Apparently it is being throttled at 60 degrees. From the documentation:
"For Raspberry Pi 3 Model B+, the PCB technology has been changed to provide better heat dissipation and increased thermal mass. In addition, a soft temperature limit has been introduced, with the goal of maximising the time for which a device can "sprint" before reaching the hard limit at 85°C. When the soft limit is reached, the clock speed is reduced from 1.4GHz to 1.2GHz, and the operating voltage is reduced slightly. This reduces the rate of temperature increase: we trade a short period at 1.4GHz for a longer period at 1.2GHz. By default, the soft limit is 60°C, and this can be changed via the temp_soft_limit setting in config.txt."
So since my Pi has been running at about 62 degrees I upped the soft limit to 65 degrees and it doesn't throttle any more. Not sure what is going to happen in warmer weather since the Pi is in a window on the west side of the building.
"For Raspberry Pi 3 Model B+, the PCB technology has been changed to provide better heat dissipation and increased thermal mass. In addition, a soft temperature limit has been introduced, with the goal of maximising the time for which a device can "sprint" before reaching the hard limit at 85°C. When the soft limit is reached, the clock speed is reduced from 1.4GHz to 1.2GHz, and the operating voltage is reduced slightly. This reduces the rate of temperature increase: we trade a short period at 1.4GHz for a longer period at 1.2GHz. By default, the soft limit is 60°C, and this can be changed via the temp_soft_limit setting in config.txt."
So since my Pi has been running at about 62 degrees I upped the soft limit to 65 degrees and it doesn't throttle any more. Not sure what is going to happen in warmer weather since the Pi is in a window on the west side of the building.
Statistics: Posted by knute — Mon Mar 04, 2024 4:07 pm