According to the documentation the 5A power supply should increase the current available to USB connected peripherals to 1.5A total.Many of the tests were for half an hour but I am retired where half hour tests fit in with watching TV, cooking and gardening.
Firstly, this must have taken ages... It's crazy to see a Cray supercomputer ranked so low beside the tiny Pi! but just wanted to say from my understanding, if you have the "official" power supply then you get extra USB power.
I just retested USB loading using the new 5 amps power supply. It made matters worse. I connected two disk drives via an unpowered hub. Both dropped off line on booting and, for a time, I thought that I had destroyed another Pi 5, but it came back to life. Then with one drive via the hub, that one dropped off line with measured USB current nearly 1 amp with at nearly 5 volts, higher than before. So, higher volts means higher current, making it easier to breaching the 900 mA maximum current specification, that seems to still apply.
https://www.raspberrypi.com/documentati ... -pi-5.html
If this is not happening the PD negotiation may not be working. Try turning everything off then unplug the wall wart and replug it.
Are there any warning messages related to the power at boot time?
Statistics: Posted by ejolson — Wed Jan 24, 2024 11:12 pm