:
> Bottleneck for operating a Pi 4 in general is overheating. It's bad. It's
> idling towards 70 C in a fairly open Pimoroni case. I let the fan kick in
> at 65 C which drops it to 55 C in 30 seconds or so. In a minute or two it's
> back up to 65 C.

Something is wrong there. At 26.3C ambient and 53RH, my Pi 4B in a
Pimoroni ninja case is idling at 51C to 57C, and with the Pimoroni fan
shim on the idle is reduced to 42C to 44C, and it's never gone over 65C
under load.

> Throttling would occur at 80 C which is easily reached
> with any sort of load. A Pi 3+ in the same case with a tiny heatsink
> (stick-on without thermal paste) idles at 50-55.

All depends on airflow, with my 3B+ until I put a small 5V fan (running
from 3V3) in the case, the heatsink wasn't effective.

---druck

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