I was kind of disappointed that no one gave any numbers, especially given how much better the power consumption is after the mod.
Note that my testing was done with a couple rounds of powerstat so pretty rudimentary. Procedure was to leave module unplugged, run powerstatfor one cycle with the whole system just idle and ensuring the backlight stayed consistent (didn’t dim from lack of use). Plug module in, wait a minute or so for everything to settle, and then re-run a round of powerstat and compare the average consumption during both runs. Repeated pre-mod and post-mod twice. Both tests were with nothing plugged in to HDMI, just it plugged in to the expansion slot.
Pre-mod averaged about 1.5 W at all times.
Post-mod was closer to 0.1 W.
If anyone can do more tests with a real USB power measurement tool, I’d love to see them.
Also, if anyone who comes across this really wants those savings but isn’t comfortable doing the mod, feel free to reach out and I’ll do what I can.