RPi5 8GB + €13 Geekworm P573 passive aluminum case

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I bought this case from Amazon.
Comes with an copper adapter for the CP'U and foam pads for the other ic's. I left the test running even a little longer but never got the temperature beyond 60°C.
Its fanless. Love it.

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Actually....
It goes beyond 60°C if you wait long enough... but 63°C core temp is okay for a fully stressed fanless system. On the outside it feels like a hand warmer. Warm but not too hot to hold.

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Note for future-me:

install:

sudo apt-get install pip
python3 -m pip install stressberry --break-system-packages

to run 1800s:
stressberry-run out.dat -d 1800

to convert dat to png:
MPLBACKEND=Agg stressberry-plot out.dat -o out.png