Topic guide
Desk power
Docks, USB-C power and GaN chargers for a desk with one cable to the laptop. We check makers' figures against the USB Power Delivery levels.
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Latest
Words you will see
- DisplayPort Alt ModeA USB-C mode that carries a DisplayPort video signal, so one USB-C port can drive a monitor.
- Docking stationA hub that connects a laptop to monitors, USB devices, network and power through one cable.
- GaN chargerA charger built with gallium nitride instead of silicon, which lets it be smaller for the same power.
- USB Power Delivery (USB PD)The USB standard for charging over USB-C; Revision 3.1 raised the ceiling from 100W to 240W.
FAQ
How much power can USB-C carry?
USB Power Delivery was limited to 100W, over 20V and USB-C cables rated at 5A, until Revision 3.1 added 28V, 36V and 48V levels for 140W, 180W and 240W.
Does a 65W charger give 65W to every port?
No. 65W is the total across the ports, so a laptop and a phone share it when both are plugged in.
Can one cable drive several monitors from my laptop?
It depends on the laptop's USB-C port. Docks that drive several screens need a host port with DisplayPort Alt Mode, so check your laptop before you plan three screens.
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