Specifications: Raspberry pi 3 model B, running Raspbian 10.0 Buster. Offical Standard Rpi plastic case 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 duration: 10 minutes took 12 for test 1 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 - 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 + 60mm fan running at 5V.
-
Test 6 - Small heatsink + 80mm fan running at 9V.
-
All Data graph.
-
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.
