[iamtedd]

Not on the linked page.

"Will my Raspberry Pi 4 power supply work with Raspberry Pi 5?

"Raspberry Pi 5 is a higher-performance computer than Raspberry Pi 4, and you may have problems using an under-powered supply. We recommend a high-quality 5W 5A USB-C power supply, such as the new Raspberry Pi 27W USB-C Power Supply."

The question asks about power requirements, but the answer is about performance?

The first time I read that I thought the 5 needs more power than the 4, not less.

[weebull]

> we recommend a 5w PSU like our new 27W PSU

Ermmm, what?

[marcosdumay]

It's clearly a typo, and should be 5V.

But then you get 5V 5A ... 27W that is clearly incorrect too. So my guess is nobody is proofreading the technical specifications, and everybody that cares was kept away from that page.

[nimmen]

5V * 5A = 25W, no PSU is 100% effective so 27W is reasonable requirement

[marcosdumay]

You don't specify a PSU by its energy consumption. You specify it by output.

Also, that 92% efficiency, is believable, but a bit high for a 5V 5A PSU (this is a difficult combination). I would expect any such unity to be marketed as high-efficiency.

[ralphm]

I expect it is 27W to support 9V 3V, not because of tolerances per se. (Source https://www.sparkfun.com/products/23583)

[pja]

It’s a typo: They mean 5A I think.