Power Consumption

I use the PowerJive USB Power Meter to measure power consumption with the Dramble and individual Raspberry Pis, in all cases with nothing plugged into USB (unless otherwise noted). I will be adding power consumption statistics to this page as time goes on.

There are a few different ways you can reduce power consumption on the Pi (any model):

  • Disable HDMI
  • Disable onboard LEDs
  • Minimize accessories

See this post for more information and instructions how to do all of the above: Conserve Raspberry Pis power consumption.

Raspberry Pi 3 Baseline

Pi State Power Consumption
Idle 260 mA (1.4W)
ab -n 100 -c 10 (uncached) 480 mA (2.4W)
400% CPU load (stress --cpu 4) 730 mA (3.7W)

Raspberry Pi 2 Baseline

Pi State Power Consumption
Idle 220 mA (1.1W)
ab -n 100 -c 10 (uncached) 450 mA (~2.3W)
400% CPU load (stress --cpu 4) 400 mA (~2.1W)

Raspberry Pi 2 with external USB 3.0 SSD

Pi State Power Consumption
Powering on, 1x USB 64GB SSD 900-1400 mA (~4.5W)
Idle, 1x USB 64GB SSD 960 mA (~4.8W)
ab -n 100 -c 10 (uncached), 1x USB 64GB SSD 1100 mA (~5.5W)
400% CPU load, 1x USB 64GB SSD 1250 mA (~6.25W)

Other Raspberry Pi models

For the below power tests, stock Rasbpian Lite was installed, and the measurement was taken after the Pi had been running idle for 1 minute, with nothing connected except onboard or USB WiFi as noted.

Pi Model Pi State Power Consumption
model 3 B HDMI off, LEDs off 230 mA (1.2W)
model 3 B HDMI off, LEDs off, onboard WiFi 250 mA (1.2W)
model 2 B HDMI off, LEDs off 200 mA (1.0W)
model 2 B HDMI off, LEDs off, USB WiFi 240 mA (1.2W)
Zero HDMI off, LED off 80 mA (0.4W)
Zero HDMI off, LED off, USB WiFi 120 mA (0.7W)
B+ HDMI off, LEDs off 180 mA (0.9W)
B+ HDMI off, LEDs off, USB WiFi 220 mA (1.1W)
A+ HDMI off, LEDs off 80 mA (0.4W)
A+ HDMI off, LEDs off, USB WiFi 160 mA (0.8W)

Also, as a point of reference, when you power off a Raspberry Pi (any model), it typically uses 20-30 mA (0.1W) until you physically disconnect the power.