Specifications Test 1-6: Raspberry pi 3 model B, running Raspbian 10.0 Buster. Offical Standard Rpi plastic case from Rpi store.
Specifications Test 7: Raspberry 5, running Raspbian 12.0 Bookworm. Offical Standard Rpi plastic case + fan from Rpi store.
The CPU will be stressed and temperature measurements taken and graphed for a variety of cooling solutions. ARM CPU temperature measurements by software rpi_tempmon.py stress test option. Rpi_tempmon uses the sysbench benchmarking tool to stress CPU. The CPU stress test consists of calculation of prime numbers up to a value of 20000. All calculations are performed using 64-bit integers. 4 worker threads are created. CPU temperature and freq are recorded for each test run and graphed. 5 test iterations per test. Test 2-6 duration: 10 minutes, Test 1 duration 12 minutes due to thermal throttling slowing down CPU.
The first graph is created in libreoffice calc by using CSV(comma separted values) log file data produced by rpi_tempmon.py during testing. The other graphs are generated by rpi_tempmon.py at end of testrun.
- Test 1 - RPI3 No Heatsink .
- Test 2 - RPI3 Small Heatsink 13 by 15 by 7 (mm).
- Test 3 - RPI3 Medium Heatsink 16 by 22 by 7 (mm).
- Test 4 - RPI3 Large heatsink 35 by 35 by 22 (mm).
- Test 5 - RPI3 Small Heatsink + 60mm fan running at 5V.
- Test 6 - RPI3 Small Heatsink + 80mm fan running at 9V.
- Test 7 - RPI 5 Official RPI basic Kit case + fan and small heatsink.
- All Data graph. (test 1-6)
- Test 1 - No Heatsink.
- Test 2 - small Heatsink 13 by 15 by 7 (mm).
- Test 3 - Small + medium Heatsink 16 by 22 by 7 (mm).
- Test 4 - Small + medium + large heatsink 35 by 35 by 22 (mm).
- Test 5 - Small Heatsink + 70mm fan running at 5V.
- Test 6 - Small heatsink + 80mm fan running at 9V.
- Test 7 - RPI 5 Official RPI basic Kit case + fan and small heatsink
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