Thunderbolt Rookie - 15w vs 85w - Question

iriejedi

macrumors 6502a
Original poster
Oct 4, 2000
807
116
Nor Cal
Stepping into a new world.... leaving 2008 VGA behind....

my new monitor has 2 thunderbolt 3 plugs - one labled 15 Watt and the other labeled 85 Watt.

I think the 85 Watt is for charging lap tops.... but is it flexible? new iPad Pro charging?

When I plug my new Mac Mini in on Friday.... one or the other port?? The instructions are not clear on the difference and input vs output uses. Actually shows cables from a computer to both ports - letting me think both are inputs.....

Thoughts or Noobie advice on how to use this new fangled Thunderbolt system?

Monitor is the Samsung CJ79
 

chrfr

macrumors G3
Jul 11, 2009
8,175
2,508
Stepping into a new world.... leaving 2008 VGA behind....

my new monitor has 2 thunderbolt 3 plugs - one labled 15 Watt and the other labeled 85 Watt.

I think the 85 Watt is for charging lap tops.... but is it flexible? new iPad Pro charging?

When I plug my new Mac Mini in on Friday.... one or the other port?? The instructions are not clear on the difference and input vs output uses. Actually shows cables from a computer to both ports - letting me think both are inputs.....

Thoughts or Noobie advice on how to use this new fangled Thunderbolt system?

Monitor is the Samsung CJ79
I don't know if the iPad will charge from the display, but you won't hurt anything by trying it. With the Mini you can just use the 15W port as the Mini has its own power source.
 

F-Train

macrumors 65816
Apr 22, 2015
1,457
988
NYC & Newfoundland
The answers to your questions are on page 23 of your 31 page user manual, if it isn’t too much effort to consult it.

The page is rather unambiguously titled Connection Using a ThunderboltTM 3 Cable or USB Type-C Cable

The page also talks specifically about charging other devices and states that it may not work with some devices. Try it with the iPad, assuming that you have the right cable, which won’t take more power than it needs.
 
Last edited:

iriejedi

macrumors 6502a
Original poster
Oct 4, 2000
807
116
Nor Cal
The answers to your questions are on page 23 of your 31 page user manual, if it isn’t too much effort to consult it.

The page is rather unambiguously titled Connection Using a ThunderboltTM 3 Cable or USB Type-C Cable

The page also talks specifically about charging other devices and states that it may not work with some devices. Try it with the iPad, assuming that you have the right cable, which won’t take more power than it needs.
Thank you.

I did find this online. what it was not clear as to which one I plug the computer into.... almost seemed like either or. My current understanding they were super versatile.

I tried my work laptop in the 15 watt port and it works and seemingly at full resolution. 3444 X 1440.

iPad does charge in other port - had to disable auto sync in the iTunes on Work lap top - had some serious "trust" issues - kept asking over and over do you trust this computer. Of course not it is a work computer....

Speakers even worked with a lightning cable. Unexpected event - although I guess if HDMI does it...

Seems to charge new 2018 iPad pro.... So all in all - seems the next 4 days waiting for my new mini to arrive... it's going to have a decent monitor to play with. :)
 

inmnbob

macrumors regular
Aug 6, 2014
218
80
Chicago and Twin Cities
I just got this monitor too. I have the Mac mini connected to the 15watt Thinderbolt. I also use the 85 watt to power my laptop. You can do both at the same time but you
Need to boot with the one you want to feed your display since the monitor will recognize the first one as the source of the video.

I also have a display port to USB-C cable
Connected to the monitor to drive my laptop which I can select via the monitor controls. The third port on the monitor is the HDMI port which I have an Apple TV connect to.