In reply to a post by WWWombat:

Wake on LAN isn't the only service ... wake on mouse & keyboard nowadays requires USB power.

I did say:

services such as wake on lan

I didn't fancy listing every reason the m/b would still need power.

In reply to a post by MHC:

Are you sure? On which page of the Tech Spec does it say the USB Integrated Sockets power down when te USB plug is removed?

Page 5 in the gloss underneath Dust Proof USB shutter ..... 'Zero cost on standby'

In reply to a post by 69bertie:

In reply to a post by MHC:

Are you sure? On which page of the Tech Spec does it say the USB Integrated Sockets power down when te USB plug is removed?

Page 5 in the gloss underneath Dust Proof USB shutter ..... 'Zero cost on standby'

Read the document again, VERY carefully. No where does it say that the USB socket has "Zero cost on Standby" , "Zero standby power consumption", or anything similar. And does it have a dust proof shutter?

Your making an easy mistake Bertie. It took me a while to spot where, as MHC is not being particularly helpful.

Page 5 is not about the USB-enabled 13amp sockets. It is about devices called USB charging modules. It was the dust shutter text that led me to it, as the ones you are using clearly don't have USB shutters.

This is a video of a test that shows a socket with inbuilt USB drawing no current when no device is plugged in. It demonstrates there is zero cost on standby as stated in the MK document.
https://www.youtube.com/watch?v=NRiTuIdbU8g

Edited by deleted (Wed 03-Aug-16 08:41:49)

The last few seconds of the commentary says "it most likely does [draw some current] but it's so negligible...".

Totally different brand

Didn't its booklet also say it took a little?

In reply to a post by BatBoy:

https://www.youtube.com/watch?v=NRiTuIdbU8g

Off topic, but amusing and perhaps relevant to current politics, in the panel of clips provided at the end of that one there is this one.

In reply to a post by cheshire_man:

The last few seconds of the commentary says "it most likely does [draw some current] but it's so negligible...".

Typically they can provide 2A at nominally 5v so 10W which equates to around 45mA at 230v. Allowing for losses there is probably around 50 to 60 mA needed at full power. In a quiescent state that will drop to anywhere from 2 to 10 mA depending on design and efficiency. Say 5mA - that will equate to around 10000Whr per year. It may be small but it is NOT zero.


edit: to tweak a few figures

Edited by MHC (Wed 03-Aug-16 11:02:38)