On 23/02/2021 14:30, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
It's very common for motherboards to power USB ports when the computer
is shutdown, as long as power is going to the PS. The PS would normally
have an output labelled +5VSB or similar.

It looks to be a 'relatively' recent thing. The old MB fitted to that
computer didn't. But luckily there is a way to turn it off.

Define relative :-)

My 9 year old Gigabyte MB supports what it calls, "On/Off Charge
Technology", where it "allows you to charge your iPhone, iPad and iPod
Touch regardless of whether your PC is on, in standby mode or even off".