That is almost true. 600mA is the idle power consumption for the Pi4B (despite a slightly misleading "active" heading in one table). Under stress loads, without peripherals, it can be twice that or slightly more. It's good practice to allow for USB peripherals and to leave a safety margin. Given that the actual load in this case has not been specified, I strongly recommend following the manufacturer's recommended supply allowance of 3A. Coincidentally, RPi manufacture a high-quality, economically priced supply that meets that specification....It only needs 3A if you have USB, HAT, or other devices hung off it and drawing significant power. The bare 4B only needs about 600mA. I happily run my pihole cluster (a pair of 4Bs) off the USB-A power ports built into an IKEA power strip, which is rated at max 2600mA.A Pi4B need a USB-C PSU capable of 5V 3A.
The official power supply is the safe and easy option, and reasonably inexpensive, but you can use lower power units as long as they are stable at 5V and exceed your actual peak demand.
Reference: Typical power requirements
Statistics: Posted by davidcoton — Sat Sep 07, 2024 7:10 pm