上一篇「Raspberry Pi 5」提到了一些來自 Raspberry Pi 官方的說明，後續各個媒體 (像是 YouTuber) 也都解禁放出不少資料可以參考了，其中電源的部分在「Answering some questions about the Raspberry Pi 5」這邊看到不認 USB PD 的 5V/5A 的問題，目前看起來是走獨規：
I also tested the Radxa USB-C PD 30W power adapter, which says it will output 5V at 5A, but the Pi only negotiates 3A with it right now. I've been in contact with Pi engineers and it seems like they have one on the way to test to see why it's not negotiating more.
另外看起來之後有機會支援 12V/2.25A (換算起來是 27W) 的充電頭，有機會透過韌體更新認得 PD？
I should also note the official adapter lists 12V at 2.25A output as an option, so maybe some future Pi could take that and run with it, for increased compatibility with more USB-C PD adapters (5V at 5A is a rarely seen, though it's an option in the spec).
不過即使走 5V/3A (15W)，在一般的應用下是夠用了，到時候拿到來玩看看...