Power consumption QC5000M

The A4 5000 is a very low power embedded CPU. It should be more than fine with
a 60w power brick. You can see the peak power draw in this review from Techspot:
https://www.techspot.com/review/671-amd-a4-5000-kabini/page2.html

Under full load on both the CPU and GPU (Prime 95 and Furmark) the system pulled
just 23w. I am guessing your custom MiniPC is using a Pico/equivalent power adapter
to allow for external power bricks, either way, your 60w brick is overkill in
the configuration you are using. A 75w brick would only really be needed if you
were to install a mid range or higher PCIe GPU that needs more power. That would
be more or less pointless as the CPU would bottleneck anything more than a low
end GPU.

I hope this answers your question.