I recently bought a Raspberry Pi 4 Model B. This is the first time I have bought a Raspberry Pi. As per my understanding, the recommended power supply is 5.1V / 3A. I am using a different power supply that can deliver up to 5.1V / 2.7A. However, the Pi doesn't seem to draw more than 1.25A on average with a fan on GPIO and one USB device connected. Even with stress test (stressberry), the maximum current draw was around 1.7A.

Is my Pi 4 original or is it some fake with under-powered fake components?

PS: I am measuring the current draw with an in-line USB power meter.

  • 1
    Why do you think that any electrical device should draw all the current that the PSU can supply? It makes no sense to supply a PSU that can just power the target equipment.
    – Chenmunka
    Dec 16, 2022 at 21:50
  • @Chenmunka I understand that the device is not expected to draw the max current at all times. After looking at the documentation suggested by Seamus, I understand now that the 3.0 A will be required in only extreme cases and my RasPi's current draw is normal. Dec 17, 2022 at 13:08

1 Answer 1


The fact that your Raspberry Pi draws less than the recommended 3A power supply cannot be taken as even a weak indication that your RPi is not a genuine article. If you take a look at the RPi documentation covering power supplies, you'll see some figures that should put your mind at ease.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.