The schematic shows up to 20v on USB-C port. Though I’m not going to be the guy to test it. 
USB-C ports can handle 20v, even the thunderbolt-3 protocol uses it… but I am not sure the power distribution circuit was made to handle that kind of voltage…
I am sure the traces linked to that port were designed to handle 12v max.
In addition to the schematic, 5-20 volt input to USB-C port is seen throughout the literature. Would lead me to believe that the VIM3 can accept up to 20v supplied to it’s USB-C port.
The NB679GD can take input up to 24v, and the NB680GD up to 26v.
Anyway, we’re straying away from the OP’s original subject, so we should get back to that.
fascinating, then why is the 12v level stuck in my head for some reason. must have lost my marbles.
your right, let’s get back to point…
By the way, I once talked about 20 V. and you corrected me, remember?
doesn’t ring a bell… perhaps I was talking about USB-PD and that is limited to 12v on the charger…
never mind let’s not wander off here…
Of course we won’t, you are the only one who “knows everything”
I’m flattered, thank you 
Hello, checking this thread again, could you confirm what is the maximum mha the GPIO 5V connector can deliver please? Can it deliver a max of 3A as long as there are not other consumptions?