Power Consumption with CPU Stressed
I’m using s-tui to stress the CPU, which in turn uses the stress tool.
I can stress the CPU by changing the mode from monitor to stress. Here are the results for each machine.
As the chart illustrates, the Pi 5 uses less than half the power compared to the N95 and N100 machines, while it’s almost as fast. Remember that the NUC (i7-1360P) is more than four times faster.
The Pi 5 power consumption includes the CPU fan (which only activates when the CPU temperature rises over 50 degrees C), but doesn’t include the 2 case fans, as the machine runs so cool they didn’t activate. If I set the GPIO fan mode to Performance or Always On, the case fans come on, and power usage goes up from 8w/h to slightly more than 9w/h (an increase of slightly more than 1w/h).
Power usage figures are higher if other system components (GPU, disk etc) are also stressed. The chart reflects power consumption stressing the CPU only.
Next page: Page 4 – Electricity Costs / Specifications
Pages in this article:
Page 1 – Power Consumption With System Idle
Page 2 – Power Consumption With Light Usage
Page 3 – Power Consumption With CPU Stressed
Page 4 – Electricity Costs / Specifications